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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "Module#ancestors" do
it "returns a list of modules included in self (including self)" do
BasicObject.ancestors.should == [BasicObject]
ModuleSpecs.ancestors.should == [ModuleSpecs]
ModuleSpecs::Basic.ancestors.should == [ModuleSpecs::Basic]
ModuleSpecs::Super.ancestors.should == [ModuleSpecs::Super, ModuleSpecs::Basic]
ModuleSpecs.without_test_modules(ModuleSpecs::Parent.ancestors).should ==
[ModuleSpecs::Parent, Object, Kernel, BasicObject]
ModuleSpecs.without_test_modules(ModuleSpecs::Child.ancestors).should ==
[ModuleSpecs::Child, ModuleSpecs::Super, ModuleSpecs::Basic, ModuleSpecs::Parent, Object, Kernel, BasicObject]
end
it "returns only modules and classes" do
class << ModuleSpecs::Child; self; end.ancestors.should include(ModuleSpecs::Internal, Class, Module, Object, Kernel)
end
it "has 1 entry per module or class" do
ModuleSpecs::Parent.ancestors.should == ModuleSpecs::Parent.ancestors.uniq
end
describe "when called on a singleton class" do
it "includes the singleton classes of ancestors" do
parent = Class.new
child = Class.new(parent)
schild = child.singleton_class
schild.ancestors.should include(schild,
parent.singleton_class,
Object.singleton_class,
BasicObject.singleton_class,
Class,
Module,
Object,
Kernel,
BasicObject)
end
describe 'for a standalone module' do
it 'does not include Class' do
s_mod = ModuleSpecs.singleton_class
s_mod.ancestors.should_not include(Class)
end
it 'does not include other singleton classes' do
s_standalone_mod = ModuleSpecs.singleton_class
s_module = Module.singleton_class
s_object = Object.singleton_class
s_basic_object = BasicObject.singleton_class
s_standalone_mod.ancestors.should_not include(s_module, s_object, s_basic_object)
end
it 'includes its own singleton class' do
s_mod = ModuleSpecs.singleton_class
s_mod.ancestors.should include(s_mod)
end
it 'includes standard chain' do
s_mod = ModuleSpecs.singleton_class
s_mod.ancestors.should include(Module, Object, Kernel, BasicObject)
end
end
end
end
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