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-rw-r--r--activemodel/test/cases/errors_test.rb8
1 files changed, 8 insertions, 0 deletions
diff --git a/activemodel/test/cases/errors_test.rb b/activemodel/test/cases/errors_test.rb
index 4edeece3e8..ab80f193b6 100644
--- a/activemodel/test/cases/errors_test.rb
+++ b/activemodel/test/cases/errors_test.rb
@@ -40,6 +40,14 @@ class ErrorsTest < ActiveModel::TestCase
assert errors.include?(:foo), 'errors should include :foo'
end
+ def test_dup
+ errors = ActiveModel::Errors.new(self)
+ errors[:foo] = 'bar'
+ errors_dup = errors.dup
+ errors_dup[:bar] = 'omg'
+ assert_not_same errors_dup.messages, errors.messages
+ end
+
def test_has_key?
errors = ActiveModel::Errors.new(self)
errors[:foo] = 'omg'