1 files changed, 81 insertions, 0 deletions
diff --git a/spec/ruby/core/module/private_class_method_spec.rb b/spec/ruby/core/module/private_class_method_spec.rb
new file mode 100644
index 0000000000..ec10bcbf87
--- /dev/null
+++ b/spec/ruby/core/module/private_class_method_spec.rb
@@ -0,0 +1,81 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Module#private_class_method" do
+  before :each do
+    # This is not in classes.rb because after marking a class method private it
+    # will stay private.
+    class << ModuleSpecs::Parent
+      public
+      def private_method_1; end
+      def private_method_2; end
+    end
+  end
+
+  after :each do
+    class << ModuleSpecs::Parent
+      remove_method :private_method_1
+      remove_method :private_method_2
+    end
+  end
+
+  it "makes an existing class method private" do
+    ModuleSpecs::Parent.private_method_1.should == nil
+    ModuleSpecs::Parent.private_class_method :private_method_1
+    lambda { ModuleSpecs::Parent.private_method_1  }.should raise_error(NoMethodError)
+
+    # Technically above we're testing the Singleton classes, class method(right?).
+    # Try a "real" class method set private.
+    lambda { ModuleSpecs::Parent.private_method }.should raise_error(NoMethodError)
+  end
+
+  it "makes an existing class method private up the inheritance tree" do
+    ModuleSpecs::Child.public_class_method :private_method_1
+    ModuleSpecs::Child.private_method_1.should == nil
+    ModuleSpecs::Child.private_class_method :private_method_1
+
+    lambda { ModuleSpecs::Child.private_method_1 }.should raise_error(NoMethodError)
+    lambda { ModuleSpecs::Child.private_method   }.should raise_error(NoMethodError)
+  end
+
+  it "accepts more than one method at a time" do
+    ModuleSpecs::Parent.private_method_1.should == nil
+    ModuleSpecs::Parent.private_method_2.should == nil
+
+    ModuleSpecs::Child.private_class_method :private_method_1, :private_method_2
+
+    lambda { ModuleSpecs::Child.private_method_1 }.should raise_error(NoMethodError)
+    lambda { ModuleSpecs::Child.private_method_2 }.should raise_error(NoMethodError)
+  end
+
+  it "raises a NameError if class method doesn't exist" do
+    lambda do
+      ModuleSpecs.private_class_method :no_method_here
+    end.should raise_error(NameError)
+  end
+
+  it "makes a class method private" do
+    c = Class.new do
+      def self.foo() "foo" end
+      private_class_method :foo
+    end
+    lambda { c.foo }.should raise_error(NoMethodError)
+  end
+
+  it "raises a NameError when the given name is not a method" do
+    lambda do
+      Class.new do
+        private_class_method :foo
+      end
+    end.should raise_error(NameError)
+  end
+
+  it "raises a NameError when the given name is an instance method" do
+    lambda do
+      Class.new do
+        def foo() "foo" end
+        private_class_method :foo
+      end
+    end.should raise_error(NameError)
+  end
+end