# frozen_string_literal: true

require "gir_ffi_test_helper"

require "gir_ffi"

GirFFI.setup :GIMarshallingTests

# Tests generated methods and functions in the GIMarshallingTests namespace.
describe GIMarshallingTests do
  let(:derived_klass) do
    Object.const_set("DerivedClass#{Sequence.next}",
                     Class.new(GIMarshallingTests::Object))
  end

  def make_derived_instance
    GirFFI.define_type derived_klass do |info|
      yield info if block_given?
    end
    derived_klass.new
  end

  describe "GIMarshallingTests::BoxedStruct" do
    let(:instance) { GIMarshallingTests::BoxedStruct.new }

    it "has a writable field long_" do
      instance.long_ = 42
      assert_equal 42, instance.long_
      instance.long_ = 43
      assert_equal 43, instance.long_
    end

    it "has a writable field string_" do
      instance.string_ = "foobar"
      _(instance.string_).must_equal "foobar"
    end

    it "has a writable field g_strv" do
      _(instance.g_strv).must_be :==, []
      instance.g_strv = %w(foo bar)
      _(instance.g_strv).must_be :==, %w(foo bar)
    end

    it "creates an instance using #new" do
      bx = GIMarshallingTests::BoxedStruct.new
      assert_instance_of GIMarshallingTests::BoxedStruct, bx
      _(bx.struct).must_be :owned?
    end

    it "has a working method #inv" do
      instance.long_ = 42
      instance.inv
      pass
    end

    it "has a working function #inout" do
      bx = GIMarshallingTests::BoxedStruct.new
      bx.long_ = 42
      _(bx.struct).must_be :owned?

      res = GIMarshallingTests::BoxedStruct.inout bx
      _(bx.struct).must_be :owned?
      _(res.struct).must_be :owned?

      assert_equal 0, res.long_
    end

    it "has a working function #out" do
      res = GIMarshallingTests::BoxedStruct.out
      _(res.struct).must_be :owned?
      assert_equal 42, res.long_
    end

    it "has a working function #returnv" do
      res = GIMarshallingTests::BoxedStruct.returnv
      _(res.struct).must_be :owned?
      assert_equal 42, res.long_
      _(res.g_strv).must_be :==, %w(0 1 2)
    end
  end

  it "has the constant CONSTANT_GERROR_CODE" do
    assert_equal 5, GIMarshallingTests::CONSTANT_GERROR_CODE
  end

  it "has the constant CONSTANT_GERROR_DEBUG_MESSAGE" do
    _(GIMarshallingTests::CONSTANT_GERROR_DEBUG_MESSAGE).must_equal(
      "we got an error, life is shit")
  end

  it "has the constant CONSTANT_GERROR_DOMAIN" do
    assert_equal "gi-marshalling-tests-gerror-domain",
                 GIMarshallingTests::CONSTANT_GERROR_DOMAIN
  end

  it "has the constant CONSTANT_GERROR_MESSAGE" do
    assert_equal "gi-marshalling-tests-gerror-message",
                 GIMarshallingTests::CONSTANT_GERROR_MESSAGE
  end

  it "has the constant CONSTANT_NUMBER" do
    assert_equal 42, GIMarshallingTests::CONSTANT_NUMBER
  end

  it "has the constant CONSTANT_UTF8" do
    assert_equal "const ♥ utf8", GIMarshallingTests::CONSTANT_UTF8
  end

  describe "GIMarshallingTests::Enum" do
    it "has the member :value1" do
      assert_equal 0, GIMarshallingTests::Enum[:value1]
    end

    it "has the member :value2" do
      assert_equal 1, GIMarshallingTests::Enum[:value2]
    end

    it "has the member :value3" do
      assert_equal 42, GIMarshallingTests::Enum[:value3]
    end
  end

  describe "GIMarshallingTests::Flags" do
    it "has the member :value1" do
      assert_equal 1, GIMarshallingTests::Flags[:value1]
    end

    it "has the member :value2" do
      assert_equal 2, GIMarshallingTests::Flags[:value2]
    end

    it "has the member :value3" do
      assert_equal 4, GIMarshallingTests::Flags[:value3]
    end

    it "has the member :mask" do
      assert_equal 3, GIMarshallingTests::Flags[:mask]
    end

    it "has the member :mask2" do
      assert_equal 3, GIMarshallingTests::Flags[:mask2]
    end

    it "has a working function #in" do
      GIMarshallingTests::Flags.in value2: true
    end

    it "has a working function #in_zero" do
      GIMarshallingTests::Flags.in_zero 0
    end

    it "has a working function #inout" do
      result = GIMarshallingTests::Flags.inout value2: true
      _(result).must_equal(value1: true)
    end

    it "has a working function #out" do
      result = GIMarshallingTests::Flags.out
      _(result).must_equal(value2: true)
    end

    it "has a working function #returnv" do
      result = GIMarshallingTests::Flags.returnv
      _(result).must_equal(value2: true)
    end
  end

  describe "GIMarshallingTests::GEnum" do
    it "has the member :value1" do
      assert_equal 0, GIMarshallingTests::GEnum[:value1]
    end

    it "has the member :value2" do
      assert_equal 1, GIMarshallingTests::GEnum[:value2]
    end

    it "has the member :value3" do
      assert_equal 42, GIMarshallingTests::GEnum[:value3]
    end

    it "has a working function #in" do
      GIMarshallingTests::GEnum.in :value3
    end

    it "has a working function #inout" do
      result = GIMarshallingTests::GEnum.inout :value3
      _(result).must_equal :value1
    end

    it "has a working function #out" do
      result = GIMarshallingTests::GEnum.out
      _(result).must_equal :value3
    end

    it "has a working function #returnv" do
      result = GIMarshallingTests::GEnum.returnv
      _(result).must_equal :value3
    end
  end

  describe "GIMarshallingTests::Interface" do
    it "has a working method #test_int8_in" do
      derived_klass.class_eval { include GIMarshallingTests::Interface }
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :test_int8_in, proc { |obj, in_| obj.int = in_ }
      end
      derived_instance.test_int8_in 8
      _(derived_instance.int).must_equal 8
    end
  end

  describe "GIMarshallingTests::Interface2" do
    it "must be tested for clashes with Interface" do
      skip "Needs more work to determine desired behavior"
    end
  end

  describe "GIMarshallingTests::Interface3" do
    it "has a working method #test_variant_array_in" do
      derived_klass.class_eval { include GIMarshallingTests::Interface3 }
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :test_variant_array_in, proc { |obj, in_|
          obj.int = in_.to_a.first.get_byte
        }
      end
      derived_instance.test_variant_array_in [GLib::Variant.new_byte(42)]
      _(derived_instance.int).must_equal 42
    end
  end

  describe "GIMarshallingTests::InterfaceImpl" do
    it "has a working method #get_as_interface" do
      obj = GIMarshallingTests::InterfaceImpl.new []
      result = obj.get_as_interface
      _(result).must_be_kind_of GIMarshallingTests::Interface
    end
  end

  describe "GIMarshallingTests::NestedStruct" do
    let(:instance) { GIMarshallingTests::NestedStruct.new }
    it "has a writable field simple_struct" do
      assert_instance_of GIMarshallingTests::SimpleStruct,
                         instance.simple_struct
      new_struct = GIMarshallingTests::SimpleStruct.new
      new_struct.int8 = 42
      instance.simple_struct = new_struct
      _(instance.simple_struct.int8).must_equal 42
    end
  end

  describe "GIMarshallingTests::NoTypeFlags" do
    it "has the member :value1" do
      assert_equal 1, GIMarshallingTests::NoTypeFlags[:value1]
    end
    it "has the member :value2" do
      assert_equal 2, GIMarshallingTests::NoTypeFlags[:value2]
    end
    it "has the member :value3" do
      assert_equal 4, GIMarshallingTests::NoTypeFlags[:value3]
    end
    it "has the member :mask" do
      assert_equal 3, GIMarshallingTests::NoTypeFlags[:mask]
    end
    it "has the member :mask2" do
      assert_equal 3, GIMarshallingTests::NoTypeFlags[:mask2]
    end
  end

  describe "GIMarshallingTests::NotSimpleStruct" do
    let(:instance) { GIMarshallingTests::NotSimpleStruct.new }

    it "has a writable field pointer" do
      _(instance.pointer).must_be_nil
      nested = GIMarshallingTests::NestedStruct.new
      nested.simple_struct.int8 = 23
      instance.pointer = nested
      _(instance.pointer.simple_struct.int8).must_equal 23
    end
  end

  it "has the constant OVERRIDES_CONSTANT" do
    assert_equal 42, GIMarshallingTests::OVERRIDES_CONSTANT
  end

  describe "GIMarshallingTests::Object" do
    it "creates an instance using #new" do
      ob = GIMarshallingTests::Object.new 42
      assert_instance_of GIMarshallingTests::Object, ob
      assert_equal 42, ob.int
    end

    it "fails to create an instance using #new_fail" do
      _(proc { GIMarshallingTests::Object.new_fail 42 }).must_raise GirFFI::GLibError
    end

    it "has a working function #full_inout" do
      ob = GIMarshallingTests::Object.new 42
      _(object_ref_count(ob)).must_equal 1

      res = GIMarshallingTests::Object.full_inout ob

      _(object_ref_count(ob)).must_equal 1
      _(object_ref_count(res)).must_equal 1

      _(res).must_be_instance_of GIMarshallingTests::Object
      _(res.int).must_equal 0
    end

    it "has a working function #full_out" do
      res = GIMarshallingTests::Object.full_out
      _(res).must_be_instance_of GIMarshallingTests::Object
      _(object_ref_count(res)).must_equal 1
    end

    it "has a working function #full_return" do
      res = GIMarshallingTests::Object.full_return
      _(res).must_be_instance_of GIMarshallingTests::Object
      _(object_ref_count(res)).must_equal 1
    end

    it "has a working function #none_inout" do
      ob = GIMarshallingTests::Object.new 42
      _(object_ref_count(ob)).must_equal 1

      res = GIMarshallingTests::Object.none_inout ob

      _(object_ref_count(ob)).must_equal 1
      _(object_ref_count(res)).must_equal 2

      _(res).must_be_instance_of GIMarshallingTests::Object
      _(ob.int).must_equal 42
      _(res.int).must_equal 0
    end

    it "has a working function #none_out" do
      res = GIMarshallingTests::Object.none_out
      _(res).must_be_instance_of GIMarshallingTests::Object
      _(object_ref_count(res)).must_equal 2
    end

    it "has a working function #none_return" do
      res = GIMarshallingTests::Object.none_return
      _(res).must_be_instance_of GIMarshallingTests::Object
      _(object_ref_count(res)).must_equal 2
    end

    it "has a working function #static_method" do
      GIMarshallingTests::Object.static_method
      pass
    end

    let(:instance) { GIMarshallingTests::Object.new 42 }

    it "has a working method #call_vfunc_with_callback" do
      cb = nil
      user_data = nil
      result = nil

      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :vfunc_with_callback, proc { |_obj, callback, callback_data|
          cb = callback
          user_data = callback_data.address
          result = callback.call(42, callback_data)
        }
      end
      derived_instance.call_vfunc_with_callback

      _(user_data).must_equal 0xdeadbeef
      # TODO: Change implementation of CallbackBase so that this becomes an
      # instance of GIMarshallingTests::CallbackIntInt
      _(cb).must_be_instance_of FFI::Function
      _(result).must_equal 42
    end

    it "has a working method #full_in" do
      skip "This function is defined in the header but not implemented"
    end

    it "has a working method #get_ref_info_for_vfunc_in_object_transfer_full" do
      obj = nil
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :vfunc_in_object_transfer_full, proc { |_this, object|
          obj = object
        }
      end
      result = derived_instance.
        get_ref_info_for_vfunc_in_object_transfer_full GIMarshallingTests::Object.gtype
      _(result).must_equal [1, false]
      _(obj).must_be_instance_of GIMarshallingTests::Object
    end

    it "has a working method #get_ref_info_for_vfunc_in_object_transfer_none" do
      obj = nil
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :vfunc_in_object_transfer_none, proc { |_this, object|
          obj = object
        }
      end
      result = derived_instance.
        get_ref_info_for_vfunc_in_object_transfer_none GIMarshallingTests::Object.gtype
      _(object_ref_count(obj)).must_be :>, 0
      _(result).must_equal [2, false]
      _(obj).must_be_instance_of GIMarshallingTests::Object
    end

    it "has a working method #get_ref_info_for_vfunc_out_object_transfer_full" do
      obj = nil
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :vfunc_out_object_transfer_full, proc { |_obj|
          obj = GIMarshallingTests::Object.new(42)
        }
      end
      result = derived_instance.get_ref_info_for_vfunc_out_object_transfer_full
      _(object_ref_count(obj)).must_be :>, 0
      # TODO: Check desired result
      _(result).must_equal [2, false]
    end

    it "has a working method #get_ref_info_for_vfunc_out_object_transfer_none" do
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :vfunc_out_object_transfer_none, proc { |_obj|
          GIMarshallingTests::Object.new 42
        }
      end
      result = derived_instance.get_ref_info_for_vfunc_out_object_transfer_none
      _(result).must_equal [1, false]
    end

    it "has a working method #get_ref_info_for_vfunc_return_object_transfer_full" do
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :vfunc_return_object_transfer_full, proc { |_obj|
          GIMarshallingTests::Object.new 42
        }
      end
      result = derived_instance.get_ref_info_for_vfunc_return_object_transfer_full
      _(result).must_equal [2, false]
    end

    it "has a working method #get_ref_info_for_vfunc_return_object_transfer_none" do
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :vfunc_return_object_transfer_none, proc { |_obj|
          GIMarshallingTests::Object.new 42
        }
      end
      result = derived_instance.get_ref_info_for_vfunc_return_object_transfer_none
      _(result).must_equal [1, false]
    end

    it "has a working method #int8_in" do
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :method_int8_in, proc { |obj, in_| obj.int = in_ }
      end
      derived_instance.int8_in 23
      _(derived_instance.int).must_equal 23
    end

    it "has a working method #int8_out" do
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :method_int8_out, proc { |_obj| 42 }
      end

      _(derived_instance.int8_out).must_equal 42
    end

    it "has a working method #method" do
      instance.method
      pass
    end

    it "has a working method #method_array_in" do
      instance.method_array_in [-1, 0, 1, 2]
      pass
    end

    it "has a working method #method_array_inout" do
      res = instance.method_array_inout [-1, 0, 1, 2]
      _(res).must_be :==, [-2, -1, 0, 1, 2]
    end

    it "has a working method #method_array_out" do
      res = instance.method_array_out
      _(res).must_be :==, [-1, 0, 1, 2]
    end

    it "has a working method #method_array_return" do
      res = instance.method_array_return
      _(res).must_be :==, [-1, 0, 1, 2]
    end

    it "has a working method #method_int8_arg_and_out_callee" do
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :method_int8_arg_and_out_callee, proc { |_obj, arg|
          2 * arg
        }
      end
      result = derived_instance.method_int8_arg_and_out_callee 32
      _(result).must_equal 64
    end

    it "has a working method #method_int8_arg_and_out_caller" do
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :method_int8_arg_and_out_caller, proc { |_obj, arg|
          2 * arg
        }
      end
      result = derived_instance.method_int8_arg_and_out_caller 32
      _(result).must_equal 64
    end

    it "has a working method #method_int8_in" do
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :method_int8_in, proc { |obj, in_| obj.int = in_ }
      end
      derived_instance.method_int8_in 108
      _(derived_instance.int).must_equal 108
    end

    it "has a working method #method_int8_out" do
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :method_int8_out, proc { |_obj| 42 }
      end
      _(derived_instance.method_int8_out).must_equal 42
    end

    it "has a working method #method_str_arg_out_ret" do
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :method_str_arg_out_ret, proc { |_obj, arg| [arg, 42] }
      end
      _(derived_instance.method_str_arg_out_ret("foo")).must_equal ["foo", 42]
    end

    it "has a working method #method_variant_array_in" do
      skip "This function is defined in the header but not implemented"
    end

    it "has a working method #method_with_default_implementation" do
      instance.method_with_default_implementation 104
      assert_equal 104, instance.int
    end

    it "has a working method #none_in" do
      instance.none_in
      pass
    end

    it "has a working method #overridden_method" do
      instance.set_property("int", 0)
      instance.overridden_method
      pass
    end

    it "has a working method #vfunc_array_out_parameter" do
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :vfunc_array_out_parameter, proc { |_obj|
          [1.1, 2.2, 3.3]
        }
      end
      result = derived_instance.vfunc_array_out_parameter
      arr = result.to_a
      _(arr.length).must_equal 3
      _(arr[0]).must_be_close_to 1.1
      _(arr[1]).must_be_close_to 2.2
      _(arr[2]).must_be_close_to 3.3
    end

    it "has a working method #vfunc_caller_allocated_out_parameter" do
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :vfunc_caller_allocated_out_parameter, proc { |_obj|
          "Hello!"
        }
      end
      result = derived_instance.vfunc_caller_allocated_out_parameter
      _(result).must_equal "Hello!"
    end

    it "has a working method #vfunc_meth_with_error" do
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :vfunc_meth_with_err, proc { |_object, x|
          raise "This is not the answer!" unless x == 42

          true
        }
      end
      result = derived_instance.vfunc_meth_with_error 42
      _(result).must_equal true

      err = _(proc { derived_instance.vfunc_meth_with_error(21) }).
        must_raise GirFFI::GLibError
      _(err.message).must_equal "This is not the answer!"
      _(err.domain).must_equal "gir_ffi"
      _(err.code).must_equal 0
    end

    it "has a working method #vfunc_multiple_out_parameters" do
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation(
          :vfunc_multiple_out_parameters,
          proc { |*_args| [42.1, -142.3] })
      end
      result = derived_instance.vfunc_multiple_out_parameters
      _(result[0]).must_be_close_to 42.1
      _(result[1]).must_be_close_to(-142.3)
    end

    it "has a working method #vfunc_one_out_parameter" do
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation(
          :vfunc_one_out_parameter,
          proc { |*_args| 23.4 })
      end
      _(derived_instance.vfunc_one_out_parameter).
        must_be_within_epsilon 23.4
    end

    it "has a working method #vfunc_out_enum" do
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :vfunc_out_enum, proc { |_obj| :value2 }
      end
      _(derived_instance.vfunc_out_enum).must_equal :value2
    end

    it "has a working method #vfunc_return_enum" do
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :vfunc_return_enum, proc { |_obj| :value2 }
      end
      _(derived_instance.vfunc_return_enum).must_equal :value2
    end

    it "has a working method #vfunc_return_value_and_multiple_out_parameters" do
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation(
          :vfunc_return_value_and_multiple_out_parameters,
          proc { |*_args| [42, -142, 3] })
      end
      _(derived_instance.vfunc_return_value_and_multiple_out_parameters).
        must_equal [42, -142, 3]
    end

    it "has a working method #vfunc_return_value_and_one_out_parameter" do
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation(
          :vfunc_return_value_and_one_out_parameter,
          proc { |*_args| [42, -142] })
      end
      _(derived_instance.vfunc_return_value_and_one_out_parameter).
        must_equal [42, -142]
    end

    it "has a working method #vfunc_return_value_only" do
      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :vfunc_return_value_only, proc { |_obj| 0x1234_5678 }
      end
      result = derived_instance.vfunc_return_value_only
      _(result).must_equal 0x1234_5678
    end

    it "has a working method #vfunc_with_callback" do
      result = 1

      derived_instance = make_derived_instance do |info|
        info.install_vfunc_implementation :vfunc_with_callback, proc { |_obj, callback, callback_data|
          callback.call(42, callback_data)
        }
      end

      derived_instance.vfunc_with_callback { |val, user_data| result = val + user_data }

      # The current implementation of the vfunc_with_callback method currently
      # doesn't actually call the virtual function vfunc_with_callback.
      _(result).must_equal 1
      _(result).wont_equal 42 + 23
    end

    describe "its 'int' property" do
      it "can be retrieved with #get_property" do
        assert_equal 42, instance.get_property("int")
      end
      it "can be retrieved with #int" do
        assert_equal 42, instance.int
      end
      it "can be set with #set_property" do
        instance.set_property("int", 13)
        assert_equal 13, instance.get_property("int")
      end
      it "can be set with #int=" do
        instance.int = 1
        assert_equal 1, instance.int
      end
    end
  end

  describe "GIMarshallingTests::OverridesObject" do
    it "creates an instance using #new" do
      ob = GIMarshallingTests::OverridesObject.new
      assert_instance_of GIMarshallingTests::OverridesObject, ob
    end

    it "has a working function #returnv" do
      ob = GIMarshallingTests::OverridesObject.returnv
      assert_instance_of GIMarshallingTests::OverridesObject, ob
    end

    let(:instance) { GIMarshallingTests::OverridesObject.new }

    it "has a working method #method" do
      result = instance.method
      _(result).must_equal 42
    end

    it "does not have accessors for its parent instance" do
      _(instance).wont_respond_to :parent_instance
      _(instance).wont_respond_to :parent_instance=
    end
  end

  describe "GIMarshallingTests::OverridesStruct" do
    let(:instance) { GIMarshallingTests::OverridesStruct.new }

    it "has a writable field long_" do
      instance.long_ = 43
      _(instance.long_).must_equal 43
    end

    it "creates an instance using #new" do
      ob = GIMarshallingTests::OverridesStruct.new
      assert_instance_of GIMarshallingTests::OverridesStruct, ob
    end

    it "has a working method #method" do
      _(instance.method).must_equal 42
    end

    it "has a working function #returnv" do
      ob = GIMarshallingTests::OverridesStruct.returnv
      assert_instance_of GIMarshallingTests::OverridesStruct, ob
    end
  end

  describe "GIMarshallingTests::PointerStruct" do
    it "creates an instance using #new" do
      ps = GIMarshallingTests::PointerStruct.new
      assert_instance_of GIMarshallingTests::PointerStruct, ps
    end

    let(:instance) { GIMarshallingTests::PointerStruct.new }

    it "has a writable field long_" do
      assert_equal 0, instance.long_
      instance.long_ = 1056
      assert_equal 1056, instance.long_
    end

    it "has a working method #inv" do
      instance.long_ = 42
      instance.inv
      pass
    end

    it "has a working function #returnv" do
      ob = GIMarshallingTests::PointerStruct.returnv
      assert_instance_of GIMarshallingTests::PointerStruct, ob
    end
  end

  describe "GIMarshallingTests::PropertiesObject" do
    it "creates an instance using #new" do
      ob = GIMarshallingTests::PropertiesObject.new
      assert_instance_of GIMarshallingTests::PropertiesObject, ob
    end

    let(:instance) { GIMarshallingTests::PropertiesObject.new }

    describe "its 'some-boolean' property" do
      it "can be retrieved with #get_property" do
        _(instance.get_property("some-boolean")).must_equal false
      end

      it "can be retrieved with #some_boolean" do
        _(instance.some_boolean).must_equal false
      end

      it "can be set with #set_property" do
        instance.set_property("some-boolean", true)
        _(instance.get_property("some-boolean")).must_equal true
      end

      it "can be set with #some_boolean=" do
        instance.some_boolean = true
        _(instance.get_property("some-boolean")).must_equal true
      end
    end

    describe "its 'some-boxed-glist' property" do
      it "can be retrieved with #get_property" do
        _(instance.get_property("some-boxed-glist")).must_be_nil
      end

      it "can be retrieved with #some_boxed_glist" do
        _(instance.some_boxed_glist).must_be_nil
      end

      it "can be set with #set_property" do
        instance.set_property("some-boxed-glist", [1, 2, 3])
        _(instance.some_boxed_glist.to_a).must_equal [1, 2, 3]
      end

      it "can be set with #some_boxed_glist=" do
        instance.some_boxed_glist = [1, 2, 3]
        _(instance.some_boxed_glist.to_a).must_equal [1, 2, 3]
        _(instance.get_property("some-boxed-glist").to_a).must_equal [1, 2, 3]
      end
    end

    describe "its 'some-boxed-struct' property" do
      it "can be retrieved with #get_property" do
        _(instance.get_property("some-boxed-struct")).must_be_nil
      end

      it "can be retrieved with #some_boxed_struct" do
        _(instance.some_boxed_struct).must_be_nil
      end

      it "can be set with #set_property" do
        boxed = GIMarshallingTests::BoxedStruct.new
        boxed.long_ = 42
        instance.set_property("some-boxed-struct", boxed)
        _(instance.get_property("some-boxed-struct").long_).must_equal 42
      end

      it "can be set with #some_boxed_struct=" do
        boxed = GIMarshallingTests::BoxedStruct.new
        boxed.long_ = 43
        instance.some_boxed_struct = boxed
        _(instance.some_boxed_struct.long_).must_equal 43
      end
    end

    describe "its 'some-byte-array' property" do
      before { skip_below("1.57.2") }

      it "can be retrieved with #get_property" do
        _(instance.get_property("some-byte-array")).must_be_nil
      end

      it "can be retrieved with #some_byte_array" do
        _(instance.some_byte_array).must_be_nil
      end

      it "can be set with #set_property" do
        instance.set_property "some-byte-array", "some bytes"
        _(instance.get_property("some-byte-array").to_string).must_equal "some bytes"
      end

      it "can be set with #some_byte_array=" do
        instance.some_byte_array = "some bytes"
        _(instance.some_byte_array.to_string).must_equal "some bytes"
      end
    end

    describe "its 'some-char' property" do
      it "can be retrieved with #get_property" do
        _(instance.get_property("some-char")).must_equal 0
      end

      it "can be retrieved with #some_char" do
        _(instance.some_char).must_equal 0
      end

      it "can be set with #set_property" do
        instance.set_property "some-char", 42
        _(instance.get_property("some-char")).must_equal 42
      end

      it "can be set with #some_char=" do
        instance.some_char = 43
        _(instance.some_char).must_equal 43
      end
    end

    describe "its 'some-double' property" do
      it "can be retrieved with #get_property" do
        _(instance.get_property("some-double")).must_equal 0.0
      end

      it "can be retrieved with #some_double" do
        _(instance.some_double).must_equal 0.0
      end

      it "can be set with #set_property" do
        instance.set_property("some-double", 3.14)
        _(instance.get_property("some-double")).must_equal 3.14
      end

      it "can be set with #some_double=" do
        instance.some_double = 3.14
        _(instance.some_double).must_equal 3.14
      end
    end

    describe "its 'some-enum' property" do
      before { skip_below("1.52.1") }

      it "can be retrieved with #get_property" do
        _(instance.get_property("some-enum")).must_equal :value1
      end

      it "can be retrieved with #some_enum" do
        _(instance.some_enum).must_equal :value1
      end

      it "can be set with #set_property" do
        instance.set_property("some-enum", :value3)
        _(instance.get_property("some-enum")).must_equal :value3
      end

      it "can be set with #some_enum=" do
        instance.some_enum = :value3
        _(instance.some_enum).must_equal :value3
        _(instance.get_property("some-enum")).must_equal :value3
      end
    end

    describe "its 'some-flags' property" do
      before { skip_below("1.52.1") }

      it "can be retrieved with #get_property" do
        _(instance.get_property("some-flags")).must_equal value1: true
      end

      it "can be retrieved with #some_flags" do
        _(instance.some_flags).must_equal value1: true
      end

      it "can be set with #set_property" do
        instance.set_property("some-flags", value3: true)
        _(instance.get_property("some-flags")).must_equal value3: true
      end

      it "can be set with #some_flags=" do
        instance.some_flags = :value3
        _(instance.some_flags).must_equal(value3: true)
        _(instance.get_property("some-flags")).must_equal(value3: true)
      end
    end

    describe "its 'some-float' property" do
      it "can be retrieved with #get_property" do
        _(instance.get_property("some-float")).must_equal 0.0
      end

      it "can be retrieved with #some_float" do
        _(instance.some_float).must_equal 0.0
      end

      it "can be set with #set_property" do
        instance.set_property("some-float", 3.14)
        _(instance.get_property("some-float")).must_be_close_to 3.14
      end

      it "can be set with #some_float=" do
        instance.some_float = 3.14
        _(instance.some_float).must_be_close_to 3.14
      end
    end

    describe "its 'some-gvalue' property" do
      before { skip_below "1.52.1" }

      it "can be retrieved with #get_property" do
        _(instance.get_property("some-gvalue")).must_be_nil
      end

      it "can be retrieved with #some_gvalue" do
        _(instance.some_gvalue).must_be_nil
      end

      it "can be set with #set_property" do
        value = GObject::Value.from 42
        instance.set_property("some-gvalue", value)
        _(instance.get_property("some-gvalue").get_value).must_equal 42
      end

      it "can be set with #some_gvalue=" do
        value = GObject::Value.from 42
        instance.some_gvalue = value
        _(instance.some_gvalue.get_value).must_equal 42
        _(instance.get_property("some-gvalue").get_value).must_equal 42
      end
    end

    describe "its 'some-int' property" do
      it "can be retrieved with #get_property" do
        _(instance.get_property("some-int")).must_equal 0
      end

      it "can be retrieved with #some_int" do
        _(instance.some_int).must_equal 0
      end

      it "can be set with #set_property" do
        instance.set_property "some-int", 4242
        _(instance.get_property("some-int")).must_equal 4242
      end

      it "can be set with #some_int=" do
        instance.some_int = 4243
        _(instance.some_int).must_equal 4243
      end
    end

    describe "its 'some-int64' property" do
      it "can be retrieved with #get_property" do
        _(instance.get_property("some-int64")).must_equal 0
      end

      it "can be retrieved with #some_int64" do
        _(instance.some_int64).must_equal 0
      end

      it "can be set with #set_property" do
        instance.set_property "some-int64", 42_000_000_000_000
        _(instance.get_property("some-int64")).must_equal 42_000_000_000_000
      end

      it "can be set with #some_int64=" do
        instance.some_int64 = 43_000_000_000_000
        _(instance.some_int64).must_equal 43_000_000_000_000
      end
    end

    describe "its 'some-long' property" do
      it "can be retrieved with #get_property" do
        _(instance.get_property("some-long")).must_equal 0
      end

      it "can be retrieved with #some_long" do
        _(instance.some_long).must_equal 0
      end

      it "can be set with #set_property" do
        instance.set_property "some-long", 4242
        _(instance.get_property("some-long")).must_equal 4242
      end

      it "can be set with #some_long=" do
        instance.some_long = 4243
        _(instance.some_long).must_equal 4243
      end
    end

    describe "its 'some-object' property" do
      it "can be retrieved with #get_property" do
        _(instance.get_property("some-object")).must_be_nil
      end

      it "can be retrieved with #some_object" do
        _(instance.some_object).must_be_nil
      end

      it "can be set with #set_property" do
        ob = GIMarshallingTests::Object.new 42
        instance.set_property "some-object", ob
        _(instance.get_property("some-object")).must_equal ob
      end

      it "can be set with #some_object=" do
        ob = GIMarshallingTests::Object.new 42
        instance.some_object = ob
        _(instance.some_object).must_equal ob
      end
    end

    describe "its 'some-readonly' property" do
      before { skip_below("1.57.2") }

      it "can be retrieved with #get_property" do
        _(instance.get_property("some-readonly")).must_equal 42
      end

      it "can be retrieved with #some_readonly" do
        _(instance.some_readonly).must_equal 42
      end
    end

    describe "its 'some-strv' property" do
      it "can be retrieved with #get_property" do
        _(instance.get_property("some-strv")).must_be :==, []
      end

      it "can be retrieved with #some_strv" do
        _(instance.some_strv).must_be :==, []
      end

      it "can be set with #set_property" do
        instance.set_property("some-strv", %w(foo bar))
        _(instance.get_property("some-strv")).must_be :==, %w(foo bar)
      end

      it "can be set with #some_strv=" do
        instance.some_strv = %w(foo bar)
        _(instance.some_strv).must_be :==, %w(foo bar)
      end
    end

    describe "its 'some-uchar' property" do
      it "can be retrieved with #get_property" do
        _(instance.get_property("some-uchar")).must_equal 0
      end

      it "can be retrieved with #some_uchar" do
        _(instance.some_uchar).must_equal 0
      end

      it "can be set with #set_property" do
        instance.set_property "some-uchar", 42
        _(instance.get_property("some-uchar")).must_equal 42
      end

      it "can be set with #some_uchar=" do
        instance.some_uchar = 43
        _(instance.some_uchar).must_equal 43
      end
    end

    describe "its 'some-uint' property" do
      it "can be retrieved with #get_property" do
        _(instance.get_property("some-uint")).must_equal 0
      end

      it "can be retrieved with #some_uint" do
        _(instance.some_uint).must_equal 0
      end

      it "can be set with #set_property" do
        instance.set_property "some-uint", 4242
        _(instance.get_property("some-uint")).must_equal 4242
      end

      it "can be set with #some_uint=" do
        instance.some_uint = 4243
        _(instance.some_uint).must_equal 4243
      end
    end

    describe "its 'some-uint64' property" do
      it "can be retrieved with #get_property" do
        _(instance.get_property("some-uint64")).must_equal 0
      end

      it "can be retrieved with #some_uint64" do
        _(instance.some_uint64).must_equal 0
      end

      it "can be set with #set_property" do
        instance.set_property "some-uint64", 42_000_000_000_000
        _(instance.get_property("some-uint64")).must_equal 42_000_000_000_000
      end

      it "can be set with #some_uint64=" do
        instance.some_uint64 = 43_000_000_000_000
        _(instance.some_uint64).must_equal 43_000_000_000_000
      end
    end

    describe "its 'some-ulong' property" do
      it "can be retrieved with #get_property" do
        _(instance.get_property("some-ulong")).must_equal 0
      end

      it "can be retrieved with #some_ulong" do
        _(instance.some_ulong).must_equal 0
      end

      it "can be set with #set_property" do
        instance.set_property "some-ulong", 4242
        _(instance.get_property("some-ulong")).must_equal 4242
      end

      it "can be set with #some_ulong=" do
        instance.some_ulong = 4243
        _(instance.some_ulong).must_equal 4243
      end
    end

    describe "its 'some-variant' property" do
      it "can be retrieved with #get_property" do
        _(instance.get_property("some-variant")).must_be_nil
      end

      it "can be retrieved with #some_variant" do
        _(instance.some_variant).must_be_nil
      end

      it "can be set with #set_property" do
        value = GLib::Variant.new_string("Foo")
        instance.set_property "some-variant", value
        _(instance.get_property("some-variant")).must_equal value
      end

      it "can be set with #some_variant=" do
        value = GLib::Variant.new_string("Foo")
        instance.some_variant = value
        _(instance.some_variant).must_equal value
      end
    end
  end

  describe "GIMarshallingTests::SecondEnum" do
    it "has the member :secondvalue1" do
      assert_equal 0, GIMarshallingTests::SecondEnum[:secondvalue1]
    end
    it "has the member :secondvalue2" do
      assert_equal 1, GIMarshallingTests::SecondEnum[:secondvalue2]
    end
  end

  describe "GIMarshallingTests::SimpleStruct" do
    it "creates an instance using #new" do
      ss = GIMarshallingTests::SimpleStruct.new
      assert_instance_of GIMarshallingTests::SimpleStruct, ss
    end

    let(:instance) { GIMarshallingTests::SimpleStruct.new }

    it "has a writable field long_" do
      _(instance.long_).must_equal 0
      instance.long_ = 1056
      _(instance.long_).must_equal 1056
    end

    it "has a writable field int8" do
      _(instance.int8).must_equal 0
      instance.int8 = -43
      _(instance.int8).must_equal(-43)
    end

    it "has a working method #inv" do
      instance.long_ = 6
      instance.int8 = 7
      instance.inv
      pass
    end

    it "has a working method #method" do
      instance.long_ = 6
      instance.int8 = 7
      instance.method
      pass
    end

    it "has a working function #returnv" do
      ss = GIMarshallingTests::SimpleStruct.returnv
      assert_instance_of GIMarshallingTests::SimpleStruct, ss
    end
  end

  describe "GIMarshallingTests::SubObject" do
    it "creates an instance using #new" do
      so = GIMarshallingTests::SubObject.new
      _(so).must_be_instance_of GIMarshallingTests::SubObject
      _(GObject.type_name_from_instance(so)).
        must_equal "GIMarshallingTestsSubObject"
    end

    let(:instance) { GIMarshallingTests::SubObject.new }

    it "has a working method #overwritten_method" do
      instance.overwritten_method
      pass
    end

    it "has a working method #sub_method" do
      instance.sub_method
      pass
    end

    it "does not have accessors for its parent instance" do
      _(instance).wont_respond_to :parent_instance
      _(instance).wont_respond_to :parent_instance=
    end
  end

  describe "GIMarshallingTests::SubSubObject" do
    it "creates an instance using #new" do
      so = GIMarshallingTests::SubSubObject.new
      assert_instance_of GIMarshallingTests::SubSubObject, so
      _(GObject.type_name_from_instance(so)).
        must_equal "GIMarshallingTestsSubSubObject"
    end

    let(:instance) { GIMarshallingTests::SubSubObject.new }

    it "does not have accessors for its parent instance" do
      _(instance).wont_respond_to :parent_instance
      _(instance).wont_respond_to :parent_instance=
    end
  end

  describe "GIMarshallingTests::Union" do
    it "creates an instance with #new" do
      u = GIMarshallingTests::Union.new
      assert_instance_of GIMarshallingTests::Union, u
    end

    let(:instance) { GIMarshallingTests::Union.new }

    it "has a writable field long_" do
      assert_equal 0, instance.long_
      instance.long_ = 1056
      assert_equal 1056, instance.long_
    end

    it "has a working method #inv" do
      instance.long_ = 42
      instance.inv
      pass
    end

    it "has a working method #method" do
      instance.long_ = 42
      instance.method
      pass
    end

    it "has a working function #inout" do
      skip "This function is defined in the header but not implemented"
    end

    it "has a working function #out" do
      skip "This function is defined in the header but not implemented"
    end

    it "has a working function #returnv" do
      u = GIMarshallingTests::Union.returnv
      assert_instance_of GIMarshallingTests::Union, u
    end
  end

  it "has a working function #array_bool_in" do
    skip_below "1.51.1"
    GIMarshallingTests.array_bool_in [true, false, true, true]
  end

  it "has a working function #array_bool_out" do
    skip_below "1.51.1"
    result = GIMarshallingTests.array_bool_out
    _(result.to_a).must_equal [true, false, true, true]
  end

  it "has a working function #array_enum_in" do
    GIMarshallingTests.array_enum_in [:value1, :value2, :value3]
  end

  it "has a working function #array_fixed_inout" do
    res = GIMarshallingTests.array_fixed_inout [-1, 0, 1, 2]
    _(res).must_be :==, [2, 1, 0, -1]
  end

  it "has a working function #array_fixed_int_in" do
    GIMarshallingTests.array_fixed_int_in [-1, 0, 1, 2]
    pass
  end

  it "has a working function #array_fixed_int_return" do
    res = GIMarshallingTests.array_fixed_int_return
    _(res).must_be :==, [-1, 0, 1, 2]
  end

  it "has a working function #array_fixed_out" do
    res = GIMarshallingTests.array_fixed_out
    _(res).must_be :==, [-1, 0, 1, 2]
  end

  it "has a working function #array_fixed_out_struct" do
    res = GIMarshallingTests.array_fixed_out_struct
    assert_equal [[7, 6], [6, 7]], res.map { |s| [s.long_, s.int8] }
  end

  it "has a working function #array_fixed_short_in" do
    GIMarshallingTests.array_fixed_short_in [-1, 0, 1, 2]
    pass
  end

  it "has a working function #array_fixed_short_return" do
    res = GIMarshallingTests.array_fixed_short_return
    _(res).must_be :==, [-1, 0, 1, 2]
  end

  it "has a working function #array_gvariant_container_in" do
    v1 = GLib::Variant.new_int32(27)
    v2 = GLib::Variant.new_string("Hello")
    result = GIMarshallingTests.array_gvariant_container_in [v1, v2]
    arr = result.to_a
    _(arr.size).must_equal 2
    _(arr[0].get_int32).must_equal 27
    _(arr[1].get_string).must_equal "Hello"
  end

  it "has a working function #array_gvariant_full_in" do
    v1 = GLib::Variant.new_int32(27)
    v2 = GLib::Variant.new_string("Hello")
    result = GIMarshallingTests.array_gvariant_full_in [v1, v2]
    arr = result.to_a
    _(arr.size).must_equal 2
    _(arr[0].get_int32).must_equal 27
    _(arr[1].get_string).must_equal "Hello"
  end

  it "has a working function #array_gvariant_none_in" do
    v1 = GLib::Variant.new_int32(27)
    v2 = GLib::Variant.new_string("Hello")
    result = GIMarshallingTests.array_gvariant_none_in [v1, v2]
    arr = result.to_a
    _(arr.size).must_equal 2
    _(arr[0].get_int32).must_equal 27
    _(arr[1].get_string).must_equal "Hello"
  end

  it "has a working function #array_in" do
    GIMarshallingTests.array_in [-1, 0, 1, 2]
    pass
  end

  it "has a working function #array_in_guint64_len" do
    GIMarshallingTests.array_in_guint64_len [-1, 0, 1, 2]
    pass
  end

  it "has a working function #array_in_guint8_len" do
    GIMarshallingTests.array_in_guint8_len [-1, 0, 1, 2]
    pass
  end

  it "has a working function #array_in_len_before" do
    GIMarshallingTests.array_in_len_before [-1, 0, 1, 2]
    pass
  end

  it "has a working function #array_in_len_zero_terminated" do
    GIMarshallingTests.array_in_len_zero_terminated [-1, 0, 1, 2]
    pass
  end

  it "has a working function #array_in_nonzero_nonlen" do
    GIMarshallingTests.array_in_nonzero_nonlen 1, "abcd".bytes.to_a
    pass
  end

  it "has a working function #array_in_utf8_two_in" do
    GIMarshallingTests.array_in_utf8_two_in [-1, 0, 1, 2], "1", "2"
    pass
  end

  it "has a working function #array_in_utf8_two_in_out_of_order" do
    GIMarshallingTests.array_in_utf8_two_in_out_of_order "1", [-1, 0, 1, 2], "2"
    pass
  end

  it "has a working function #array_inout" do
    res = GIMarshallingTests.array_inout [-1, 0, 1, 2]
    _(res).must_be :==, [-2, -1, 0, 1, 2]
  end

  it "has a working function #array_inout_etc" do
    arr, sum = GIMarshallingTests.array_inout_etc 42, [-1, 0, 1, 2], 24
    _(arr).must_be :==, [42, -1, 0, 1, 24]
    _(sum).must_equal 42 + 24
  end

  it "has a working function #array_int64_in" do
    skip_below "1.51.1"
    GIMarshallingTests.array_int64_in [-1, 0, 1, 2]
  end

  it "has a working function #array_out" do
    res = GIMarshallingTests.array_out
    _(res).must_be :==, [-1, 0, 1, 2]
  end

  it "has a working function #array_out_etc" do
    arr, sum = GIMarshallingTests.array_out_etc 42, 24
    _(arr).must_be :==, [42, 0, 1, 24]
    _(sum).must_equal 42 + 24
  end

  it "has a working function #array_return" do
    res = GIMarshallingTests.array_return
    _(res).must_be :==, [-1, 0, 1, 2]
  end

  it "has a working function #array_return_etc" do
    arr, sum = GIMarshallingTests.array_return_etc 42, 24
    _(arr).must_be :==, [42, 0, 1, 24]
    _(sum).must_equal 42 + 24
  end

  it "has a working function #array_simple_struct_in" do
    arr = [1, 2, 3].map do |val|
      GIMarshallingTests::SimpleStruct.new.tap { |struct| struct.long_ = val }
    end
    GIMarshallingTests.array_simple_struct_in arr
  end

  it "has a working function #array_string_in" do
    GIMarshallingTests.array_string_in %w(foo bar)
    pass
  end

  it "has a working function #array_struct_in" do
    arr = [1, 2, 3].map do |val|
      GIMarshallingTests::BoxedStruct.new.tap { |struct| struct.long_ = val }
    end
    GIMarshallingTests.array_struct_in arr
  end

  it "has a working function #array_struct_take_in" do
    arr = [1, 2, 3].map do |val|
      GIMarshallingTests::BoxedStruct.new.tap { |struct| struct.long_ = val }
    end
    # NOTE: This copies values so arr's elements stay valid
    GIMarshallingTests.array_struct_take_in arr

    _(arr.map(&:long_)).must_equal [1, 2, 3]
  end

  it "has a working function #array_struct_value_in" do
    arr = [1, 2, 3].map do |val|
      GIMarshallingTests::BoxedStruct.new.tap { |struct| struct.long_ = val }
    end
    GIMarshallingTests.array_struct_value_in arr
  end

  it "has a working function #array_uint64_in" do
    skip_below "1.51.1"
    GIMarshallingTests.array_uint64_in [-1, 0, 1, 2]
  end

  it "has a working function #array_uint8_in" do
    arr = "abcd".bytes.to_a
    GIMarshallingTests.array_uint8_in arr
    pass
  end

  it "has a working function #array_unichar_in" do
    skip_below "1.51.1"
    arr = [0x63, 0x6f, 0x6e, 0x73, 0x74,
           0x20, 0x2665, 0x20, 0x75, 0x74,
           0x66, 0x38]
    GIMarshallingTests.array_unichar_in arr
  end

  it "has a working function #array_unichar_out" do
    skip_below "1.51.1"
    result = GIMarshallingTests.array_unichar_out
    _(result.to_a).must_equal [0x63, 0x6f, 0x6e, 0x73, 0x74,
                               0x20, 0x2665, 0x20, 0x75, 0x74,
                               0x66, 0x38]
  end

  it "has a working function #array_zero_terminated_in" do
    GIMarshallingTests.array_zero_terminated_in %w(0 1 2)
    pass
  end

  it "has a working function #array_zero_terminated_inout" do
    res = GIMarshallingTests.array_zero_terminated_inout %w(0 1 2)
    _(res).must_be :==, ["-1", "0", "1", "2"]
  end

  it "has a working function #array_zero_terminated_out" do
    res = GIMarshallingTests.array_zero_terminated_out
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #array_zero_terminated_return" do
    res = GIMarshallingTests.array_zero_terminated_return
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #array_zero_terminated_return_null" do
    res = GIMarshallingTests.array_zero_terminated_return_null
    _(res).must_be :==, []
  end

  it "has a working function #array_zero_terminated_return_struct" do
    res = GIMarshallingTests.array_zero_terminated_return_struct
    _(res.to_a.map(&:long_)).must_equal [42, 43, 44]
  end

  it "has a working function #array_zero_terminated_return_unichar" do
    skip_below "1.51.1"
    res = GIMarshallingTests.array_zero_terminated_return_unichar
    _(res.to_a).must_equal [0x63, 0x6f, 0x6e, 0x73, 0x74,
                            0x20, 0x2665, 0x20, 0x75, 0x74,
                            0x66, 0x38]
  end

  it "has a working function #boolean_in_false" do
    GIMarshallingTests.boolean_in_false false
    pass
  end

  it "has a working function #boolean_in_true" do
    GIMarshallingTests.boolean_in_true true
    pass
  end

  it "has a working function #boolean_inout_false_true" do
    res = GIMarshallingTests.boolean_inout_false_true false
    _(res).must_equal true
  end

  it "has a working function #boolean_inout_true_false" do
    res = GIMarshallingTests.boolean_inout_true_false true
    _(res).must_equal false
  end

  it "has a working function #boolean_out_false" do
    res = GIMarshallingTests.boolean_out_false
    _(res).must_equal false
  end

  it "has a working function #boolean_out_true" do
    res = GIMarshallingTests.boolean_out_true
    _(res).must_equal true
  end

  it "has a working function #boolean_return_false" do
    res = GIMarshallingTests.boolean_return_false
    _(res).must_equal false
  end

  it "has a working function #boolean_return_true" do
    res = GIMarshallingTests.boolean_return_true
    _(res).must_equal true
  end

  it "has a working function #boxed_struct_inout" do
    bx = GIMarshallingTests::BoxedStruct.new
    bx.long_ = 42
    res = GIMarshallingTests.boxed_struct_inout bx
    _(res.long_).must_equal 0
  end

  it "has a working function #boxed_struct_out" do
    res = GIMarshallingTests.boxed_struct_out
    _(res.long_).must_equal 42
  end

  it "has a working function #boxed_struct_returnv" do
    res = GIMarshallingTests.boxed_struct_returnv
    _(res.long_).must_equal 42
    _(res.g_strv).must_be :==, %w(0 1 2)
  end

  it "has a working function #bytearray_full_return" do
    ret = GIMarshallingTests.bytearray_full_return
    assert_instance_of GLib::ByteArray, ret
    assert_includes(
      ["0123".bytes.to_a, "\x001\xFF3".bytes.to_a],
      ret.to_string.bytes.to_a)
  end

  it "has a working function #bytearray_none_in" do
    val = GIMarshallingTests.bytearray_full_return.to_string
    ba = GLib::ByteArray.new
    ba = ba.append val
    GIMarshallingTests.bytearray_none_in ba
    pass
  end

  it "has a working function #callback_multiple_out_parameters" do
    result = GIMarshallingTests.callback_multiple_out_parameters do |*_args|
      [12.0, 13.0]
    end
    _(result).must_equal [12.0, 13.0]
  end

  it "has a working function #callback_one_out_parameter" do
    result = GIMarshallingTests.callback_one_out_parameter { 42.0 }
    _(result).must_equal 42.0
  end

  it "has a working function #callback_owned_boxed" do
    a = nil

    callback = proc { |box, _callback_data| a = box.long_ * 2 }

    result = GIMarshallingTests.callback_owned_boxed(&callback)
    _(result).must_equal 1
    _(a).must_equal 2

    result = GIMarshallingTests.callback_owned_boxed(&callback)
    _(result).must_equal 2
    _(a).must_equal 4
  end

  it "has a working function #callback_return_value_and_multiple_out_parameters" do
    result = GIMarshallingTests.callback_return_value_and_multiple_out_parameters do |*_args|
      [42, -142, 3]
    end
    _(result).must_equal [42, -142, 3]
  end

  it "has a working function #callback_return_value_and_one_out_parameter" do
    result = GIMarshallingTests.callback_return_value_and_one_out_parameter do |*_args|
      [42, -142]
    end
    _(result).must_equal [42, -142]
  end

  it "has a working function #callback_return_value_only" do
    result = GIMarshallingTests.callback_return_value_only { 42 }
    _(result).must_equal 42
  end

  it "has a working function #double_in" do
    GIMarshallingTests.double_in Float::MAX
    pass
  end

  it "has a working function #double_inout" do
    ret = GIMarshallingTests.double_inout Float::MAX
    assert_in_epsilon 2.225e-308, ret
  end

  it "has a working function #double_out" do
    ret = GIMarshallingTests.double_out
    _(ret).must_equal Float::MAX
  end

  it "has a working function #double_return" do
    ret = GIMarshallingTests.double_return
    _(ret).must_equal Float::MAX
  end

  it "has a working function #enum_in" do
    GIMarshallingTests.enum_in :value3
    pass
  end

  it "has a working function #enum_inout" do
    e = GIMarshallingTests.enum_inout :value3
    _(e).must_equal :value1
  end

  it "has a working function #enum_out" do
    e = GIMarshallingTests.enum_out
    _(e).must_equal :value3
  end

  it "has a working function #enum_returnv" do
    e = GIMarshallingTests.enum_returnv
    _(e).must_equal :value3
  end

  it "has a working function #filename_list_return" do
    fl = GIMarshallingTests.filename_list_return
    _(fl).must_be_nil
  end

  it "has a working function #flags_in" do
    GIMarshallingTests.flags_in value2: true
    pass
  end

  it "has a working function #flags_in_zero" do
    GIMarshallingTests.flags_in_zero 0
    pass
  end

  it "has a working function #flags_inout" do
    res = GIMarshallingTests.flags_inout value2: true
    _(res).must_equal(value1: true)
  end

  it "has a working function #flags_out" do
    res = GIMarshallingTests.flags_out
    _(res).must_equal(value2: true)
  end

  it "has a working function #flags_returnv" do
    res = GIMarshallingTests.flags_returnv
    _(res).must_equal(value2: true)
  end

  it "has a working function #float_in" do
    # float_return returns MAX_FLT
    flt = GIMarshallingTests.float_return
    GIMarshallingTests.float_in flt
    pass
  end

  it "has a working function #float_inout" do
    # float_return returns MAX_FLT
    flt = GIMarshallingTests.float_return
    res = GIMarshallingTests.float_inout flt
    assert_in_epsilon 1.175e-38, res
  end

  it "has a working function #float_out" do
    flt = GIMarshallingTests.float_out
    assert_in_epsilon 3.402e+38, flt
  end

  it "has a working function #float_return" do
    flt = GIMarshallingTests.float_return
    assert_in_epsilon 3.402e+38, flt
  end

  it "has a working function #garray_bool_none_in" do
    skip_below "1.51.1"
    GIMarshallingTests.garray_bool_none_in [true, false, true, true]
  end

  it "has a working function #garray_boxed_struct_full_return" do
    skip_below "1.61.1"
    result = GIMarshallingTests.garray_boxed_struct_full_return
    _(result.map(&:long_)).must_equal [42, 43, 44]
  end

  it "has a working function #garray_int_none_in" do
    arr = [-1, 0, 1, 2]
    GIMarshallingTests.garray_int_none_in arr
    pass
  end

  it "has a working function #garray_int_none_return" do
    arr = GIMarshallingTests.garray_int_none_return
    _(arr).must_be :==, [-1, 0, 1, 2]
  end

  it "has a working function #garray_uint64_none_in" do
    GIMarshallingTests.garray_uint64_none_in [0, 0xffff_ffff_ffff_ffff]
    pass
  end

  it "has a working function #garray_uint64_none_return" do
    res = GIMarshallingTests.garray_uint64_none_return
    _(res).must_be :==, [0, 0xffff_ffff_ffff_ffff]
  end

  it "has a working function #garray_unichar_none_in" do
    skip_below "1.51.1"
    arr = [0x63, 0x6f, 0x6e, 0x73, 0x74,
           0x20, 0x2665, 0x20, 0x75, 0x74,
           0x66, 0x38]
    GIMarshallingTests.garray_unichar_none_in arr
  end

  it "has a working function #garray_utf8_container_inout" do
    res = GIMarshallingTests.garray_utf8_container_inout %w(0 1 2)
    _(res).must_be :==, ["-2", "-1", "0", "1"]
  end

  it "has a working function #garray_utf8_container_out" do
    res = GIMarshallingTests.garray_utf8_container_out
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #garray_utf8_container_return" do
    res = GIMarshallingTests.garray_utf8_container_return
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #garray_utf8_full_inout" do
    arr = %w(0 1 2)
    res = GIMarshallingTests.garray_utf8_full_inout arr
    _(res).must_be :==, ["-2", "-1", "0", "1"]
  end

  it "has a working function #garray_utf8_full_out" do
    res = GIMarshallingTests.garray_utf8_full_out
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #garray_utf8_full_out_caller_allocated" do
    res = GIMarshallingTests.garray_utf8_full_out_caller_allocated
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #garray_utf8_full_return" do
    res = GIMarshallingTests.garray_utf8_full_return
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #garray_utf8_none_in" do
    arr = %w(0 1 2)
    GIMarshallingTests.garray_utf8_none_in arr
    pass
  end

  it "has a working function #garray_utf8_none_inout" do
    arr = %w(0 1 2)
    res = GIMarshallingTests.garray_utf8_none_inout arr
    _(res).must_be :==, ["-2", "-1", "0", "1"]
  end

  it "has a working function #garray_utf8_none_out" do
    res = GIMarshallingTests.garray_utf8_none_out
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #garray_utf8_none_return" do
    res = GIMarshallingTests.garray_utf8_none_return
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #gbytes_full_return" do
    res = GIMarshallingTests.gbytes_full_return
    _(res.to_a).must_equal [0, 49, 0xFF, 51]
  end

  it "has a working function #gbytes_none_in" do
    GIMarshallingTests.gbytes_none_in [0, 49, 0xFF, 51]
    pass
  end

  it "has a working function #gclosure_in" do
    cl = GObject::RubyClosure.new { 42 }
    GIMarshallingTests.gclosure_in cl
    pass
  end

  it "has a working function #gclosure_return" do
    cl = GIMarshallingTests.gclosure_return
    gv = GObject::Value.wrap_ruby_value 0
    result = cl.invoke gv, []
    _(gv.get_value).must_equal 42
    _(result).must_equal 42
  end

  it "has a working function #genum_in" do
    GIMarshallingTests.genum_in :value3
    pass
  end

  it "has a working function #genum_inout" do
    res = GIMarshallingTests.genum_inout :value3
    _(res).must_equal :value1
  end

  it "has a working function #genum_out" do
    res = GIMarshallingTests.genum_out
    _(res).must_equal :value3
  end

  it "has a working function #genum_returnv" do
    res = GIMarshallingTests.genum_returnv
    _(res).must_equal :value3
  end

  it "has a working function #gerror" do
    begin
      GIMarshallingTests.gerror
      flunk "Error should have been raised"
    rescue GirFFI::GLibError => e
      _(e.message).must_equal GIMarshallingTests::CONSTANT_GERROR_MESSAGE
      _(e.domain).must_equal GIMarshallingTests::CONSTANT_GERROR_DOMAIN
      _(e.code).must_equal GIMarshallingTests::CONSTANT_GERROR_CODE
    end
  end

  it "has a working function #gerror_array_in" do
    begin
      GIMarshallingTests.gerror_array_in [1, 2, 3]
      flunk "Error should have been raised"
    rescue GirFFI::GLibError => e
      _(e.message).must_equal GIMarshallingTests::CONSTANT_GERROR_MESSAGE
      _(e.domain).must_equal GIMarshallingTests::CONSTANT_GERROR_DOMAIN
      _(e.code).must_equal GIMarshallingTests::CONSTANT_GERROR_CODE
    end
  end

  it "has a working function #gerror_out" do
    error, debug = GIMarshallingTests.gerror_out
    _(debug).must_equal GIMarshallingTests::CONSTANT_GERROR_DEBUG_MESSAGE
    _(error.message).must_equal GIMarshallingTests::CONSTANT_GERROR_MESSAGE
  end

  it "has a working function #gerror_out_transfer_none" do
    error, debug = GIMarshallingTests.gerror_out_transfer_none
    _(debug).must_equal GIMarshallingTests::CONSTANT_GERROR_DEBUG_MESSAGE
    _(error.message).must_equal GIMarshallingTests::CONSTANT_GERROR_MESSAGE
  end

  it "has a working function #gerror_return" do
    error = GIMarshallingTests.gerror_return
    _(error.message).must_equal GIMarshallingTests::CONSTANT_GERROR_MESSAGE
  end

  it "has a working function #ghashtable_double_in" do
    skip_below "1.51.2"
    GIMarshallingTests.ghashtable_double_in(
      "-1" => -0.1, "0" => 0.0, "1" => 0.1, "2" => 0.2)
  end

  it "has a working function #ghashtable_float_in" do
    skip_below "1.51.2"
    GIMarshallingTests.ghashtable_float_in(
      "-1" => -0.1, "0" => 0.0, "1" => 0.1, "2" => 0.2)
  end

  it "has a working function #ghashtable_int64_in" do
    skip_below "1.51.2"
    GIMarshallingTests.ghashtable_int64_in(
      "-1" => -1, "0" => 0, "1" => 1, "2" => 0x100000000)
  end

  it "has a working function #ghashtable_int_none_in" do
    GIMarshallingTests.ghashtable_int_none_in(
      -1 => 1, 0 => 0, 1 => -1, 2 => -2)
  end

  it "has a working function #ghashtable_int_none_return" do
    gh = GIMarshallingTests.ghashtable_int_none_return
    assert_equal({ -1 => 1, 0 => 0, 1 => -1, 2 => -2 }, gh.to_hash)
  end

  it "has a working function #ghashtable_uint64_in" do
    skip_below "1.51.2"
    GIMarshallingTests.ghashtable_uint64_in(
      "-1" => 0x100000000, "0" => 0, "1" => 1, "2" => 2)
  end

  it "has a working function #ghashtable_utf8_container_in" do
    skip "This function is defined in the header but not implemented"
  end

  it "has a working function #ghashtable_utf8_container_inout" do
    hsh = { "-1" => "1", "0" => "0", "1" => "-1", "2" => "-2" }
    res = GIMarshallingTests.ghashtable_utf8_container_inout hsh
    assert_equal({ "-1" => "1", "0" => "0", "1" => "1" }, res.to_hash)
  end

  it "has a working function #ghashtable_utf8_container_out" do
    res = GIMarshallingTests.ghashtable_utf8_container_out
    assert_equal({ "-1" => "1", "0" => "0", "1" => "-1", "2" => "-2" },
                 res.to_hash)
  end

  it "has a working function #ghashtable_utf8_container_return" do
    res = GIMarshallingTests.ghashtable_utf8_container_return
    assert_equal({ "-1" => "1", "0" => "0", "1" => "-1", "2" => "-2" },
                 res.to_hash)
  end

  it "has a working function #ghashtable_utf8_full_in" do
    skip "This function is defined in the header but not implemented"
  end

  it "has a working function #ghashtable_utf8_full_inout" do
    hsh = { "-1" => "1", "0" => "0", "1" => "-1", "2" => "-2" }
    res = GIMarshallingTests.ghashtable_utf8_full_inout hsh
    assert_equal({ "-1" => "1", "0" => "0", "1" => "1" }, res.to_hash)
  end

  it "has a working function #ghashtable_utf8_full_out" do
    res = GIMarshallingTests.ghashtable_utf8_full_out
    assert_equal({ "-1" => "1", "0" => "0", "1" => "-1", "2" => "-2" },
                 res.to_hash)
  end

  it "has a working function #ghashtable_utf8_full_return" do
    res = GIMarshallingTests.ghashtable_utf8_full_return
    assert_equal({ "-1" => "1", "0" => "0", "1" => "-1", "2" => "-2" },
                 res.to_hash)
  end

  it "has a working function #ghashtable_utf8_none_in" do
    hsh = { "-1" => "1", "0" => "0", "1" => "-1", "2" => "-2" }
    GIMarshallingTests.ghashtable_utf8_none_in hsh
    pass
  end

  it "has a working function #ghashtable_utf8_none_inout" do
    hsh = { "-1" => "1", "0" => "0", "1" => "-1", "2" => "-2" }
    res = GIMarshallingTests.ghashtable_utf8_none_inout hsh
    assert_equal({ "-1" => "1", "0" => "0", "1" => "1" }, res.to_hash)
  end

  it "has a working function #ghashtable_utf8_none_out" do
    res = GIMarshallingTests.ghashtable_utf8_none_out
    assert_equal({ "-1" => "1", "0" => "0", "1" => "-1", "2" => "-2" },
                 res.to_hash)
  end

  it "has a working function #ghashtable_utf8_none_return" do
    res = GIMarshallingTests.ghashtable_utf8_none_return
    assert_equal({ "-1" => "1", "0" => "0", "1" => "-1", "2" => "-2" },
                 res.to_hash)
  end

  it "has a working function #glist_int_none_in" do
    GIMarshallingTests.glist_int_none_in [-1, 0, 1, 2]
    pass
  end

  it "has a working function #glist_int_none_return" do
    res = GIMarshallingTests.glist_int_none_return
    _(res).must_be :==, [-1, 0, 1, 2]
  end

  it "has a working function #glist_uint32_none_in" do
    GIMarshallingTests.glist_uint32_none_in [0, 0xffff_ffff]
    pass
  end

  it "has a working function #glist_uint32_none_return" do
    res = GIMarshallingTests.glist_uint32_none_return
    _(res).must_be :==, [0, 0xffff_ffff]
  end

  it "has a working function #glist_utf8_container_inout" do
    res = GIMarshallingTests.glist_utf8_container_inout %w(0 1 2)
    _(res).must_be :==, ["-2", "-1", "0", "1"]
  end

  it "has a working function #glist_utf8_container_out" do
    res = GIMarshallingTests.glist_utf8_container_out
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #glist_utf8_container_return" do
    res = GIMarshallingTests.glist_utf8_container_return
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #glist_utf8_full_inout" do
    res = GIMarshallingTests.glist_utf8_full_inout %w(0 1 2)
    _(res).must_be :==, ["-2", "-1", "0", "1"]
  end

  it "has a working function #glist_utf8_full_out" do
    res = GIMarshallingTests.glist_utf8_full_out
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #glist_utf8_full_return" do
    res = GIMarshallingTests.glist_utf8_full_return
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #glist_utf8_none_in" do
    GIMarshallingTests.glist_utf8_none_in %w(0 1 2)
  end

  it "has a working function #glist_utf8_none_inout" do
    res = GIMarshallingTests.glist_utf8_none_inout %w(0 1 2)
    _(res).must_be :==, ["-2", "-1", "0", "1"]
  end

  it "has a working function #glist_utf8_none_out" do
    res = GIMarshallingTests.glist_utf8_none_out
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #glist_utf8_none_return" do
    res = GIMarshallingTests.glist_utf8_none_return
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #gptrarray_boxed_struct_full_return" do
    skip_below "1.61.1"
    result = GIMarshallingTests.gptrarray_boxed_struct_full_return
    _(result.map(&:long_)).must_equal [42, 43, 44]
  end

  it "has a working function #gptrarray_utf8_container_inout" do
    res = GIMarshallingTests.gptrarray_utf8_container_inout %w(0 1 2)
    _(res).must_be :==, ["-2", "-1", "0", "1"]
  end

  it "has a working function #gptrarray_utf8_container_out" do
    res = GIMarshallingTests.gptrarray_utf8_container_out
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #gptrarray_utf8_container_return" do
    res = GIMarshallingTests.gptrarray_utf8_container_return
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #gptrarray_utf8_full_inout" do
    res = GIMarshallingTests.gptrarray_utf8_full_inout %w(0 1 2)
    _(res).must_be :==, ["-2", "-1", "0", "1"]
  end

  it "has a working function #gptrarray_utf8_full_out" do
    res = GIMarshallingTests.gptrarray_utf8_full_out
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #gptrarray_utf8_full_return" do
    res = GIMarshallingTests.gptrarray_utf8_full_return
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #gptrarray_utf8_none_in" do
    GIMarshallingTests.gptrarray_utf8_none_in %w(0 1 2)
  end

  it "has a working function #gptrarray_utf8_none_inout" do
    res = GIMarshallingTests.gptrarray_utf8_none_inout %w(0 1 2)
    _(res).must_be :==, ["-2", "-1", "0", "1"]
  end

  it "has a working function #gptrarray_utf8_none_out" do
    res = GIMarshallingTests.gptrarray_utf8_none_out
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #gptrarray_utf8_none_return" do
    res = GIMarshallingTests.gptrarray_utf8_none_return
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #gslist_int_none_in" do
    GIMarshallingTests.gslist_int_none_in [-1, 0, 1, 2]
    pass
  end

  it "has a working function #gslist_int_none_return" do
    res = GIMarshallingTests.gslist_int_none_return
    _(res).must_be :==, [-1, 0, 1, 2]
  end

  it "has a working function #gslist_utf8_container_inout" do
    res = GIMarshallingTests.gslist_utf8_container_inout %w(0 1 2)
    _(res).must_be :==, ["-2", "-1", "0", "1"]
  end

  it "has a working function #gslist_utf8_container_out" do
    res = GIMarshallingTests.gslist_utf8_container_out
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #gslist_utf8_container_return" do
    res = GIMarshallingTests.gslist_utf8_container_return
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #gslist_utf8_full_inout" do
    res = GIMarshallingTests.gslist_utf8_full_inout %w(0 1 2)
    _(res).must_be :==, ["-2", "-1", "0", "1"]
  end

  it "has a working function #gslist_utf8_full_out" do
    res = GIMarshallingTests.gslist_utf8_full_out
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #gslist_utf8_full_return" do
    res = GIMarshallingTests.gslist_utf8_full_return
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #gslist_utf8_none_in" do
    GIMarshallingTests.gslist_utf8_none_in %w(0 1 2)
    pass
  end

  it "has a working function #gslist_utf8_none_inout" do
    res = GIMarshallingTests.gslist_utf8_none_inout %w(0 1 2)
    _(res).must_be :==, ["-2", "-1", "0", "1"]
  end

  it "has a working function #gslist_utf8_none_out" do
    res = GIMarshallingTests.gslist_utf8_none_out
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #gslist_utf8_none_return" do
    res = GIMarshallingTests.gslist_utf8_none_return
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #gstrv_in" do
    GIMarshallingTests.gstrv_in %w(0 1 2)
    pass
  end

  it "has a working function #gstrv_inout" do
    res = GIMarshallingTests.gstrv_inout %w(0 1 2)
    _(res).must_be :==, ["-1", "0", "1", "2"]
  end

  it "has a working function #gstrv_out" do
    res = GIMarshallingTests.gstrv_out
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #gstrv_return" do
    res = GIMarshallingTests.gstrv_return
    _(res).must_be :==, %w(0 1 2)
  end

  it "has a working function #gtype_in" do
    GIMarshallingTests.gtype_in GObject::TYPE_NONE
    pass
  end

  it "has a working function #gtype_inout" do
    res = GIMarshallingTests.gtype_inout GObject::TYPE_NONE
    _(res).must_equal GObject::TYPE_INT
  end

  it "has a working function #gtype_out" do
    res = GIMarshallingTests.gtype_out
    _(res).must_equal GObject::TYPE_NONE
  end

  it "has a working function #gtype_return" do
    res = GIMarshallingTests.gtype_return
    _(res).must_equal GObject::TYPE_NONE
  end

  it "has a working function #gtype_string_in" do
    GIMarshallingTests.gtype_string_in GObject::TYPE_STRING
    pass
  end

  it "has a working function #gtype_string_out" do
    res = GIMarshallingTests.gtype_string_out
    _(res).must_equal GObject::TYPE_STRING
  end

  it "has a working function #gtype_string_return" do
    res = GIMarshallingTests.gtype_string_return
    _(res).must_equal GObject::TYPE_STRING
  end

  it "has a working function #gvalue_flat_array" do
    GIMarshallingTests.gvalue_flat_array [42, "42", true]
    pass
  end

  it "has a working function #gvalue_flat_array_round_trip" do
    result = GIMarshallingTests.gvalue_flat_array_round_trip 42, "42", true
    arr = result.to_a
    _(arr[0].get_value).must_equal 42
    _(arr[1].get_value).must_equal "42"
    _(arr[2].get_value).must_equal true
  end

  it "has a working function #gvalue_in" do
    GIMarshallingTests.gvalue_in GObject::Value.wrap_ruby_value(42)
    GIMarshallingTests.gvalue_in 42
    pass
  end

  it "has a working function #gvalue_in_enum" do
    gv = GObject::Value.new
    gv.init GIMarshallingTests::GEnum.gtype
    gv.set_enum GIMarshallingTests::GEnum[:value3]
    GIMarshallingTests.gvalue_in_enum gv
    pass
  end

  it "has a working function #gvalue_in_with_modification" do
    gv = GObject::Value.wrap_ruby_value(42)
    GIMarshallingTests.gvalue_in_with_modification gv
    _(gv.get_value).must_equal 24
  end

  it "has a working function #gvalue_in_with_type" do
    gv = GObject::Value.new
    gv.init GIMarshallingTests::SubSubObject.gtype
    GIMarshallingTests.gvalue_in_with_type gv, GIMarshallingTests::Object.gtype
  end

  it "has a working function #gvalue_inout" do
    res = GIMarshallingTests.gvalue_inout GObject::Value.wrap_ruby_value(42)
    _(res).must_equal "42"

    res = GIMarshallingTests.gvalue_inout 42
    _(res).must_equal "42"
  end

  it "has a working function #gvalue_int64_in" do
    gv = GObject::Value.new
    gv.init GObject::TYPE_INT64
    gv.set_value 0x7fff_ffff_ffff_ffff
    GIMarshallingTests.gvalue_int64_in gv
    pass
  end

  it "has a working function #gvalue_int64_out" do
    gv = GIMarshallingTests.gvalue_int64_out
    _(gv).must_equal 0x7fff_ffff_ffff_ffff
  end

  it "has a working function #gvalue_out" do
    res = GIMarshallingTests.gvalue_out
    _(res).must_equal 42
  end

  it "has a working function #gvalue_out_caller_allocates" do
    res = GIMarshallingTests.gvalue_out_caller_allocates
    _(res).must_equal 42
  end

  it "has a working function #gvalue_return" do
    res = GIMarshallingTests.gvalue_return
    _(res).must_equal 42
  end

  it "has a working function #init_function" do
    res, arr = GIMarshallingTests.init_function %w(foo bar baz)
    _(res).must_equal true
    _(arr).must_be :==, %w(foo bar)
  end

  it "has a working function #int16_in_max" do
    GIMarshallingTests.int16_in_max 0x7fff
    pass
  end

  it "has a working function #int16_in_min" do
    GIMarshallingTests.int16_in_min(-0x8000)
    pass
  end

  it "has a working function #int16_inout_max_min" do
    res = GIMarshallingTests.int16_inout_max_min 0x7fff
    assert_equal res, -0x8000
  end

  it "has a working function #int16_inout_min_max" do
    res = GIMarshallingTests.int16_inout_min_max(-0x8000)
    assert_equal 0x7fff, res
  end

  it "has a working function #int16_out_max" do
    res = GIMarshallingTests.int16_out_max
    assert_equal 0x7fff, res
  end

  it "has a working function #int16_out_min" do
    res = GIMarshallingTests.int16_out_min
    assert_equal(-0x8000, res)
  end

  it "has a working function #int16_return_max" do
    res = GIMarshallingTests.int16_return_max
    assert_equal 0x7fff, res
  end

  it "has a working function #int16_return_min" do
    res = GIMarshallingTests.int16_return_min
    assert_equal(-0x8000, res)
  end

  it "has a working function #int32_in_max" do
    GIMarshallingTests.int32_in_max 0x7fffffff
    pass
  end

  it "has a working function #int32_in_min" do
    GIMarshallingTests.int32_in_min(-0x80000000)
    pass
  end

  it "has a working function #int32_inout_max_min" do
    res = GIMarshallingTests.int32_inout_max_min 0x7fffffff
    assert_equal(-0x80000000, res)
  end

  it "has a working function #int32_inout_min_max" do
    res = GIMarshallingTests.int32_inout_min_max(-0x80000000)
    assert_equal 0x7fffffff, res
  end

  it "has a working function #int32_out_max" do
    res = GIMarshallingTests.int32_out_max
    assert_equal 0x7fffffff, res
  end

  it "has a working function #int32_out_min" do
    res = GIMarshallingTests.int32_out_min
    assert_equal(-0x80000000, res)
  end

  it "has a working function #int32_return_max" do
    res = GIMarshallingTests.int32_return_max
    assert_equal 0x7fffffff, res
  end

  it "has a working function #int32_return_min" do
    res = GIMarshallingTests.int32_return_min
    assert_equal(-0x80000000, res)
  end

  it "has a working function #int64_in_max" do
    GIMarshallingTests.int64_in_max 0x7fffffffffffffff
    pass
  end

  it "has a working function #int64_in_min" do
    GIMarshallingTests.int64_in_min(-0x8000000000000000)
    pass
  end

  it "has a working function #int64_inout_max_min" do
    res = GIMarshallingTests.int64_inout_max_min 0x7fffffffffffffff
    assert_equal(-0x8000000000000000, res)
  end

  it "has a working function #int64_inout_min_max" do
    res = GIMarshallingTests.int64_inout_min_max(-0x8000000000000000)
    assert_equal 0x7fffffffffffffff, res
  end

  it "has a working function #int64_out_max" do
    res = GIMarshallingTests.int64_out_max
    assert_equal 0x7fffffffffffffff, res
  end

  it "has a working function #int64_out_min" do
    res = GIMarshallingTests.int64_out_min
    assert_equal(-0x8000000000000000, res)
  end

  it "has a working function #int64_return_max" do
    res = GIMarshallingTests.int64_return_max
    assert_equal 0x7fffffffffffffff, res
  end

  it "has a working function #int64_return_min" do
    res = GIMarshallingTests.int64_return_min
    assert_equal(-0x8000000000000000, res)
  end

  it "has a working function #int8_in_max" do
    GIMarshallingTests.int8_in_max 0x7f
    pass
  end

  it "has a working function #int8_in_min" do
    GIMarshallingTests.int8_in_min(-0x80)
    pass
  end

  it "has a working function #int8_inout_max_min" do
    res = GIMarshallingTests.int8_inout_max_min 0x7f
    assert_equal(-0x80, res)
  end

  it "has a working function #int8_inout_min_max" do
    res = GIMarshallingTests.int8_inout_min_max(-0x80)
    assert_equal 0x7f, res
  end

  it "has a working function #int8_out_max" do
    res = GIMarshallingTests.int8_out_max
    assert_equal 0x7f, res
  end

  it "has a working function #int8_out_min" do
    res = GIMarshallingTests.int8_out_min
    assert_equal(-0x80, res)
  end

  it "has a working function #int8_return_max" do
    res = GIMarshallingTests.int8_return_max
    assert_equal 0x7f, res
  end

  it "has a working function #int8_return_min" do
    res = GIMarshallingTests.int8_return_min
    assert_equal(-0x80, res)
  end

  it "has a working function #int_in_max" do
    GIMarshallingTests.int_in_max 0x7fffffff
    pass
  end

  it "has a working function #int_in_min" do
    GIMarshallingTests.int_in_min(-0x80000000)
    pass
  end

  it "has a working function #int_inout_max_min" do
    res = GIMarshallingTests.int_inout_max_min 0x7fffffff
    assert_equal(-0x80000000, res)
  end

  it "has a working function #int_inout_min_max" do
    res = GIMarshallingTests.int_inout_min_max(-0x80000000)
    assert_equal 0x7fffffff, res
  end

  it "has a working function #int_one_in_utf8_two_in_one_allows_none" do
    GIMarshallingTests.int_one_in_utf8_two_in_one_allows_none 1, "2", "3"
    GIMarshallingTests.int_one_in_utf8_two_in_one_allows_none 1, nil, "3"
    pass
  end

  it "has a working function #int_out_max" do
    res = GIMarshallingTests.int_out_max
    assert_equal 0x7fffffff, res
  end

  it "has a working function #int_out_min" do
    res = GIMarshallingTests.int_out_min
    assert_equal(-0x80000000, res)
  end

  it "has a working function #int_out_out" do
    res = GIMarshallingTests.int_out_out
    assert_equal [6, 7], res
  end

  it "has a working function #int_return_max" do
    res = GIMarshallingTests.int_return_max
    assert_equal 0x7fffffff, res
  end

  it "has a working function #int_return_min" do
    res = GIMarshallingTests.int_return_min
    assert_equal(-0x80000000, res)
  end

  it "has a working function #int_return_out" do
    res = GIMarshallingTests.int_return_out
    assert_equal [6, 7], res
  end

  it "has a working function #int_three_in_three_out" do
    res = GIMarshallingTests.int_three_in_three_out 4, 5, 6
    assert_equal [4, 5, 6], res
  end

  it "has a working function #int_two_in_utf8_two_in_with_allow_none" do
    GIMarshallingTests.int_two_in_utf8_two_in_with_allow_none 1, 2, "3", "4"
    GIMarshallingTests.int_two_in_utf8_two_in_with_allow_none 1, 2, nil, nil
    pass
  end

  it "has a working function #long_in_max" do
    GIMarshallingTests.long_in_max max_long
    pass
  end

  it "has a working function #long_in_min" do
    GIMarshallingTests.long_in_min min_long
    pass
  end

  it "has a working function #long_inout_max_min" do
    res = GIMarshallingTests.long_inout_max_min max_long
    assert_equal min_long, res
  end

  it "has a working function #long_inout_min_max" do
    res = GIMarshallingTests.long_inout_min_max min_long
    assert_equal max_long, res
  end

  it "has a working function #long_out_max" do
    res = GIMarshallingTests.long_out_max
    assert_equal max_long, res
  end

  it "has a working function #long_out_min" do
    res = GIMarshallingTests.long_out_min
    assert_equal min_long, res
  end

  it "has a working function #long_return_max" do
    res = GIMarshallingTests.long_return_max
    assert_equal max_long, res
  end

  it "has a working function #long_return_min" do
    res = GIMarshallingTests.long_return_min
    assert_equal min_long, res
  end

  it "has a working function #multi_array_key_value_in" do
    keys = %w(one two three)
    values = [1, 2, 3].map { |val| GObject::Value.wrap_ruby_value val }
    GIMarshallingTests.multi_array_key_value_in keys, values
  end

  it "has a working function #no_type_flags_in" do
    GIMarshallingTests.no_type_flags_in value2: true
    pass
  end

  it "has a working function #no_type_flags_in_zero" do
    GIMarshallingTests.no_type_flags_in_zero 0
    pass
  end

  it "has a working function #no_type_flags_inout" do
    res = GIMarshallingTests.no_type_flags_inout value2: true
    _(res).must_equal(value1: true)
  end

  it "has a working function #no_type_flags_out" do
    res = GIMarshallingTests.no_type_flags_out
    _(res).must_equal(value2: true)
  end

  it "has a working function #no_type_flags_returnv" do
    res = GIMarshallingTests.no_type_flags_returnv
    _(res).must_equal(value2: true)
  end

  it "has a working function #overrides_struct_returnv" do
    res = GIMarshallingTests.overrides_struct_returnv
    _(res).must_be_instance_of GIMarshallingTests::OverridesStruct
  end

  it "has a working function #param_spec_in_bool" do
    ps = GObject.param_spec_boolean "mybool", "nick", "blurb", true, :readable
    GIMarshallingTests.param_spec_in_bool ps
    pass
  end

  it "has a working function #param_spec_out" do
    res = GIMarshallingTests.param_spec_out
    _(res.value_type).must_equal GObject::TYPE_STRING
    _(res.get_name).must_equal "test-param"
  end

  it "has a working function #param_spec_return" do
    res = GIMarshallingTests.param_spec_return
    _(res.value_type).must_equal GObject::TYPE_STRING
    _(res.get_name).must_equal "test-param"
  end

  it "has a working function #pointer_in_return" do
    ptr = FFI::MemoryPointer.new 1
    res = GIMarshallingTests.pointer_in_return ptr
    assert_equal ptr.address, res.address
  end

  it "has a working function #pointer_struct_get_type" do
    res = GIMarshallingTests.pointer_struct_get_type
    gtype = GObject.type_from_name "GIMarshallingTestsPointerStruct"
    assert_equal gtype, res
  end

  it "has a working function #pointer_struct_returnv" do
    res = GIMarshallingTests.pointer_struct_returnv
    assert_instance_of GIMarshallingTests::PointerStruct, res
    assert_equal 42, res.long_
  end

  it "has a working function #return_gvalue_flat_array" do
    result = GIMarshallingTests.return_gvalue_flat_array
    arr = result.to_a
    _(arr[0].get_value).must_equal 42
    _(arr[1].get_value).must_equal "42"
    _(arr[2].get_value).must_equal true
  end

  it "has a working function #short_in_max" do
    GIMarshallingTests.short_in_max 0x7fff
    pass
  end

  it "has a working function #short_in_min" do
    GIMarshallingTests.short_in_min(-0x8000)
    pass
  end

  it "has a working function #short_inout_max_min" do
    res = GIMarshallingTests.short_inout_max_min 0x7fff
    assert_equal(-0x8000, res)
  end

  it "has a working function #short_inout_min_max" do
    res = GIMarshallingTests.short_inout_min_max(-0x8000)
    assert_equal 0x7fff, res
  end

  it "has a working function #short_out_max" do
    res = GIMarshallingTests.short_out_max
    assert_equal 0x7fff, res
  end

  it "has a working function #short_out_min" do
    res = GIMarshallingTests.short_out_min
    assert_equal(-0x8000, res)
  end

  it "has a working function #short_return_max" do
    res = GIMarshallingTests.short_return_max
    assert_equal 0x7fff, res
  end

  it "has a working function #short_return_min" do
    res = GIMarshallingTests.short_return_min
    assert_equal(-0x8000, res)
  end

  it "has a working function #simple_struct_returnv" do
    res = GIMarshallingTests.simple_struct_returnv
    assert_instance_of GIMarshallingTests::SimpleStruct, res
    assert_equal 6, res.long_
    assert_equal 7, res.int8
  end

  it "has a working function #size_in" do
    GIMarshallingTests.size_in max_size_t
  end

  it "has a working function #size_inout" do
    res = GIMarshallingTests.size_inout max_size_t
    assert_equal 0, res
  end

  it "has a working function #size_out" do
    res = GIMarshallingTests.size_out
    assert_equal max_size_t, res
  end

  it "has a working function #size_return" do
    res = GIMarshallingTests.size_return
    assert_equal max_size_t, res
  end

  it "has a working function #ssize_in_max" do
    GIMarshallingTests.ssize_in_max max_ssize_t
    pass
  end

  it "has a working function #ssize_in_min" do
    GIMarshallingTests.ssize_in_min min_ssize_t
    pass
  end

  it "has a working function #ssize_inout_max_min" do
    res = GIMarshallingTests.ssize_inout_max_min max_ssize_t
    assert_equal min_ssize_t, res
  end

  it "has a working function #ssize_inout_min_max" do
    res = GIMarshallingTests.ssize_inout_min_max min_ssize_t
    assert_equal max_ssize_t, res
  end

  it "has a working function #ssize_out_max" do
    res = GIMarshallingTests.ssize_out_max
    assert_equal max_ssize_t, res
  end

  it "has a working function #ssize_out_min" do
    res = GIMarshallingTests.ssize_out_min
    assert_equal min_ssize_t, res
  end

  it "has a working function #ssize_return_max" do
    res = GIMarshallingTests.ssize_return_max
    assert_equal max_ssize_t, res
  end

  it "has a working function #ssize_return_min" do
    res = GIMarshallingTests.ssize_return_min
    assert_equal min_ssize_t, res
  end

  it "has a working function #test_interface_test_int8_in" do
    derived_klass.class_eval { include GIMarshallingTests::Interface }
    instance = make_derived_instance do |info|
      info.install_vfunc_implementation :test_int8_in, proc { |obj, in_| obj.int = in_ }
    end
    _(instance.int).must_equal 0
    GIMarshallingTests.test_interface_test_int8_in instance, 8
    _(instance.int).must_equal 8
  end

  it "has a working function #time_t_in" do
    GIMarshallingTests.time_t_in 1_234_567_890
    pass
  end

  it "has a working function #time_t_inout" do
    res = GIMarshallingTests.time_t_inout 1_234_567_890
    assert_equal 0, res
  end

  it "has a working function #time_t_out" do
    res = GIMarshallingTests.time_t_out
    assert_equal 1_234_567_890, res
  end

  it "has a working function #time_t_return" do
    res = GIMarshallingTests.time_t_return
    assert_equal 1_234_567_890, res
  end

  it "has a working function #uint16_in" do
    GIMarshallingTests.uint16_in 0xffff
    pass
  end

  it "has a working function #uint16_inout" do
    res = GIMarshallingTests.uint16_inout 0xffff
    assert_equal 0, res
  end

  it "has a working function #uint16_out" do
    res = GIMarshallingTests.uint16_out
    assert_equal 0xffff, res
  end

  it "has a working function #uint16_return" do
    res = GIMarshallingTests.uint16_return
    assert_equal 0xffff, res
  end

  it "has a working function #uint32_in" do
    GIMarshallingTests.uint32_in 0xffffffff
  end

  it "has a working function #uint32_inout" do
    res = GIMarshallingTests.uint32_inout 0xffffffff
    assert_equal 0, res
  end

  it "has a working function #uint32_out" do
    res = GIMarshallingTests.uint32_out
    assert_equal 0xffffffff, res
  end

  it "has a working function #uint32_return" do
    res = GIMarshallingTests.uint32_return
    assert_equal 0xffffffff, res
  end

  it "has a working function #uint64_in" do
    GIMarshallingTests.uint64_in 0xffff_ffff_ffff_ffff
    pass
  end

  it "has a working function #uint64_inout" do
    res = GIMarshallingTests.uint64_inout 0xffff_ffff_ffff_ffff
    assert_equal 0, res
  end

  it "has a working function #uint64_out" do
    res = GIMarshallingTests.uint64_out
    assert_equal 0xffff_ffff_ffff_ffff, res
  end

  it "has a working function #uint64_return" do
    res = GIMarshallingTests.uint64_return
    assert_equal 0xffff_ffff_ffff_ffff, res
  end

  it "has a working function #uint8_in" do
    GIMarshallingTests.uint8_in 0xff
  end

  it "has a working function #uint8_inout" do
    res = GIMarshallingTests.uint8_inout 0xff
    assert_equal 0, res
  end

  it "has a working function #uint8_out" do
    res = GIMarshallingTests.uint8_out
    assert_equal 0xff, res
  end

  it "has a working function #uint8_return" do
    res = GIMarshallingTests.uint8_return
    assert_equal 0xff, res
  end

  it "has a working function #uint_in" do
    GIMarshallingTests.uint_in max_uint
    pass
  end

  it "has a working function #uint_inout" do
    res = GIMarshallingTests.uint_inout max_uint
    assert_equal 0, res
  end

  it "has a working function #uint_out" do
    res = GIMarshallingTests.uint_out
    assert_equal max_uint, res
  end

  it "has a working function #uint_return" do
    res = GIMarshallingTests.uint_return
    assert_equal max_uint, res
  end

  it "has a working function #ulong_in" do
    GIMarshallingTests.ulong_in max_ulong
  end

  it "has a working function #ulong_inout" do
    res = GIMarshallingTests.ulong_inout max_ulong
    assert_equal 0, res
  end

  it "has a working function #ulong_out" do
    res = GIMarshallingTests.ulong_out
    assert_equal max_ulong, res
  end

  it "has a working function #ulong_return" do
    res = GIMarshallingTests.ulong_return
    assert_equal max_ulong, res
  end

  it "has a working function #union_inout" do
    skip "This function is defined in the header but not implemented"
  end

  it "has a working function #union_out" do
    skip "This function is defined in the header but not implemented"
  end

  it "has a working function #union_returnv" do
    res = GIMarshallingTests.union_returnv
    assert_instance_of GIMarshallingTests::Union, res
    assert_equal 42, res.long_
  end

  it "has a working function #ushort_in" do
    GIMarshallingTests.ushort_in max_ushort
    pass
  end

  it "has a working function #ushort_inout" do
    res = GIMarshallingTests.ushort_inout max_ushort
    assert_equal 0, res
  end

  it "has a working function #ushort_out" do
    res = GIMarshallingTests.ushort_out
    assert_equal max_ushort, res
  end

  it "has a working function #ushort_return" do
    res = GIMarshallingTests.ushort_return
    assert_equal max_ushort, res
  end

  it "has a working function #utf8_as_uint8array_in" do
    GIMarshallingTests.utf8_as_uint8array_in GIMarshallingTests::CONSTANT_UTF8.bytes.to_a
    pass
  end

  it "has a working function #utf8_dangling_out" do
    res = GIMarshallingTests.utf8_dangling_out
    assert_nil res
  end

  it "has a working function #utf8_full_in" do
    skip "This function is defined in the header but not implemented"
  end

  it "has a working function #utf8_full_inout" do
    res = GIMarshallingTests.utf8_full_inout "const ♥ utf8"
    assert_equal "", res
  end

  it "has a working function #utf8_full_out" do
    res = GIMarshallingTests.utf8_full_out
    assert_equal "const ♥ utf8", res
  end

  it "has a working function #utf8_full_return" do
    res = GIMarshallingTests.utf8_full_return
    assert_equal "const ♥ utf8", res
  end

  it "has a working function #utf8_none_in" do
    GIMarshallingTests.utf8_none_in "const ♥ utf8"
    pass
  end

  it "has a working function #utf8_none_inout" do
    res = GIMarshallingTests.utf8_none_inout "const ♥ utf8"
    assert_equal "", res
  end

  it "has a working function #utf8_none_out" do
    res = GIMarshallingTests.utf8_none_out
    assert_equal "const ♥ utf8", res
  end

  it "has a working function #utf8_none_return" do
    res = GIMarshallingTests.utf8_none_return
    assert_equal "const ♥ utf8", res
  end
end