AssertionFailedError example

<?php
throw new \PHPUnit\Framework\AssertionFailedError('Response body should not be evaluated.');

  protected function componentEndTest($test, $time) {
    /** @var \PHPUnit\Framework\Test $test */
    if (substr($test->toString(), 0, 22) == 'Drupal\Tests\Component') {
      if ($test instanceof BrowserTestBase || $test instanceof KernelTestBase || $test instanceof UnitTestCase) {
        $error = new AssertionFailedError('Component tests should not extend a core test base class.');
        $test->getTestResultObject()->addFailure($test, $error, $time);
      }
    }
  }

}

DnsMock::register(\get_class($test));
                }
            }

            if (!$test->getTestResultObject()) {
                return;
            }

            $annotations = Test::parseTestMethodAnnotations(\get_class($test), $test->getName(false));

            if (isset($annotations['class']['expectedDeprecation'])) {
                $test->getTestResultObject()->addError($test, new AssertionFailedError('"@expectedDeprecation" annotations are not allowed at the class level.'), 0);
            }
            if (isset($annotations['method']['expectedDeprecation']) || $this->checkNumAssertions = method_exists($test, 'expectDeprecation') && (new \ReflectionMethod($test, 'expectDeprecation'))->getFileName() === (new \ReflectionMethod(ExpectDeprecationTrait::class, 'expectDeprecation'))->getFileName()) {
                if (isset($annotations['method']['expectedDeprecation'])) {
                    self::$expectedDeprecations = $annotations['method']['expectedDeprecation'];
                    self::$previousErrorHandler = set_error_handler([self::class, 'handleError']);
                    @trigger_error('Since symfony/phpunit-bridge 5.1: Using "@expectedDeprecation" annotations in tests is deprecated, use the "ExpectDeprecationTrait::expectDeprecation()" method instead.', \E_USER_DEPRECATED);
                }

                if ($this->checkNumAssertions) {
                    $this->checkNumAssertions = $test->getTestResultObject()->isStrictAboutTestsThatDoNotTestAnything();
                }