`Module#alias_method` should return `self` in ISO standard

1 files changed, 11 insertions, 0 deletions

diff --git a/test/t/module.rb b/test/t/module.rb
index ec36855e8..da0f78fad 100644
--- a/test/t/module.rb
+++ b/test/t/module.rb
@@ -25,6 +25,17 @@ assert('Module', '15.2.2') do
   assert_equal Class, Module.class
 end
 
+assert('Module#alias_method', '15.2.2.4.8') do
+  cls = Class.new do
+    def foo
+      "FOO"
+    end
+  end
+
+  assert_same(cls, cls.alias_method(:bar, :foo))
+  assert_equal("FOO", cls.new.bar)
+end
+
 # TODO not implemented ATM assert('Module.constants', '15.2.2.3.1') do
 
 assert('Module#ancestors', '15.2.2.4.9') do