1 files changed, 27 insertions, 0 deletions
diff --git a/spec/ruby/core/class/superclass_spec.rb b/spec/ruby/core/class/superclass_spec.rb
new file mode 100644
index 0000000000..18b7ce5bde
--- /dev/null
+++ b/spec/ruby/core/class/superclass_spec.rb
@@ -0,0 +1,27 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Class#superclass" do
+  it "returns the superclass of self" do
+    BasicObject.superclass.should be_nil
+    Object.superclass.should == BasicObject
+    Class.superclass.should == Module
+    Class.new.superclass.should == Object
+    Class.new(String).superclass.should == String
+    Class.new(Fixnum).superclass.should == Fixnum
+  end
+
+  # redmine:567
+  describe "for a singleton class" do
+    it "of an object returns the class of the object" do
+      a = CoreClassSpecs::A.new
+      sc = class << a; self; end
+      sc.superclass.should == CoreClassSpecs::A
+    end
+
+    it "of a class returns the singleton class of its superclass" do # sorry, can't find a simpler way to express this...
+      sc = class << CoreClassSpecs::H; self; end
+      sc.superclass.should == class << CoreClassSpecs::A; self; end
+    end
+  end
+end