1 files changed, 26 insertions, 0 deletions
diff --git a/spec/ruby/core/module/class_variables_spec.rb b/spec/ruby/core/module/class_variables_spec.rb
new file mode 100644
index 0000000000..066052cd01
--- /dev/null
+++ b/spec/ruby/core/module/class_variables_spec.rb
@@ -0,0 +1,26 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Module#class_variables" do
+  it "returns an Array with the names of class variables of self" do
+    ModuleSpecs::ClassVars::A.class_variables.should include(:@@a_cvar)
+    ModuleSpecs::ClassVars::M.class_variables.should include(:@@m_cvar)
+  end
+
+  it "returns an Array of Symbols of class variable names defined in a metaclass" do
+    obj = mock("metaclass class variable")
+    meta = obj.singleton_class
+    meta.send :class_variable_set, :@@var, :cvar_value
+    meta.class_variables.should == [:@@var]
+  end
+
+  it "returns an Array with names of class variables defined in metaclasses" do
+    ModuleSpecs::CVars.class_variables.should include(:@@cls, :@@meta)
+  end
+
+  it "does not return class variables defined in extended modules" do
+    c = Class.new
+    c.extend ModuleSpecs::MVars
+    c.class_variables.should_not include(:@@mvar)
+  end
+end