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-rw-r--r--activesupport/test/test_test.rb20
1 files changed, 19 insertions, 1 deletions
diff --git a/activesupport/test/test_test.rb b/activesupport/test/test_test.rb
index 0fa08c0e3a..6f63a8a725 100644
--- a/activesupport/test/test_test.rb
+++ b/activesupport/test/test_test.rb
@@ -28,12 +28,30 @@ class AssertDifferenceTest < ActiveSupport::TestCase
assert_equal 'custom', e.message
end
- def test_assert_no_difference
+ def test_assert_no_difference_pass
assert_no_difference '@object.num' do
# ...
end
end
+ def test_assert_no_difference_fail
+ error = assert_raises(Minitest::Assertion) do
+ assert_no_difference '@object.num' do
+ @object.increment
+ end
+ end
+ assert_equal "\"@object.num\" didn't change by 0.\nExpected: 0\n Actual: 1", error.message
+ end
+
+ def test_assert_no_difference_with_message_fail
+ error = assert_raises(Minitest::Assertion) do
+ assert_no_difference '@object.num', 'Object Changed' do
+ @object.increment
+ end
+ end
+ assert_equal "Object Changed.\n\"@object.num\" didn't change by 0.\nExpected: 0\n Actual: 1", error.message
+ end
+
def test_assert_difference
assert_difference '@object.num', +1 do
@object.increment