1 files changed, 12 insertions, 0 deletions
diff --git a/activesupport/test/core_ext/hash/transform_values_test.rb b/activesupport/test/core_ext/hash/transform_values_test.rb
index 4449c94701..45ed11fef7 100644
--- a/activesupport/test/core_ext/hash/transform_values_test.rb
+++ b/activesupport/test/core_ext/hash/transform_values_test.rb
@@ -46,4 +46,16 @@ class TransformValuesTest < ActiveSupport::TestCase
     assert_equal 'a!', mapped[:a]
     assert_nil mapped[:b]
   end
+
+  test "transform_values returns an Enumerator if no block is given" do
+    original = { a: 'a', b: 'b' }
+    enumerator = original.transform_values
+    assert_equal Enumerator, enumerator.class
+  end
+
+  test "transform_values is chainable with Enumerable methods" do
+    original = { a: 'a', b: 'b' }
+    mapped = original.transform_values.with_index { |v, i| [v, i].join }
+    assert_equal({ a: 'a0', b: 'b1' }, mapped)
+  end
 end