1 files changed, 20 insertions, 0 deletions
diff --git a/spec/ruby/core/module/attr_spec.rb b/spec/ruby/core/module/attr_spec.rb
index 8b91e77658..060d072f27 100644
--- a/spec/ruby/core/module/attr_spec.rb
+++ b/spec/ruby/core/module/attr_spec.rb
@@ -145,4 +145,24 @@ describe "Module#attr" do
   it "is a public method" do
     Module.should have_public_instance_method(:attr, false)
   end
+
+  ruby_version_is ""..."3.0" do
+    it "returns nil" do
+      Class.new do
+        (attr :foo, 'bar').should == nil
+        (attr :baz, false).should == nil
+        (attr :qux, true).should == nil
+      end
+    end
+  end
+
+  ruby_version_is "3.0" do
+    it "returns an array of defined methods names as symbols" do
+      Class.new do
+        (attr :foo, 'bar').should == [:foo, :bar]
+        (attr :baz, false).should == [:baz]
+        (attr :qux, true).should == [:qux, :qux=]
+      end
+    end
+  end
 end