/**
     * tests failure messages for assertions
     *
     * @param string $assertion Assertion method
     * @param string $message Expected failure message
     * @param string $url URL to test
     * @param mixed ...$rest
     */
    #[DataProvider('assertionFailureMessagesProvider')]
    public function testAssertionFailureMessages($assertion, $message, $url, ...$rest): void
    {
        $this->expectException(AssertionFailedError::class);
        $this->expectExceptionMessage($message);

        Security::setSalt($this->key);

        $this->get($url);

        call_user_func_array($this->$assertion(...), $rest);
    }