assert_equal (expected, actual, message = nil) assert_difference (expression, difference = 1, message = nil, &block) assert_nil (object, message = nil) assert_raise (*args, &block) assert_not_equal (expected, actual, message = nil) Assertions refute (test, message = nil) refute_equal (expected, actual, message = nil) refute_match (pattern, string, message = nil) refute_nil (object, message = nil) refute_empty(object, message = nil) refute_includes(collection, object, message = nil) Refutations www.ict4g.org