removes unused Object#subclasses_of

activesupport/lib/active_support/core_ext/object/extending.rb

@@ -36,18 +36,6 @@ class Class
 end
 
 class Object
-  # Exclude this class unless it's a subclass of our supers and is defined.
-  # We check defined? in case we find a removed class that has yet to be
-  # garbage collected. This also fails for anonymous classes -- please
-  # submit a patch if you have a workaround.
-  def subclasses_of(*superclasses) #:nodoc:
-    subclasses = []
-    superclasses.each do |klass|
-      subclasses.concat klass.descendents.select {|k| k.name.blank? || k.reachable?}
-    end
-    subclasses
-  end
-
   def extended_by #:nodoc:
     ancestors = class << self; ancestors end
     ancestors.select { |mod| mod.class == Module } - [ Object, Kernel ]

activesupport/test/core_ext/object_and_class_ext_test.rb

@@ -40,55 +40,6 @@ class Foo
   include Bar
 end
 
-class ClassExtTest < Test::Unit::TestCase
-  def test_subclasses_of_should_find_nested_classes
-    assert Object.subclasses_of(ClassK).include?(Nested::ClassL)
-  end
-
-  def test_subclasses_of_should_not_return_removed_classes
-    # First create the removed class
-    old_class = Nested.class_eval { remove_const :ClassL }
-    new_class = Class.new(ClassK)
-    Nested.const_set :ClassL, new_class
-    assert_equal "Nested::ClassL", new_class.name # Sanity check
-
-    subclasses = Object.subclasses_of(ClassK)
-    assert subclasses.include?(new_class)
-    assert ! subclasses.include?(old_class)
-  ensure
-    Nested.const_set :ClassL, old_class unless defined?(Nested::ClassL)
-  end
-  
-  def test_subclasses_of_should_not_trigger_const_missing
-    const_missing = false
-    Nested.on_const_missing { const_missing = true }
-    
-    subclasses = Object.subclasses_of ClassK
-    assert !const_missing
-    assert_equal [ Nested::ClassL ], subclasses
-    
-    removed = Nested.class_eval { remove_const :ClassL }  # keep it in memory
-    subclasses = Object.subclasses_of ClassK
-    assert !const_missing
-    assert subclasses.empty?
-  ensure
-    Nested.const_set :ClassL, removed unless defined?(Nested::ClassL)
-  end
-  
-  def test_subclasses_of_with_multiple_roots
-    classes = Object.subclasses_of(ClassI, ClassK)
-    assert_equal %w(ClassJ Nested::ClassL), classes.collect(&:to_s).sort
-  end
-
-  def test_subclasses_of_doesnt_find_anonymous_classes
-    assert_equal [], Object.subclasses_of(Foo)
-    bar = Class.new(Foo)
-    assert_nothing_raised do
-      assert_equal [bar], Object.subclasses_of(Foo)
-    end
-  end
-end
-
 class ObjectTests < Test::Unit::TestCase
   def test_extended_by
     foo = Foo.new