diff options
Diffstat (limited to 'spec/ruby/core/module/class_variable_defined_spec.rb')
-rw-r--r-- | spec/ruby/core/module/class_variable_defined_spec.rb | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/spec/ruby/core/module/class_variable_defined_spec.rb b/spec/ruby/core/module/class_variable_defined_spec.rb new file mode 100644 index 0000000000..d47329455f --- /dev/null +++ b/spec/ruby/core/module/class_variable_defined_spec.rb @@ -0,0 +1,72 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) + +describe "Module#class_variable_defined?" do + it "returns true if a class variable with the given name is defined in self" do + c = Class.new { class_variable_set :@@class_var, "test" } + c.class_variable_defined?(:@@class_var).should == true + c.class_variable_defined?("@@class_var").should == true + c.class_variable_defined?(:@@no_class_var).should == false + c.class_variable_defined?("@@no_class_var").should == false + ModuleSpecs::CVars.class_variable_defined?("@@cls").should == true + end + + it "returns true if a class variable with the given name is defined in the metaclass" do + ModuleSpecs::CVars.class_variable_defined?("@@meta").should == true + end + + it "returns true if the class variable is defined in a metaclass" do + obj = mock("metaclass class variable") + meta = obj.singleton_class + meta.send :class_variable_set, :@@var, 1 + meta.send(:class_variable_defined?, :@@var).should be_true + end + + it "returns false if the class variable is not defined in a metaclass" do + obj = mock("metaclass class variable") + meta = obj.singleton_class + meta.class_variable_defined?(:@@var).should be_false + end + + it "returns true if a class variables with the given name is defined in an included module" do + c = Class.new { include ModuleSpecs::MVars } + c.class_variable_defined?("@@mvar").should == true + end + + it "returns false if a class variables with the given name is defined in an extended module" do + c = Class.new + c.extend ModuleSpecs::MVars + c.class_variable_defined?("@@mvar").should == false + end + + it "raises a NameError when the given name is not allowed" do + c = Class.new + + lambda { + c.class_variable_defined?(:invalid_name) + }.should raise_error(NameError) + + lambda { + c.class_variable_defined?("@invalid_name") + }.should raise_error(NameError) + end + + it "converts a non string/symbol/fixnum name to string using to_str" do + c = Class.new { class_variable_set :@@class_var, "test" } + (o = mock('@@class_var')).should_receive(:to_str).and_return("@@class_var") + c.class_variable_defined?(o).should == true + end + + it "raises a TypeError when the given names can't be converted to strings using to_str" do + c = Class.new { class_variable_set :@@class_var, "test" } + o = mock('123') + lambda { + c.class_variable_defined?(o) + }.should raise_error(TypeError) + + o.should_receive(:to_str).and_return(123) + lambda { + c.class_variable_defined?(o) + }.should raise_error(TypeError) + end +end |