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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
ruby_version_is ""..."1.9" do
not_compliant_on :rubinius do
it "accepts Fixnums for class variables" do
c = Class.new { class_variable_set :@@class_var, "test" }
c.class_variable_defined?(:@@class_var.to_i).should == true
c.class_variable_defined?(:@@no_class_var.to_i).should == false
end
end
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
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