1 files changed, 72 insertions, 0 deletions
diff --git a/spec/ruby/core/module/public_method_defined_spec.rb b/spec/ruby/core/module/public_method_defined_spec.rb
new file mode 100644
index 0000000000..329778ac15
--- /dev/null
+++ b/spec/ruby/core/module/public_method_defined_spec.rb
@@ -0,0 +1,72 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Module#public_method_defined?" do
+  it "returns true if the named public method is defined by module or its ancestors" do
+    ModuleSpecs::CountsMixin.public_method_defined?("public_3").should == true
+
+    ModuleSpecs::CountsParent.public_method_defined?("public_3").should == true
+    ModuleSpecs::CountsParent.public_method_defined?("public_2").should == true
+
+    ModuleSpecs::CountsChild.public_method_defined?("public_3").should == true
+    ModuleSpecs::CountsChild.public_method_defined?("public_2").should == true
+    ModuleSpecs::CountsChild.public_method_defined?("public_1").should == true
+  end
+
+  it "returns false if method is not a public method" do
+    ModuleSpecs::CountsChild.public_method_defined?("private_3").should == false
+    ModuleSpecs::CountsChild.public_method_defined?("private_2").should == false
+    ModuleSpecs::CountsChild.public_method_defined?("private_1").should == false
+
+    ModuleSpecs::CountsChild.public_method_defined?("protected_3").should == false
+    ModuleSpecs::CountsChild.public_method_defined?("protected_2").should == false
+    ModuleSpecs::CountsChild.public_method_defined?("protected_1").should == false
+  end
+
+  it "returns false if the named method is not defined by the module or its ancestors" do
+    ModuleSpecs::CountsMixin.public_method_defined?(:public_10).should == false
+  end
+
+  it "accepts symbols for the method name" do
+    ModuleSpecs::CountsMixin.public_method_defined?(:public_3).should == true
+  end
+
+  it "raises a TypeError if passed a Fixnum" do
+    lambda do
+      ModuleSpecs::CountsMixin.public_method_defined?(1)
+    end.should raise_error(TypeError)
+  end
+
+  it "raises a TypeError if passed nil" do
+    lambda do
+      ModuleSpecs::CountsMixin.public_method_defined?(nil)
+    end.should raise_error(TypeError)
+  end
+
+  it "raises a TypeError if passed false" do
+    lambda do
+      ModuleSpecs::CountsMixin.public_method_defined?(false)
+    end.should raise_error(TypeError)
+  end
+
+  it "raises a TypeError if passed an object that does not defined #to_str" do
+    lambda do
+      ModuleSpecs::CountsMixin.public_method_defined?(mock('x'))
+    end.should raise_error(TypeError)
+  end
+
+  it "raises a TypeError if passed an object that defines #to_sym" do
+    sym = mock('symbol')
+    def sym.to_sym() :public_3 end
+
+    lambda do
+      ModuleSpecs::CountsMixin.public_method_defined?(sym)
+    end.should raise_error(TypeError)
+  end
+
+  it "calls #to_str to convert an Object" do
+    str = mock('public_3')
+    def str.to_str() 'public_3' end
+    ModuleSpecs::CountsMixin.public_method_defined?(str).should == true
+  end
+end