1 files changed, 42 insertions, 0 deletions
diff --git a/test/ruby/test_alias.rb b/test/ruby/test_alias.rb
new file mode 100644
index 000000000..0e94e1460
--- /dev/null
+++ b/test/ruby/test_alias.rb
@@ -0,0 +1,42 @@
+require 'test/unit'
+
+$KCODE = 'none'
+
+class TestAlias < Test::Unit::TestCase
+  class Alias0
+    def foo; "foo" end
+  end
+  class Alias1<Alias0
+    alias bar foo
+    def foo; "foo+" + super end
+  end
+  class Alias2<Alias1
+    alias baz foo
+    undef foo
+  end
+  class Alias3<Alias2
+    def foo
+      defined? super
+    end
+    def bar
+      defined? super
+    end
+    def quux
+      defined? super
+    end
+  end
+
+  def test_alias
+    x = Alias2.new
+    assert(x.bar == "foo")
+    assert(x.baz == "foo+foo")
+    
+    # test_check for cache
+    assert(x.baz == "foo+foo")
+    
+    x = Alias3.new
+    assert(!x.foo)
+    assert(x.bar)
+    assert(!x.quux)
+  end
+end