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-rw-r--r--activerecord/test/cases/persistence_test.rb5
1 files changed, 5 insertions, 0 deletions
diff --git a/activerecord/test/cases/persistence_test.rb b/activerecord/test/cases/persistence_test.rb
index 576fd21642..8073cabae6 100644
--- a/activerecord/test/cases/persistence_test.rb
+++ b/activerecord/test/cases/persistence_test.rb
@@ -127,6 +127,11 @@ class PersistenceTest < ActiveRecord::TestCase
assert_operator previously_written_on, :<, topic.written_on
end
+ def test_increment_with_no_arg
+ topic = topics(:first)
+ assert_raises(ArgumentError) { topic.increment! }
+ end
+
def test_destroy_many
clients = Client.find([2, 3])