require 'spec_helper'

describe RSpec::Core::Example, :parent_metadata => 'sample' do
  let(:example_group) do
    RSpec::Core::ExampleGroup.describe('group description')
  end

  let(:example_instance) do
    example_group.example('example description')
  end

  it_behaves_like "metadata hash builder" do
    def metadata_hash(*args)
      example = example_group.example('example description', *args)
      example.metadata
    end
  end

  describe "auto-generated example descriptions" do
    let(:generated_description) { "the generated description" }
    let(:rspec_example) { example_group.specify { 5.should == 5 } }
    before(:each) { RSpec::Matchers.stub(:generated_description => generated_description) }

    def expect_with(*frameworks)
      RSpec.configuration.stub(:expecting_with_rspec?).and_return(frameworks.include?(:rspec))

      if frameworks.include?(:stdlib)
        example_group.class_eval do
          def assert(val)
            raise "Expected #{val} to be true" unless val
          end
        end
      end
    end

    context "when `expect_with :rspec` is configured" do
      before(:each) { expect_with :rspec }

      it "generates a description for an example with no description" do
        expect {
          example_group.run
        }.to change { rspec_example.metadata[:description] }.from("").to(generated_description)
      end
    end

    context "when `expect_with :rspec, :stdlib` is configured" do
      before(:each) { expect_with :rspec, :stdlib }

      it "generates a description for an example with no description" do
        expect {
          example_group.run
        }.to change { rspec_example.metadata[:description] }.from("").to(generated_description)
      end
    end

    context "when `expect_with :stdlib` is configured" do
      let!(:stdlib_example) { example_group.specify { assert 5 == 5 } }
      before(:each) { expect_with :stdlib }

      it "does not attempt to get the generated description from RSpec::Matchers" do
        RSpec::Matchers.should_not_receive(:generated_description)
        example_group.run
      end

      it "fails an example with no description" do
        example_group.run
        stdlib_example.should have_failed_with(NotImplementedError)
      end
    end
  end

  describe '#described_class' do
    it "returns the class (if any) of the outermost example group" do
      described_class.should == RSpec::Core::Example
    end
  end

  describe "accessing metadata within a running example" do
    it "has a reference to itself when running" do
      example.description.should == "has a reference to itself when running"
    end

    it "can access the example group's top level metadata as if it were its own" do
      example.example_group.metadata.should include(:parent_metadata => 'sample')
      example.metadata.should include(:parent_metadata => 'sample')
    end
  end

  describe "accessing options within a running example" do
    it "can look up option values by key", :demo => :data do
      example.options[:demo].should == :data
    end
  end

  describe "#run" do
    it "sets its reference to the example group instance to nil" do
      group = RSpec::Core::ExampleGroup.describe do
        example('example') { 1.should eq(1) }
      end
      group.run
      group.examples.first.instance_variable_get("@example_group_instance").should be_nil
    end

    it "runs after(:each) when the example passes" do
      after_run = false
      group = RSpec::Core::ExampleGroup.describe do
        after(:each) { after_run = true }
        example('example') { 1.should == 1 }
      end
      group.run
      after_run.should be_true, "expected after(:each) to be run"
    end

    it "runs after(:each) when the example fails" do
      after_run = false
      group = RSpec::Core::ExampleGroup.describe do
        after(:each) { after_run = true }
        example('example') { 1.should == 2 }
      end
      group.run
      after_run.should be_true, "expected after(:each) to be run"
    end

    it "runs after(:each) when the example raises an Exception" do
      after_run = false
      group = RSpec::Core::ExampleGroup.describe do
        after(:each) { after_run = true }
        example('example') { raise "this error" }
      end
      group.run
      after_run.should be_true, "expected after(:each) to be run"
    end

    context "with an after(:each) that raises" do
      it "runs subsequent after(:each)'s" do
        after_run = false
        group = RSpec::Core::ExampleGroup.describe do
          after(:each) { after_run = true }
          after(:each) { raise "FOO" }
          example('example') { 1.should == 1 }
        end
        group.run
        after_run.should be_true, "expected after(:each) to be run"
      end

      it "stores the exception" do
        group = RSpec::Core::ExampleGroup.describe
        group.after(:each) { raise "FOO" }
        example = group.example('example') { 1.should == 1 }

        group.run

        example.metadata[:execution_result][:exception].message.should == "FOO"
      end
    end

    it "wraps before/after(:each) inside around" do
      results = []
      group = RSpec::Core::ExampleGroup.describe do
        around(:each) do |e|
          results << "around (before)"
          e.run
          results << "around (after)"
        end
        before(:each) { results << "before" }
        after(:each) { results << "after" }
        example { results << "example" }
      end

      group.run
      results.should eq([
        "around (before)",
        "before",
        "example",
        "after",
        "around (after)"
      ])
    end

    context "clearing ivars" do
      it "sets ivars to nil to prep them for GC" do
        group = RSpec::Core::ExampleGroup.describe do
          before(:all)  { @before_all  = :before_all }
          before(:each) { @before_each = :before_each }
          after(:each)  { @after_each = :after_each }
          after(:all)   { @after_all  = :after_all }
        end
        example = group.example("does something") do
          @in_example = :in_example
        end
        example_group_instance = group.new
        example.run(example_group_instance, double('reporter').as_null_object)

        %w[@before_all @before_each @after_each @after_all].each do |ivar|
          example_group_instance.instance_variable_get(ivar).should be_nil
        end
      end

      it "does not impact the before_all_ivars which are copied to each example" do
        group = RSpec::Core::ExampleGroup.describe do
          before(:all) { @before_all = "abc" }
          example("first") { @before_all.should_not be_nil }
          example("second") { @before_all.should_not be_nil }
        end
        group.run.should be_true
      end
    end
  end

  describe "#pending" do
    context "in the example" do
      it "sets the example to pending" do
        group = RSpec::Core::ExampleGroup.describe do
          example { pending }
        end
        group.run
        group.examples.first.should be_pending
      end

      it "allows post-example processing in around hooks (see https://github.com/rspec/rspec-core/issues/322)" do
        blah = nil
        group = RSpec::Core::ExampleGroup.describe do
          around do |example|
            example.run
            blah = :success
          end
          example { pending }
        end
        group.run
        blah.should be(:success)
      end
    end
      
    context "in before(:each)" do
      it "sets each example to pending" do
        group = RSpec::Core::ExampleGroup.describe do
          before(:each) { pending }
          example {}
          example {}
        end
        group.run
        group.examples.first.should be_pending
        group.examples.last.should be_pending
      end
    end

    context "in before(:all)" do
      it "sets each example to pending" do
        group = RSpec::Core::ExampleGroup.describe do
          before(:all) { pending }
          example {}
          example {}
        end
        group.run
        group.examples.first.should be_pending
        group.examples.last.should be_pending
      end
    end

    context "in around(:each)" do
      it "sets the example to pending" do
        group = RSpec::Core::ExampleGroup.describe do
          around(:each) { pending }
          example {}
        end
        group.run
        group.examples.first.should be_pending
      end
    end

  end
end