diff options
author | José Valim <jose.valim@gmail.com> | 2010-07-05 12:50:08 +0200 |
---|---|---|
committer | José Valim <jose.valim@gmail.com> | 2010-07-05 13:01:27 +0200 |
commit | a5dda97602f2188a13cbcab5c7e9a5ba84ba876b (patch) | |
tree | be84ca4360059f6eb3f696b46e1bdad3d57b1ce2 /activesupport/test/core_ext/class_test.rb | |
parent | 5bf3294c8b3aeb3afd426e8c182456c675829c1e (diff) | |
download | rails-a5dda97602f2188a13cbcab5c7e9a5ba84ba876b.tar.gz rails-a5dda97602f2188a13cbcab5c7e9a5ba84ba876b.tar.bz2 rails-a5dda97602f2188a13cbcab5c7e9a5ba84ba876b.zip |
Define a convention for descendants and subclasses.
The former should be symmetric with ancestors and include all children. However, it should not include self since ancestors + descendants should not have duplicated. The latter is symmetric to superclass in the sense it only includes direct children.
By adopting a convention, we expect to have less conflict with other frameworks, as Datamapper. For this moment, to ensure ActiveModel::Validations can be used with Datamapper, we should always call ActiveSupport::DescendantsTracker.descendants(self) internally instead of self.descendants avoiding conflicts.
Diffstat (limited to 'activesupport/test/core_ext/class_test.rb')
-rw-r--r-- | activesupport/test/core_ext/class_test.rb | 40 |
1 files changed, 19 insertions, 21 deletions
diff --git a/activesupport/test/core_ext/class_test.rb b/activesupport/test/core_ext/class_test.rb index b7f3dd9930..08bb13dd35 100644 --- a/activesupport/test/core_ext/class_test.rb +++ b/activesupport/test/core_ext/class_test.rb @@ -1,29 +1,27 @@ require 'abstract_unit' require 'active_support/core_ext/class' -class A -end +class ClassTest < Test::Unit::TestCase + class Parent; end + class Foo < Parent; end + class Bar < Foo; end + class Baz < Bar; end -module X - class B - end -end + class A < Parent; end + class B < A; end + class C < B; end -module Y - module Z - class C - end + def test_descendants + assert_equal [Foo, Bar, Baz, A, B, C], Parent.descendants + assert_equal [Bar, Baz], Foo.descendants + assert_equal [Baz], Bar.descendants + assert_equal [], Baz.descendants end -end -class ClassTest < Test::Unit::TestCase - def test_retrieving_subclasses - @parent = eval("class D; end; D") - @sub = eval("class E < D; end; E") - @subofsub = eval("class F < E; end; F") - assert_equal 2, @parent.subclasses.size - assert_equal [@subofsub.to_s], @sub.subclasses - assert_equal [], @subofsub.subclasses - assert_equal [@sub.to_s, @subofsub.to_s].sort, @parent.subclasses.sort + def test_subclasses + assert_equal [Foo, A], Parent.subclasses + assert_equal [Bar], Foo.subclasses + assert_equal [Baz], Bar.subclasses + assert_equal [], Baz.subclasses end -end +end
\ No newline at end of file |