require_relative '../../spec_helper'
require_relative 'fixtures/classes'

describe "Module#instance_methods" do
  it "does not return methods undefined in a superclass" do
    methods = ModuleSpecs::Parent.instance_methods(false)
    methods.should_not.include?(:undefed_method)
  end

  it "only includes module methods on an included module" do
    methods = ModuleSpecs::Basic.instance_methods(false)
    methods.should.include?(:public_module)
    # Child is an including class
    methods = ModuleSpecs::Child.instance_methods(false)
    methods.should.include?(:public_child)
    methods.should_not.include?(:public_module)
  end

  it "does not return methods undefined in a subclass" do
    methods = ModuleSpecs::Grandchild.instance_methods
    methods.should_not.include?(:parent_method)
    methods.should_not.include?(:another_parent_method)
  end

  it "does not return methods undefined in the current class" do
    class ModuleSpecs::Child
      def undefed_child
      end
    end
    ModuleSpecs::Child.send(:undef_method, :undefed_child)
    methods = ModuleSpecs::Child.instance_methods
    methods.should_not.include?(:undefed_method)
    methods.should_not.include?(:undefed_child)
  end

  it "does not return methods from an included module that are undefined in the class" do
    ModuleSpecs::Grandchild.instance_methods.should_not.include?(:super_included_method)
  end

  it "returns the public and protected methods of self if include_super is false" do
    methods = ModuleSpecs::Parent.instance_methods(false)
    methods.to_set.should >= Set[:protected_parent, :public_parent]

    methods = ModuleSpecs::Child.instance_methods(false)
    methods.to_set.should >= Set[:protected_child, :public_child]
  end

  it "returns the public and protected methods of self and it's ancestors" do
    methods = ModuleSpecs::Basic.instance_methods
    methods.to_set.should >= Set[:protected_module, :public_module]

    methods = ModuleSpecs::Super.instance_methods
    methods.to_set.should >= Set[:protected_module, :protected_super_module,
                                 :public_module, :public_super_module]
  end

  it "makes a private Object instance method public in Kernel" do
    methods = Kernel.instance_methods
    methods.should.include?(:module_specs_private_method_on_object_for_kernel_public)
    methods = Object.instance_methods
    methods.should_not.include?(:module_specs_private_method_on_object_for_kernel_public)
  end
end