require 'spec_helper'

module RandomTopLevelModule
  def self.setup!
    shared_examples_for("top level in module") {}
  end
end

module RSpec::Core
  describe SharedExampleGroup do

    ExampleModule = Module.new
    ExampleClass = Class.new

    it 'does not add a bunch of private methods to Module' do
      seg_methods = RSpec::Core::SharedExampleGroup.private_instance_methods
      expect(Module.private_methods & seg_methods).to eq([])
    end

    module SharedExampleGroup
      describe Registry do
        it "can safely be reset when there aren't any shared groups" do
          expect { Registry.new.clear }.to_not raise_error
        end
      end
    end

    before(:all) do
      # this is a work around as SharedExampleGroup is not world safe
      RandomTopLevelModule.setup!
    end

    %w[share_examples_for shared_examples_for shared_examples shared_context].each do |shared_method_name|
      describe shared_method_name do
        it "is exposed to the global namespace" do
          expect(Kernel).to respond_to(shared_method_name)
        end

        it "displays a warning when adding a second shared example group with the same name" do
          group = ExampleGroup.describe('example group')
          group.send(shared_method_name, 'some shared group') {}
          original_declaration = [__FILE__, __LINE__ - 1].join(':')

          warning = nil
          Kernel.stub(:warn) { |msg| warning = msg }

          group.send(shared_method_name, 'some shared group') {}
          second_declaration = [__FILE__, __LINE__ - 1].join(':')
          expect(warning).to include('some shared group', original_declaration, second_declaration)
        end

        it 'works with top level defined examples in modules' do
          expect(RSpec::configuration.reporter).to_not receive(:deprecation)
          group = ExampleGroup.describe('example group') { include_context 'top level in module' }
        end

        ["name", :name, ExampleModule, ExampleClass].each do |object|
          type = object.class.name.downcase
          context "given a #{type}" do
            it "captures the given #{type} and block in the collection of shared example groups" do
              implementation = lambda {}
              send(shared_method_name, object, &implementation)
              expect(SharedExampleGroup.registry.shared_example_groups[self][object]).to eq implementation
            end
          end
        end

        context "given a hash" do
          it "delegates extend on configuration" do
            implementation = Proc.new { def bar; 'bar'; end }
            send(shared_method_name, :foo => :bar, &implementation)
            a = RSpec.configuration.include_or_extend_modules.first
            expect(a[0]).to eq(:extend)
            expect(Class.new.extend(a[1]).new.bar).to eq('bar')
            expect(a[2]).to eq(:foo => :bar)
          end
        end

        context "given a string and a hash" do
          it "captures the given string and block in the World's collection of shared example groups" do
            implementation = lambda {}
            send(shared_method_name, "name", :foo => :bar, &implementation)
            expect(SharedExampleGroup.registry.shared_example_groups[self]["name"]).to eq implementation
          end

          it "delegates extend on configuration" do
            implementation = Proc.new { def bar; 'bar'; end }
            send(shared_method_name, "name", :foo => :bar, &implementation)
            a = RSpec.configuration.include_or_extend_modules.first
            expect(a[0]).to eq(:extend)
            expect(Class.new.extend(a[1]).new.bar).to eq('bar')
            expect(a[2]).to eq(:foo => :bar)
          end
        end
      end
    end

    describe "#share_as" do
      before { allow(RSpec).to receive(:deprecate) }

      it "is exposed to the global namespace" do
        expect(Kernel).to respond_to("share_as")
      end

      it "adds examples to current example_group using include", :compat => 'rspec-1.2' do
        share_as('Cornucopia') do
          it "is plentiful" do
            expect(5).to eq(4)
          end
        end
        group = ExampleGroup.describe('group') { include Cornucopia }
        phantom_group = group.children.first
        expect(phantom_group.description).to eql("")
        expect(phantom_group.metadata[:shared_group_name]).to eql('Cornucopia')
        expect(phantom_group.examples.length).to eq(1)
        expect(phantom_group.examples.first.metadata[:description]).to eq("is plentiful")
      end
    end
  end
end