1 files changed, 29 insertions, 0 deletions
diff --git a/test/test_forwardable.rb b/test/test_forwardable.rb
index f678ca4fc7..b948fddac0 100644
--- a/test/test_forwardable.rb
+++ b/test/test_forwardable.rb
@@ -253,6 +253,35 @@ class TestForwardable < Test::Unit::TestCase
     }
   end
 
+  def test_aref
+    obj = Object.new.extend SingleForwardable
+    obj.instance_variable_set("@h", {foo: 42})
+    obj.def_delegator("@h", :[])
+    assert_equal(42, obj[:foo])
+  end
+
+  def test_aset
+    obj = Object.new.extend SingleForwardable
+    obj.instance_variable_set("@h", h = {foo: 0})
+    obj.def_delegator("@h", :[]=)
+    obj[:foo] = 42
+    assert_equal(42, h[:foo])
+  end
+
+  def test_binop
+    obj = Object.new.extend SingleForwardable
+    obj.instance_variable_set("@h", 40)
+    obj.def_delegator("@h", :+)
+    assert_equal(42, obj+2)
+  end
+
+  def test_uniop
+    obj = Object.new.extend SingleForwardable
+    obj.instance_variable_set("@h", -42)
+    obj.def_delegator("@h", :-@)
+    assert_equal(42, -obj)
+  end
+
   private
 
   def forwardable_class(