In module Test§
See primary documentation in context for sub unlike.
multi unlike(Str() $got, Regex:D $expected, $desc = "text does not match $expected.raku()")
Used this way:
unlike 'foo', /bar/, 'foo does not look like bar';
Marks a test as passed if the first parameter, when coerced to a string, does not match the regular expression specified as the second parameter. The function accepts an optional description of the test, which defaults to printing the text that did not match.