diff options
Diffstat (limited to 'spec/ruby/core/module/class_variable_get_spec.rb')
-rw-r--r-- | spec/ruby/core/module/class_variable_get_spec.rb | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/spec/ruby/core/module/class_variable_get_spec.rb b/spec/ruby/core/module/class_variable_get_spec.rb new file mode 100644 index 0000000000..7068801cc0 --- /dev/null +++ b/spec/ruby/core/module/class_variable_get_spec.rb @@ -0,0 +1,76 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) + +describe "Module#class_variable_get" do + it "returns the value of the class variable with the given name" do + c = Class.new { class_variable_set :@@class_var, "test" } + c.send(:class_variable_get, :@@class_var).should == "test" + c.send(:class_variable_get, "@@class_var").should == "test" + end + + it "returns the value of a class variable with the given name defined in an included module" do + c = Class.new { include ModuleSpecs::MVars } + c.send(:class_variable_get, "@@mvar").should == :mvar + end + + it "raises a NameError for a class variable named '@@'" do + c = Class.new + lambda { c.send(:class_variable_get, "@@") }.should raise_error(NameError) + lambda { c.send(:class_variable_get, :"@@") }.should raise_error(NameError) + end + + it "raises a NameError for a class variables with the given name defined in an extended module" do + c = Class.new + c.extend ModuleSpecs::MVars + lambda { + c.send(:class_variable_get, "@@mvar") + }.should raise_error(NameError) + end + + it "returns class variables defined in the class body and accessed in the metaclass" do + ModuleSpecs::CVars.cls.should == :class + end + + it "returns class variables defined in the metaclass and accessed by class methods" do + ModuleSpecs::CVars.meta.should == :metainfo + end + + it "returns class variables defined in the metaclass and accessed by instance methods" do + ModuleSpecs::CVars.new.meta.should == :metainfo + end + + it "returns a class variable defined in a metaclass" do + obj = mock("metaclass class variable") + meta = obj.singleton_class + meta.send :class_variable_set, :@@var, :cvar_value + meta.send(:class_variable_get, :@@var).should == :cvar_value + end + + it "raises a NameError when an uninitialized class variable is accessed" do + c = Class.new + [:@@no_class_var, "@@no_class_var"].each do |cvar| + lambda { c.send(:class_variable_get, cvar) }.should raise_error(NameError) + end + end + + it "raises a NameError when the given name is not allowed" do + c = Class.new + + lambda { c.send(:class_variable_get, :invalid_name) }.should raise_error(NameError) + lambda { c.send(:class_variable_get, "@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.send(:class_variable_get, o).should == "test" + 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.send(:class_variable_get, o) }.should raise_error(TypeError) + o.should_receive(:to_str).and_return(123) + lambda { c.send(:class_variable_get, o) }.should raise_error(TypeError) + end +end |