# Copied from cruby and modified to skip unsupported syntaxes
require 'test/unit'

class TestKeywordArguments < Test::Unit::TestCase
  def f1(str: "foo", num: 424242)
    [str, num]
  end

  def test_f1
    skip %{TypeError: no implicit conversion of NilClass into String}

    assert_equal(["foo", 424242], f1)
    assert_equal(["bar", 424242], f1(str: "bar"))
    assert_equal(["foo", 111111], f1(num: 111111))
    assert_equal(["bar", 111111], f1(str: "bar", num: 111111))
    assert_raise(ArgumentError) { f1(str: "bar", check: true) }
    assert_raise(ArgumentError) { f1("string") }
  end


  def f2(x, str: "foo", num: 424242)
    [x, str, num]
  end

  def test_f2
    assert_equal([:xyz, "foo", 424242], f2(:xyz))
    assert_equal([{"bar"=>42}, "foo", 424242], f2("bar"=>42))
  end


  def f3(str: "foo", num: 424242, **h)
    [str, num, h]
  end

  def test_f3
    assert_equal(["foo", 424242, {}], f3)
    assert_equal(["bar", 424242, {}], f3(str: "bar"))
    assert_equal(["foo", 111111, {}], f3(num: 111111))
    assert_equal(["bar", 111111, {}], f3(str: "bar", num: 111111))
    assert_equal(["bar", 424242, {:check=>true}], f3(str: "bar", check: true))
    assert_raise(ArgumentError) { f3("string") }
  end

  # define_method(:f4) {|str: "foo", num: 424242| [str, num] }
  #
  # def test_f4
  #   assert_equal(["foo", 424242], f4)
  #   assert_equal(["bar", 424242], f4(str: "bar"))
  #   assert_equal(["foo", 111111], f4(num: 111111))
  #   assert_equal(["bar", 111111], f4(str: "bar", num: 111111))
  #   assert_raise(ArgumentError) { f4(str: "bar", check: true) }
  #   assert_raise(ArgumentError) { f4("string") }
  # end

  define_method(:f5) {|str: "foo", num: 424242, **h| [str, num, h] }

  def test_f5
    assert_equal(["foo", 424242, {}], f5)
    assert_equal(["bar", 424242, {}], f5(str: "bar"))
    assert_equal(["foo", 111111, {}], f5(num: 111111))
    assert_equal(["bar", 111111, {}], f5(str: "bar", num: 111111))
    assert_equal(["bar", 424242, {:check=>true}], f5(str: "bar", check: true))
    assert_raise(ArgumentError) { f5("string") }
  end


  def f6(str: "foo", num: 424242, **h, &blk)
    [str, num, h, blk]
  end

  def test_f6 # [ruby-core:40518]
    assert_equal(["foo", 424242, {}, nil], f6)
    assert_equal(["bar", 424242, {}, nil], f6(str: "bar"))
    assert_equal(["foo", 111111, {}, nil], f6(num: 111111))
    assert_equal(["bar", 111111, {}, nil], f6(str: "bar", num: 111111))
    assert_equal(["bar", 424242, {:check=>true}, nil], f6(str: "bar", check: true))
    a = f6 {|x| x + 42 }
    assert_equal(["foo", 424242, {}], a[0, 3])
    assert_equal(43, a.last.call(1))
  end

  def f7(*r, str: "foo", num: 424242, **h)
    [r, str, num, h]
  end

  def test_f7 # [ruby-core:41772]
    assert_equal([[], "foo", 424242, {}], f7)
    assert_equal([[], "bar", 424242, {}], f7(str: "bar"))
    assert_equal([[], "foo", 111111, {}], f7(num: 111111))
    assert_equal([[], "bar", 111111, {}], f7(str: "bar", num: 111111))
    assert_equal([[1], "foo", 424242, {}], f7(1))
    assert_equal([[1, 2], "foo", 424242, {}], f7(1, 2))
    assert_equal([[1, 2, 3], "foo", 424242, {}], f7(1, 2, 3))
    assert_equal([[1], "bar", 424242, {}], f7(1, str: "bar"))
    assert_equal([[1, 2], "bar", 424242, {}], f7(1, 2, str: "bar"))
    assert_equal([[1, 2, 3], "bar", 424242, {}], f7(1, 2, 3, str: "bar"))
  end

  define_method(:f8) { |opt = :ion, *rest, key: :word|
    [opt, rest, key]
  }

  def test_f8
    assert_equal([:ion, [], :word], f8)
    assert_equal([1, [], :word], f8(1))
    assert_equal([1, [2], :word], f8(1, 2))
  end

  # def f9(r, o=42, *args, p, k: :key, **kw, &b)
  #   [r, o, args, p, k, kw, b]
  # end
  #
  # def test_f9
  #   assert_equal([1, 42, [], 2, :key, {}, nil], f9(1, 2))
  #   assert_equal([1, 2, [], 3, :key, {}, nil], f9(1, 2, 3))
  #   assert_equal([1, 2, [3], 4, :key, {}, nil], f9(1, 2, 3, 4))
  #   assert_equal([1, 2, [3, 4], 5, :key, {str: "bar"}, nil], f9(1, 2, 3, 4, 5, str: "bar"))
  # end

  def f10(a: 1, **)
    a
  end

  def test_f10
    assert_equal(42, f10(a: 42))
    assert_equal(1, f10(b: 42))
  end

  def test_method_parameters
    skip %{NoMethodError: undefined method `parameters' for #<Method: TestKeywordArguments#f1>}

    assert_equal([[:key, :str], [:key, :num]], method(:f1).parameters);
    assert_equal([[:req, :x], [:key, :str], [:key, :num]], method(:f2).parameters);
    assert_equal([[:key, :str], [:key, :num], [:keyrest, :h]], method(:f3).parameters);
    assert_equal([[:key, :str], [:key, :num]], method(:f4).parameters);
    assert_equal([[:key, :str], [:key, :num], [:keyrest, :h]], method(:f5).parameters);
    assert_equal([[:key, :str], [:key, :num], [:keyrest, :h], [:block, :blk]], method(:f6).parameters);
    assert_equal([[:rest, :r], [:key, :str], [:key, :num], [:keyrest, :h]], method(:f7).parameters);
    assert_equal([[:opt, :opt], [:rest, :rest], [:key, :key]], method(:f8).parameters) # [Bug #7540] [ruby-core:50735]
    assert_equal([[:req, :r], [:opt, :o], [:rest, :args], [:req, :p], [:key, :k],
                  [:keyrest, :kw], [:block, :b]], method(:f9).parameters)
  end

  def test_lambda
    f = ->(str: "foo", num: 424242) { [str, num] }
    assert_equal(["foo", 424242], f[])
    assert_equal(["bar", 424242], f[str: "bar"])
    assert_equal(["foo", 111111], f[num: 111111])
    assert_equal(["bar", 111111], f[str: "bar", num: 111111])
  end


  # def p1
  #   Proc.new do |str: "foo", num: 424242|
  #     [str, num]
  #   end
  # end
  #
  # def test_p1
  #   assert_equal(["foo", 424242], p1[])
  #   assert_equal(["bar", 424242], p1[str: "bar"])
  #   assert_equal(["foo", 111111], p1[num: 111111])
  #   assert_equal(["bar", 111111], p1[str: "bar", num: 111111])
  #   assert_raise(ArgumentError) { p1[str: "bar", check: true] }
  #   assert_equal(["foo", 424242], p1["string"] )
  # end


  def p2
    Proc.new do |x, str: "foo", num: 424242|
      [x, str, num]
    end
  end

  def test_p2
    assert_equal([nil, "foo", 424242], p2[])
    assert_equal([:xyz, "foo", 424242], p2[:xyz])
  end


  # def p3
  #   Proc.new do |str: "foo", num: 424242, **h|
  #     [str, num, h]
  #   end
  # end
  #
  # def test_p3
  #   assert_equal(["foo", 424242, {}], p3[])
  #   assert_equal(["bar", 424242, {}], p3[str: "bar"])
  #   assert_equal(["foo", 111111, {}], p3[num: 111111])
  #   assert_equal(["bar", 111111, {}], p3[str: "bar", num: 111111])
  #   assert_equal(["bar", 424242, {:check=>true}], p3[str: "bar", check: true])
  #   assert_equal(["foo", 424242, {}], p3["string"])
  # end


  def p4
    Proc.new do |str: "foo", num: 424242, **h, &blk|
      [str, num, h, blk]
    end
  end

  def test_p4
    assert_equal(["foo", 424242, {}, nil], p4[])
    assert_equal(["bar", 424242, {}, nil], p4[str: "bar"])
    assert_equal(["foo", 111111, {}, nil], p4[num: 111111])
    assert_equal(["bar", 111111, {}, nil], p4[str: "bar", num: 111111])
    assert_equal(["bar", 424242, {:check=>true}, nil], p4[str: "bar", check: true])
    a = p4.call {|x| x + 42 }
    assert_equal(["foo", 424242, {}], a[0, 3])
    assert_equal(43, a.last.call(1))
  end


  def p5
    Proc.new do |*r, str: "foo", num: 424242, **h|
      [r, str, num, h]
    end
  end

  def test_p5
    assert_equal([[], "foo", 424242, {}], p5[])
    assert_equal([[], "bar", 424242, {}], p5[str: "bar"])
    assert_equal([[], "foo", 111111, {}], p5[num: 111111])
    assert_equal([[], "bar", 111111, {}], p5[str: "bar", num: 111111])
    assert_equal([[1], "foo", 424242, {}], p5[1])
    assert_equal([[1, 2], "foo", 424242, {}], p5[1, 2])
    assert_equal([[1, 2, 3], "foo", 424242, {}], p5[1, 2, 3])
    assert_equal([[1], "bar", 424242, {}], p5[1, str: "bar"])
    assert_equal([[1, 2], "bar", 424242, {}], p5[1, 2, str: "bar"])
    assert_equal([[1, 2, 3], "bar", 424242, {}], p5[1, 2, 3, str: "bar"])
  end


  # def p6
  #   Proc.new do |o1, o2=42, *args, p, k: :key, **kw, &b|
  #     [o1, o2, args, p, k, kw, b]
  #   end
  # end
  #
  # def test_p6
  #   assert_equal([nil, 42, [], nil, :key, {}, nil], p6[])
  #   assert_equal([1, 42, [], 2, :key, {}, nil], p6[1, 2])
  #   assert_equal([1, 2, [], 3, :key, {}, nil], p6[1, 2, 3])
  #   assert_equal([1, 2, [3], 4, :key, {}, nil], p6[1, 2, 3, 4])
  #   assert_equal([1, 2, [3, 4], 5, :key, {str: "bar"}, nil], p6[1, 2, 3, 4, 5, str: "bar"])
  # end
  #
  # def test_proc_parameters
  #   assert_equal([[:key, :str], [:key, :num]], p1.parameters);
  #   assert_equal([[:opt, :x], [:key, :str], [:key, :num]], p2.parameters);
  #   assert_equal([[:key, :str], [:key, :num], [:keyrest, :h]], p3.parameters);
  #   assert_equal([[:key, :str], [:key, :num], [:keyrest, :h], [:block, :blk]], p4.parameters);
  #   assert_equal([[:rest, :r], [:key, :str], [:key, :num], [:keyrest, :h]], p5.parameters);
  #   assert_equal([[:opt, :o1], [:opt, :o2], [:rest, :args], [:opt, :p], [:key, :k],
  #                 [:keyrest, :kw], [:block, :b]], p6.parameters)
  # end

  def m1(*args)
    yield(*args)
  end

  def test_block
    blk = Proc.new {|str: "foo", num: 424242| [str, num] }
    assert_equal(["foo", 424242], m1(&blk))
    assert_equal(["bar", 424242], m1(str: "bar", &blk))
    assert_equal(["foo", 111111], m1(num: 111111, &blk))
    assert_equal(["bar", 111111], m1(str: "bar", num: 111111, &blk))
  end

  # def rest_keyrest(*args, **opt)
  #   return *args, opt
  # end
  #
  # def test_rest_keyrest
  #   bug7665 = '[ruby-core:51278]'
  #   bug8463 = '[ruby-core:55203] [Bug #8463]'
  #   expect = [*%w[foo bar], {zzz: 42}]
  #   assert_equal(expect, rest_keyrest(*expect), bug7665)
  #   pr = proc {|*args, **opt| next *args, opt}
  #   assert_equal(expect, pr.call(*expect), bug7665)
  #   assert_equal(expect, pr.call(expect), bug8463)
  #   pr = proc {|a, *b, **opt| next a, *b, opt}
  #   assert_equal(expect, pr.call(expect), bug8463)
  #   pr = proc {|a, **opt| next a, opt}
  #   assert_equal(expect.values_at(0, -1), pr.call(expect), bug8463)
  # end

  def test_bare_kwrest
    skip "NoMethodError: undefined method `assert_valid_syntax' for TestKeywordArguments#test_bare_kwrest"
    # valid syntax, but its semantics is undefined
    assert_valid_syntax("def bug7662(**) end")
    assert_valid_syntax("def bug7662(*, **) end")
    assert_valid_syntax("def bug7662(a, **) end")
  end

  def test_without_paren
    skip %{NoMethodError: undefined method `assert_valid_syntax' for TestKeywordArguments#test_without_paren}

    bug7942 = '[ruby-core:52820] [Bug #7942]'
    assert_valid_syntax("def bug7942 a: 1; end")
    assert_valid_syntax("def bug7942 a: 1, **; end")

    o = Object.new
    eval("def o.bug7942 a: 1; a; end", nil, __FILE__, __LINE__)
    assert_equal(1, o.bug7942(), bug7942)
    assert_equal(42, o.bug7942(a: 42), bug7942)

    o = Object.new
    eval("def o.bug7942 a: 1, **; a; end", nil, __FILE__, __LINE__)
    assert_equal(1, o.bug7942(), bug7942)
    assert_equal(42, o.bug7942(a: 42), bug7942)
  end

  def test_required_keyword
    skip %{ArgumentError: [TestKeywordArguments#eval] wrong number of arguments(3 for 1)}

    feature7701 = '[ruby-core:51454] [Feature #7701] required keyword argument'
    o = Object.new
    assert_nothing_raised(SyntaxError, feature7701) do
      eval("def o.foo(a:) a; end", nil, "xyzzy")
      eval("def o.bar(a:,**b) [a, b]; end")
    end
    assert_raise_with_message(ArgumentError, /missing keyword/, feature7701) {o.foo}
    assert_raise_with_message(ArgumentError, /unknown keyword/, feature7701) {o.foo(a:0, b:1)}
    begin
      o.foo(a: 0, b: 1)
    rescue => e
      assert_equal('xyzzy', e.backtrace_locations[0].path)
    end
    assert_equal(42, o.foo(a: 42), feature7701)
    assert_equal([[:keyreq, :a]], o.method(:foo).parameters, feature7701)

    bug8139 = '[ruby-core:53608] [Bug #8139] required keyword argument with rest hash'
    assert_equal([42, {}], o.bar(a: 42), feature7701)
    assert_equal([42, {c: feature7701}], o.bar(a: 42, c: feature7701), feature7701)
    assert_equal([[:keyreq, :a], [:keyrest, :b]], o.method(:bar).parameters, feature7701)
    assert_raise_with_message(ArgumentError, /missing keyword/, bug8139) {o.bar(c: bug8139)}
    assert_raise_with_message(ArgumentError, /missing keyword/, bug8139) {o.bar}
  end

  # def test_required_keyword_with_newline
  #   bug9669 = '[ruby-core:61658] [Bug #9669]'
  #   assert_nothing_raised(SyntaxError, bug9669) do
  #     eval(<<-'end;', nil, __FILE__, __LINE__)
  #       def bug9669.foo a:
  #         return a
  #       end
  #     end;
  #   end
  #   assert_equal(42, bug9669.foo(a: 42))
  #   o = nil
  #   assert_nothing_raised(SyntaxError, bug9669) do
  #     eval(<<-'end;', nil, __FILE__, __LINE__)
  #       o = {
  #         a:
  #         1
  #       }
  #     end;
  #   end
  #   assert_equal({a: 1}, o, bug9669)
  # end
  #
  # def test_required_keyword_with_reserved
  #   bug10279 = '[ruby-core:65211] [Bug #10279]'
  #   h = nil
  #   assert_nothing_raised(SyntaxError, bug10279) do
  #     break eval(<<-'end;', nil, __FILE__, __LINE__)
  #       h = {a: if true then 42 end}
  #     end;
  #   end
  #   assert_equal({a: 42}, h, bug10279)
  # end

  def test_block_required_keyword
    skip "ArgumentError: [TestKeywordArguments#eval] wrong number of arguments(4 for 1)"

    feature7701 = '[ruby-core:51454] [Feature #7701] required keyword argument'
    b = assert_nothing_raised(SyntaxError, feature7701) do
      break eval("proc {|a:| a}", nil, 'xyzzy', __LINE__)
    end
    assert_raise_with_message(ArgumentError, /missing keyword/, feature7701) {b.call}
    assert_raise_with_message(ArgumentError, /unknown keyword/, feature7701) {b.call(a:0, b:1)}
    begin
      b.call(a: 0, b: 1)
    rescue => e
      assert_equal('xyzzy', e.backtrace_locations[0].path)
    end

    assert_equal(42, b.call(a: 42), feature7701)
    assert_equal([[:keyreq, :a]], b.parameters, feature7701)

    bug8139 = '[ruby-core:53608] [Bug #8139] required keyword argument with rest hash'
    b = assert_nothing_raised(SyntaxError, feature7701) do
      break eval("proc {|a:, **bl| [a, bl]}", nil, __FILE__, __LINE__)
    end
    assert_equal([42, {}], b.call(a: 42), feature7701)
    assert_equal([42, {c: feature7701}], b.call(a: 42, c: feature7701), feature7701)
    assert_equal([[:keyreq, :a], [:keyrest, :bl]], b.parameters, feature7701)
    assert_raise_with_message(ArgumentError, /missing keyword/, bug8139) {b.call(c: bug8139)}
    assert_raise_with_message(ArgumentError, /missing keyword/, bug8139) {b.call}
  end

  def test_super_with_keyword
    skip %{NoMethodError: undefined method `encode' for "[42, {\"bar\"=>\"x\"}]":String}
    bug8236 = '[ruby-core:54094] [Bug #8236]'
    base = Class.new do
      def foo(*args)
        args
      end
    end
    a = Class.new(base) do
      def foo(arg, bar: 'x')
        super
      end
    end
    b = Class.new(base) do
      def foo(*args, bar: 'x')
        super
      end
    end
    assert_equal([42, {:bar=>"x"}], a.new.foo(42), bug8236)
    assert_equal([42, {:bar=>"x"}], b.new.foo(42), bug8236)
  end

  def test_zsuper_only_named_kwrest
    bug8416 = '[ruby-core:55033] [Bug #8416]'
    base = Class.new do
      def foo(**h)
        h
      end
    end
    a = Class.new(base) do
      def foo(**h)
        super
      end
    end
    assert_equal({:bar=>"x"}, a.new.foo(bar: "x"), bug8416)
  end

  def test_zsuper_only_anonymous_kwrest
    bug8416 = '[ruby-core:55033] [Bug #8416]'
    base = Class.new do
      def foo(**h)
        h
      end
    end
    a = Class.new(base) do
      def foo(**)
        super
      end
    end
    assert_equal({:bar=>"x"}, a.new.foo(bar: "x"), bug8416)
  end

  def test_precedence_of_keyword_arguments
    bug8040 = '[ruby-core:53199] [Bug #8040]'
    a = Class.new do
      def foo(x, **h)
        [x, h]
      end
    end
    assert_equal([{}, {}], a.new.foo({}))
    assert_equal([{}, {:bar=>"x"}], a.new.foo({}, bar: "x"), bug8040)
  end

  # def test_precedence_of_keyword_arguments_with_post_argument
  #   bug8993 = '[ruby-core:57706] [Bug #8993]'
  #   a = Class.new do
  #     def foo(a, b, c=1, *d, e, f:2, **g)
  #       [a, b, c, d, e, f, g]
  #     end
  #   end
  #   assert_equal([1, 2, 1, [], {:f=>5}, 2, {}], a.new.foo(1, 2, f:5), bug8993)
  # end
  #
  # def test_splat_keyword_nondestructive
  #   bug9776 = '[ruby-core:62161] [Bug #9776]'
  #
  #   h = {a: 1}
  #   assert_equal({a:1, b:2}, {**h, b:2})
  #   assert_equal({a:1}, h, bug9776)
  #
  #   pr = proc {|**opt| next opt}
  #   assert_equal({a: 1}, pr.call(**h))
  #   assert_equal({a: 1, b: 2}, pr.call(**h, b: 2))
  #   assert_equal({a: 1}, h, bug9776)
  # end
  #
  # def test_splat_hash_conversion
  #   bug9898 = '[ruby-core:62921] [Bug #9898]'
  #
  #   o = Object.new
  #   def o.to_hash() { a: 1 } end
  #   assert_equal({a: 1}, m1(**o) {|x| break x}, bug9898)
  #   o2 = Object.new
  #   def o2.to_hash() { b: 2 } end
  #   assert_equal({a: 1, b: 2}, m1(**o, **o2) {|x| break x}, bug9898)
  # end
  #
  # def test_implicit_hash_conversion
  #   bug10016 = '[ruby-core:63593] [Bug #10016]'
  #
  #   o = Object.new
  #   def o.to_hash() { k: 9 } end
  #   assert_equal([1, 42, [], o, :key, {}, nil], f9(1, o))
  #   assert_equal([1, 9], m1(1, o) {|a, k: 0| break [a, k]}, bug10016)
  #   assert_equal([1, 9], m1(1, o, &->(a, k: 0) {break [a, k]}), bug10016)
  # end
  #
  # def test_gced_object_in_stack
  #   bug8964 = '[ruby-dev:47729] [Bug #8964]'
  #   assert_normal_exit %q{
  #     def m(a: [])
  #     end
  #     GC.stress = true
  #     tap { m }
  #     GC.start
  #     tap { m }
  #   }, bug8964
  #   assert_normal_exit %q{
  #     prc = Proc.new {|a: []|}
  #     GC.stress = true
  #     tap { prc.call }
  #     GC.start
  #     tap { prc.call }
  #   }, bug8964
  # end
  #
  # def test_dynamic_symbol_keyword
  #   bug10266 = '[ruby-dev:48564] [Bug #10266]'
  #   assert_separately(['-', bug10266], <<-'end;') #    do
  #     bug = ARGV.shift
  #     "hoge".to_sym
  #     assert_nothing_raised(bug) {eval("def a(hoge:); end")}
  #   end;
  # end
  #
  # def test_unknown_keyword_with_block
  #   bug10413 = '[ruby-core:65837] [Bug #10413]'
  #   class << (o = Object.new)
  #     def bar(k2: 'v2')
  #     end
  #
  #     def foo
  #       bar(k1: 1)
  #     end
  #   end
  #   assert_raise_with_message(ArgumentError, /unknown keyword: k1/, bug10413) {
  #     o.foo {raise "unreachable"}
  #   }
  # end
  #
  # def test_super_with_anon_restkeywords
  #   bug10659 = '[ruby-core:67157] [Bug #10659]'
  #
  #   foo = Class.new do
  #     def foo(**h)
  #       h
  #     end
  #   end
  #
  #   class << (obj = foo.new)
  #     def foo(bar: "bar", **)
  #       super
  #     end
  #   end
  #
  #   assert_nothing_raised(TypeError, bug10659) {
  #     assert_equal({:bar => "bar"}, obj.foo, bug10659)
  #   }
  # end

  def m(a) yield a end

  # def test_nonsymbol_key
  #   result = m(["a" => 10]) { |a = nil, **b| [a, b] }
  #   assert_equal([{"a" => 10}, {}], result)
  # end

  def method_for_test_to_hash_call_during_setup_complex_parameters k1:, k2:, **rest_kw
    [k1, k2, rest_kw]
  end

  def test_to_hash_call_during_setup_complex_parameters
    sym = "sym_#{Time.now}".to_sym
    h = method_for_test_to_hash_call_during_setup_complex_parameters k1: "foo", k2: "bar", sym => "baz"
    assert_equal ["foo", "bar", {sym => "baz"}], h, '[Bug #11027]'
  end
end