1 files changed, 34 insertions, 0 deletions
diff --git a/spec/ruby/core/class/initialize_spec.rb b/spec/ruby/core/class/initialize_spec.rb
new file mode 100644
index 0000000000..d268596dfe
--- /dev/null
+++ b/spec/ruby/core/class/initialize_spec.rb
@@ -0,0 +1,34 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Class#initialize" do
+  it "is private" do
+    Class.should have_private_method(:initialize)
+  end
+
+  it "raises a TypeError when called on already initialized classes" do
+    lambda{
+      Fixnum.send :initialize
+    }.should raise_error(TypeError)
+
+    lambda{
+      Object.send :initialize
+    }.should raise_error(TypeError)
+  end
+
+  # See [redmine:2601]
+  it "raises a TypeError when called on BasicObject" do
+    lambda{
+      BasicObject.send :initialize
+    }.should raise_error(TypeError)
+  end
+
+  describe "when given the Class" do
+    before :each do
+      @uninitialized = Class.allocate
+    end
+
+    it "raises a TypeError" do
+      lambda{@uninitialized.send(:initialize, Class)}.should raise_error(TypeError)
+    end
+  end
+end