* test/test_forwardable.rb: Write basic tests for lib/forwardable.

[fix GH-1035] Patch by @kachick

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51959 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Mon Sep 28 10:31:12 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
+
+	* test/test_forwardable.rb: Write basic tests for lib/forwardable.
+	  [fix GH-1035] Patch by @kachick
+
 Sun Sep 27 23:32:46 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* class.c (rb_define_class, rb_define_class_id_under): refine

test/test_forwardable.rb

@@ -0,0 +1,120 @@
+require 'test/unit'
+require 'forwardable'
+
+class TestForwardable < Test::Unit::TestCase
+  RECEIVER = BasicObject.new
+  RETURNED1 = BasicObject.new
+  RETURNED2 = BasicObject.new
+
+  class << RECEIVER
+    def delegated1
+      RETURNED1
+    end
+
+    def delegated2
+      RETURNED2
+    end
+  end
+
+  def test_def_instance_delegator
+    %i[def_delegator def_instance_delegator].each do |m|
+      cls = forwardable_class do
+        __send__ m, :@receiver, :delegated1
+      end
+
+      assert_same RETURNED1, cls.new.delegated1
+    end
+  end
+
+  def test_def_instance_delegators
+    %i[def_delegators def_instance_delegators].each do |m|
+      cls = forwardable_class do
+        __send__ m, :@receiver, :delegated1, :delegated2
+      end
+
+      assert_same RETURNED1, cls.new.delegated1
+      assert_same RETURNED2, cls.new.delegated2
+    end
+  end
+
+  def test_instance_delegate
+    %i[delegate instance_delegate].each do |m|
+      cls = forwardable_class do
+        __send__ m, delegated1: :@receiver, delegated2: :@receiver
+      end
+
+      assert_same RETURNED1, cls.new.delegated1
+      assert_same RETURNED2, cls.new.delegated2
+
+      cls = forwardable_class do
+        __send__ m, %i[delegated1 delegated2] => :@receiver
+      end
+
+      assert_same RETURNED1, cls.new.delegated1
+      assert_same RETURNED2, cls.new.delegated2
+    end
+  end
+
+  def test_def_single_delegator
+    %i[def_delegator def_single_delegator].each do |m|
+      cls = single_forwardable_class do
+        __send__ m, :@receiver, :delegated1
+      end
+
+      assert_same RETURNED1, cls.delegated1
+    end
+  end
+
+  def test_def_single_delegators
+    %i[def_delegators def_single_delegators].each do |m|
+      cls = single_forwardable_class do
+        __send__ m, :@receiver, :delegated1, :delegated2
+      end
+
+      assert_same RETURNED1, cls.delegated1
+      assert_same RETURNED2, cls.delegated2
+    end
+  end
+
+  def test_single_delegate
+    %i[delegate single_delegate].each do |m|
+      cls = single_forwardable_class do
+        __send__ m, delegated1: :@receiver, delegated2: :@receiver
+      end
+
+      assert_same RETURNED1, cls.delegated1
+      assert_same RETURNED2, cls.delegated2
+
+      cls = single_forwardable_class do
+        __send__ m, %i[delegated1 delegated2] => :@receiver
+      end
+
+      assert_same RETURNED1, cls.delegated1
+      assert_same RETURNED2, cls.delegated2
+    end
+  end
+
+  private
+
+  def forwardable_class(&block)
+    Class.new do
+      extend Forwardable
+
+      def initialize
+        @receiver = RECEIVER
+      end
+
+      class_exec(&block)
+    end
+  end
+
+  def single_forwardable_class(&block)
+    Class.new do
+      extend SingleForwardable
+
+      @receiver = RECEIVER
+
+      class_exec(&block)
+    end
+  end
+end