Fixed ActiveSupport::OrderedHash #delete_if, #reject!, and #reject, which did...

Fixed ActiveSupport::OrderedHash #delete_if, #reject!, and #reject, which did not sync the @keys after the operation.

This probably holds true for other mutating methods as well.
Signed-off-by: NMichael Koziarski <michael@koziarski.com>

activesupport/lib/active_support/ordered_hash.rb

@@ -25,6 +25,25 @@ def delete(key)
         super
       end
 
+      def delete_if
+        super
+        sync_keys!
+        self
+      end
+
+      def reject!
+        super
+        sync_keys!
+        self
+      end
+
+      def reject(&block)
+        dup.reject!(&block)
+      end
+
+      alias_method :super_keys, :keys
+      private :super_keys
+
       def keys
         @keys
       end
@@ -48,6 +67,12 @@ def each_value
       def each
         keys.each {|key| yield [key, self[key]]}
       end
+
+      private
+
+      def sync_keys!
+        (@keys - super_keys).each { |k| @keys.delete(k) }
+      end
     end
   end
 end

activesupport/test/ordered_hash_test.rb

@@ -83,4 +83,24 @@ def test_each
   def test_each_with_index
     @ordered_hash.each_with_index { |pair, index| assert_equal [@keys[index], @values[index]], pair}
   end
-end
+
+  def test_delete_if
+    (copy = @ordered_hash.dup).delete('pink')
+    assert_equal copy, @ordered_hash.delete_if { |k, _| k == 'pink' }
+    assert !@ordered_hash.keys.include?('pink')
+  end
+
+  def test_reject!
+    (copy = @ordered_hash.dup).delete('pink')
+    @ordered_hash.reject! { |k, _| k == 'pink' }
+    assert_equal copy, @ordered_hash
+    assert !@ordered_hash.keys.include?('pink')
+  end
+
+  def test_reject
+    copy = @ordered_hash.dup
+    new_ordered_hash = @ordered_hash.reject { |k, _| k == 'pink' }
+    assert_equal copy, @ordered_hash
+    assert !new_ordered_hash.keys.include?('pink')
+  end
+end
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