Google\Cloud\Tests\System\BigQuery\BigQueryTestCase::tearDownFixtures PHP Method

    public static function tearDownFixtures()
    {
        if (!self::$hasSetUp) {
            return;
        }
        self::$deletionQueue[] = self::$bucket;
        self::$deletionQueue[] = self::$table;
        self::$deletionQueue[] = self::$dataset;
        $backoff = new ExponentialBackoff(8);
        foreach (self::$deletionQueue as $item) {
            $backoff->execute(function () use($item) {
                $item->delete();
            });
        }
    }

<?php

require __DIR__ . '/../../vendor/autoload.php';
use Google\Cloud\Tests\System\PubSub\PubSubTestCase;
use Google\Cloud\Tests\System\Datastore\DatastoreTestCase;
use Google\Cloud\Tests\System\Storage\StorageTestCase;
use Google\Cloud\Tests\System\Logging\LoggingTestCase;
use Google\Cloud\Tests\System\BigQuery\BigQueryTestCase;
if (!getenv('GOOGLE_CLOUD_PHP_TESTS_KEY_PATH')) {
    throw new \Exception('Please set the \'GOOGLE_CLOUD_PHP_TESTS_KEY_PATH\' env var to run the system tests');
}
register_shutdown_function(function () {
    PubSubTestCase::tearDownFixtures();
    DatastoreTestCase::tearDownFixtures();
    StorageTestCase::tearDownFixtures();
    LoggingTestCase::tearDownFixtures();
    BigQueryTestCase::tearDownFixtures();
});