From c0c2b31a35e19a47b499b57807bc0a0f9325f6d3 Mon Sep 17 00:00:00 2001 From: Jean Boussier Date: Thu, 28 Oct 2021 14:07:11 +0200 Subject: Add Class#subclasses Implements [Feature #18273] Returns an array containing the receiver's direct subclasses without singleton classes. --- spec/ruby/core/class/subclasses_spec.rb | 38 +++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 spec/ruby/core/class/subclasses_spec.rb (limited to 'spec/ruby') diff --git a/spec/ruby/core/class/subclasses_spec.rb b/spec/ruby/core/class/subclasses_spec.rb new file mode 100644 index 0000000000..ddbcfb02c0 --- /dev/null +++ b/spec/ruby/core/class/subclasses_spec.rb @@ -0,0 +1,38 @@ +require_relative '../../spec_helper' +require_relative '../module/fixtures/classes' + +ruby_version_is '3.1' do + describe "Class#subclasses" do + it "returns a list of classes directly inheriting from self" do + assert_subclasses(ModuleSpecs::Parent, [ModuleSpecs::Child, ModuleSpecs::Child2]) + end + + it "does not return included modules" do + parent = Class.new + child = Class.new(parent) + mod = Module.new + parent.include(mod) + + assert_subclasses(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.subclasses.should_not include(a_obj.singleton_class) + end + + it "has 1 entry per module or class" do + ModuleSpecs::Parent.subclasses.should == ModuleSpecs::Parent.subclasses.uniq + end + + def assert_subclasses(mod,subclasses) + mod.subclasses.sort_by(&:inspect).should == subclasses.sort_by(&:inspect) + end + end +end -- cgit v1.2.3