1 files changed, 14 insertions, 0 deletions
diff --git a/activemodel/test/cases/attributes_test.rb b/activemodel/test/cases/attributes_test.rb
index 5483fb101d..af0ddcb92f 100644
--- a/activemodel/test/cases/attributes_test.rb
+++ b/activemodel/test/cases/attributes_test.rb
@@ -67,6 +67,20 @@ module ActiveModel
       assert_equal expected_attributes, data.attributes
     end
 
+    test "reading attribute names" do
+      names = [
+        "integer_field",
+        "string_field",
+        "decimal_field",
+        "string_with_default",
+        "date_field",
+        "boolean_field"
+      ]
+
+      assert_equal names, ModelForAttributesTest.attribute_names
+      assert_equal names, ModelForAttributesTest.new.attribute_names
+    end
+
     test "nonexistent attribute" do
       assert_raise ActiveModel::UnknownAttributeError do
         ModelForAttributesTest.new(nonexistent: "nonexistent")