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

ruby_version_is "2.3" do
  describe "Module#deprecate_constant" do
    before :each do
      @module = Module.new
      @value = :value
      @module::PUBLIC1 = @value
      @module::PUBLIC2 = @value
      @module::PRIVATE = @value
      @module.private_constant :PRIVATE
      @module.deprecate_constant :PRIVATE
      @pattern = /deprecated/
    end

    describe "when accessing the deprecated module" do
      it "passes the accessing" do
        @module.deprecate_constant :PUBLIC1

        value = nil
        lambda {
          value = @module::PUBLIC1
        }.should complain(@pattern)
        value.should equal(@value)

        lambda { @module::PRIVATE }.should raise_error(NameError)
      end

      it "warns with a message" do
        @module.deprecate_constant :PUBLIC1

        lambda { @module::PUBLIC1 }.should complain(@pattern)
        lambda { @module.const_get :PRIVATE }.should complain(@pattern)
      end
    end

    it "accepts multiple symbols and strings as constant names" do
      @module.deprecate_constant "PUBLIC1", :PUBLIC2

      lambda { @module::PUBLIC1 }.should complain(@pattern)
      lambda { @module::PUBLIC2 }.should complain(@pattern)
    end

    it "returns self" do
      @module.deprecate_constant(:PUBLIC1).should equal(@module)
    end

    it "raises a NameError when given an undefined name" do
      lambda { @module.deprecate_constant :UNDEFINED }.should raise_error(NameError)
    end
  end
end