Add uniq_by and uniq_by! to Array.

1 files changed, 23 insertions, 3 deletions

diff --git a/activesupport/test/core_ext/array_ext_test.rb b/activesupport/test/core_ext/array_ext_test.rb
index f5f91ddd80..6f3b28682a 100644
--- a/activesupport/test/core_ext/array_ext_test.rb
+++ b/activesupport/test/core_ext/array_ext_test.rb
@@ -51,9 +51,7 @@ class ArrayExtToParamTests < Test::Unit::TestCase
   end
 end
 
-class ArrayExtToSentenceTests < Test::Unit::TestCase
-  include ActiveSupport::Testing::Deprecation
-  
+class ArrayExtToSentenceTests < ActiveSupport::TestCase  
   def test_plain_array_to_sentence
     assert_equal "", [].to_sentence
     assert_equal "one", ['one'].to_sentence
@@ -320,6 +318,28 @@ class ArrayExtractOptionsTests < Test::Unit::TestCase
   end
 end
 
+class ArrayUniqByTests < Test::Unit::TestCase
+  def test_uniq_by
+    assert_equal [1,2], [1,2,3,4].uniq_by { |i| i.odd? }
+    assert_equal [1,2], [1,2,3,4].uniq_by(&:even?)
+    assert_equal (-5..0).to_a, (-5..5).to_a.uniq_by{ |i| i**2 }
+  end
+
+  def test_uniq_by!
+    a = [1,2,3,4]
+    a.uniq_by! { |i| i.odd? }
+    assert_equal [1,2], a
+
+    a = [1,2,3,4]
+    a.uniq_by! { |i| i.even? }
+    assert_equal [1,2], a
+
+    a = (-5..5).to_a
+    a.uniq_by! { |i| i**2 }
+    assert_equal (-5..0).to_a, a
+  end
+end
+
 class ArrayExtRandomTests < Test::Unit::TestCase
   def test_random_element_from_array
     assert_nil [].rand