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-rw-r--r--activesupport/test/core_ext/hash_ext_test.rb7
1 files changed, 7 insertions, 0 deletions
diff --git a/activesupport/test/core_ext/hash_ext_test.rb b/activesupport/test/core_ext/hash_ext_test.rb
index 38cdda6c5c..4544edf0dd 100644
--- a/activesupport/test/core_ext/hash_ext_test.rb
+++ b/activesupport/test/core_ext/hash_ext_test.rb
@@ -486,6 +486,13 @@ class HashExtTest < ActiveSupport::TestCase
assert_equal 'bender', slice['login']
end
+ def test_extract
+ original = {:a => 1, :b => 2, :c => 3, :d => 4}
+ expected = {:a => 1, :b => 2}
+
+ assert_equal expected, original.extract!(:a, :b)
+ end
+
def test_except
original = { :a => 'x', :b => 'y', :c => 10 }
expected = { :a => 'x', :b => 'y' }