require 'spec_helper'

module Rspec::Core

  describe ExampleGroupSubject do

    describe "implicit subject" do
      describe "with a class" do
        it "returns an instance of the class" do
          ExampleGroup.create(Array).subject.call.should == []
        end
      end
      
      describe "with a Module" do
        it "returns the Module" do
          ExampleGroup.create(Enumerable).subject.call.should == Enumerable
        end
      end
      
      describe "with a string" do
        it "return the string" do
          ExampleGroup.create("Foo").subject.call.should == 'Foo'
        end
      end

      describe "with a number" do
        it "returns the number" do
          ExampleGroup.create(15).subject.call.should == 15
        end
      end
      
    end
    
    describe "explicit subject" do
      describe "defined in a top level group" do
        it "replaces the implicit subject in that group" do
          group = ExampleGroup.create(Array)
          group.subject { [1,2,3] }
          group.subject.call.should == [1,2,3]
        end
      end

      describe "defined in a top level group" do
        let(:group) do
          ExampleGroup.create do
            subject{ [4,5,6] }
          end
        end

        it "is available in a nested group (subclass)" do
          nested_group = group.describe("I'm nested!") { }
          nested_group.subject.call.should == [4,5,6]
        end

        it "is available in a doubly nested group (subclass)" do
          nested_group = group.describe("Nesting level 1") { }
          doubly_nested_group = nested_group.describe("Nesting level 2") { }
          doubly_nested_group.subject.call.should == [4,5,6]
        end
      end
    end
  end
end