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author | Jeremy Evans <code@jeremyevans.net> | 2021-10-26 10:35:21 -0900 |
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committer | GitHub <noreply@github.com> | 2021-10-26 12:35:21 -0700 |
commit | 717ab0bb2ee63dfe76076e0c9f91fbac3a0de4fd (patch) | |
tree | d2b531647657dd58e6ce6e64e3f6fa0adaa75f40 /spec/ruby/core | |
parent | a4d5ee4f31bf3ff36c1a8c8fe3cda16aa1016b12 (diff) | |
download | ruby-717ab0bb2ee63dfe76076e0c9f91fbac3a0de4fd.tar.gz |
Add Class#descendants
Doesn't include receiver or singleton classes.
Implements [Feature #14394]
Co-authored-by: fatkodima <fatkodima123@gmail.com>
Co-authored-by: Benoit Daloze <eregontp@gmail.com>
Diffstat (limited to 'spec/ruby/core')
-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 |