1 files changed, 16 insertions, 0 deletions
diff --git a/spec/ruby/core/struct/instance_variables_spec.rb b/spec/ruby/core/struct/instance_variables_spec.rb
new file mode 100644
index 0000000000..f6d30ea97e
--- /dev/null
+++ b/spec/ruby/core/struct/instance_variables_spec.rb
@@ -0,0 +1,16 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "Struct#instance_variables" do
+  it "returns an empty array if only attributes are defined" do
+    car = StructClasses::Car.new("Hugo", "Foo", "1972")
+    car.instance_variables.should == []
+  end
+
+  it "returns an array with one name if an instance variable is added" do
+    car = StructClasses::Car.new("Hugo", "Foo", "1972")
+    car.instance_variables.should == []
+    car.instance_variable_set("@test", 1)
+    car.instance_variables.should == [:@test]
+  end
+end