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-rw-r--r--activesupport/test/test_case_test.rb16
1 files changed, 16 insertions, 0 deletions
diff --git a/activesupport/test/test_case_test.rb b/activesupport/test/test_case_test.rb
index 19901fad99..8698c66e6d 100644
--- a/activesupport/test/test_case_test.rb
+++ b/activesupport/test/test_case_test.rb
@@ -52,6 +52,22 @@ class AssertionsTest < ActiveSupport::TestCase
assert_equal "Object Changed.\n\"@object.num\" didn't change by 0.\nExpected: 0\n Actual: 1", error.message
end
+ def test_assert_no_difference_with_multiple_expressions_pass
+ another_object = @object.dup
+ assert_no_difference ["@object.num", -> { another_object.num }] do
+ # ...
+ end
+ end
+
+ def test_assert_no_difference_with_multiple_expressions_fail
+ another_object = @object.dup
+ assert_raises(Minitest::Assertion) do
+ assert_no_difference ["@object.num", -> { another_object.num }], "Another Object Changed" do
+ another_object.increment
+ end
+ end
+ end
+
def test_assert_difference
assert_difference "@object.num", +1 do
@object.increment