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Diffstat (limited to 'spec/ruby/core/class/subclasses_spec.rb')
-rw-r--r-- | spec/ruby/core/class/subclasses_spec.rb | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/spec/ruby/core/class/subclasses_spec.rb b/spec/ruby/core/class/subclasses_spec.rb new file mode 100644 index 0000000000..50eb5358d9 --- /dev/null +++ b/spec/ruby/core/class/subclasses_spec.rb @@ -0,0 +1,87 @@ +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 from the parent" do + parent = Class.new + child = Class.new(parent) + mod = Module.new + parent.include(mod) + + assert_subclasses(parent, [child]) + end + + it "does not return included modules from the child" do + parent = Class.new + child = Class.new(parent) + mod = Module.new + parent.include(mod) + + assert_subclasses(parent, [child]) + end + + it "does not return prepended modules from the parent" do + parent = Class.new + child = Class.new(parent) + mod = Module.new + parent.prepend(mod) + + assert_subclasses(parent, [child]) + end + + it "does not return prepended modules from the child" do + parent = Class.new + child = Class.new(parent) + mod = Module.new + child.prepend(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 + + it "works when creating subclasses concurrently" do + t = 16 + n = 1000 + go = false + superclass = Class.new + + threads = t.times.map do + Thread.new do + Thread.pass until go + n.times.map do + Class.new(superclass) + end + end + end + + go = true + classes = threads.map(&:value) + + superclass.subclasses.size.should == t * n + superclass.subclasses.each { |c| c.should be_kind_of(Class) } + end + + def assert_subclasses(mod,subclasses) + mod.subclasses.sort_by(&:inspect).should == subclasses.sort_by(&:inspect) + end + end +end |