diff options
Diffstat (limited to 'spec')
-rw-r--r-- | spec/ruby/core/class/descendants_spec.rb | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/spec/ruby/core/class/descendants_spec.rb b/spec/ruby/core/class/descendants_spec.rb new file mode 100644 index 0000000000..f87cd68be8 --- /dev/null +++ b/spec/ruby/core/class/descendants_spec.rb @@ -0,0 +1,38 @@ +require_relative '../../spec_helper' +require_relative '../module/fixtures/classes' + +ruby_version_is '3.1' do + describe "Class#descendants" do + it "returns a list of classes descended from self (excluding self)" do + assert_descendants(ModuleSpecs::Parent, [ModuleSpecs::Child, ModuleSpecs::Child2, ModuleSpecs::Grandchild]) + end + + it "does not return included modules" do + parent = Class.new + child = Class.new(parent) + mod = Module.new + parent.include(mod) + + assert_descendants(parent, [child]) + end + + it "does not return singleton classes" do + a = Class.new + + a_obj = a.new + def a_obj.force_singleton_class + 42 + end + + a.descendants.should_not include(a_obj.singleton_class) + end + + it "has 1 entry per module or class" do + ModuleSpecs::Parent.descendants.should == ModuleSpecs::Parent.descendants.uniq + end + + def assert_descendants(mod, descendants) + mod.descendants.sort_by(&:inspect).should == descendants.sort_by(&:inspect) + end + end +end |