require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)

ruby_version_is "2.0" do
  describe "Module#prepend_features" do
    it "is a private method" do
      Module.should have_private_instance_method(:prepend_features, true)
    end

    it "gets called when self is included in another module/class" do
      ScratchPad.record []

      m = Module.new do
        def self.prepend_features(mod)
          ScratchPad << mod
        end
      end

      c = Class.new do
        prepend m
      end

      ScratchPad.recorded.should == [c]
    end

    it "raises an ArgumentError on a cyclic prepend" do
      lambda {
        ModuleSpecs::CyclicPrepend.send(:prepend_features, ModuleSpecs::CyclicPrepend)
      }.should raise_error(ArgumentError)
    end

    it "copies own tainted status to the given module" do
      other = Module.new
      Module.new.taint.send :prepend_features, other
      other.tainted?.should be_true
    end

    it "copies own untrusted status to the given module" do
      other = Module.new
      Module.new.untrust.send :prepend_features, other
      other.untrusted?.should be_true
    end

    describe "on Class" do
      ruby_bug "GH-376", "2.0.0.312" do
        it "is undefined" do
          Class.should_not have_private_instance_method(:prepend_features, true)
        end
      end

      it "raises a TypeError if calling after rebinded to Class" do
        lambda {
          Module.instance_method(:prepend_features).bind(Class.new).call Module.new
        }.should raise_error(TypeError)
      end
    end
  end
end
