function ErrorHandlerTest::testCustomErrorHandler

Tests a custom error handler set in settings.php.

File

core/modules/system/tests/src/Functional/System/ErrorHandlerTest.php, line 98

Class

ErrorHandlerTest

Performs tests on the Drupal error and exception handler.

Namespace

Code

public function testCustomErrorHandler() : void {
    $settings_filename = $this->siteDirectory . '/settings.php';
    chmod($settings_filename, 0777);
    $settings_php = file_get_contents($settings_filename);
    $settings_php .= "\n";
    $settings_php .= "set_error_handler(function() {\n";
    $settings_php .= "  header('HTTP/1.1 418 I\\'m a teapot');\n";
    $settings_php .= "  print('Oh oh, flying teapots from a custom error handler');\n";
    $settings_php .= "  exit();\n";
    $settings_php .= "});\n";
    file_put_contents($settings_filename, $settings_php);
    // For most types of errors, PHP throws an \Error object that Drupal
    // catches, so the error handler is not invoked. To test the error handler,
    // generate warnings, which are not thrown/caught.
    $this->drupalGet('error-test/generate-warnings');
    $this->assertSession()
        ->statusCodeEquals(418);
    $this->assertSession()
        ->responseContains('Oh oh, flying teapots from a custom error handler');
}