StubPDO example

  public function testBuildTags($prefix, array $suffixes, array $expected, $glue = ':') {
    $this->assertEquals($expected, Cache::buildTags($prefix, $suffixes, $glue));
  }

  /** * @covers ::keyFromQuery * @group legacy */
  public function testKeyFromQuery() {
    $this->expectDeprecation('Drupal\Core\Cache\Cache::keyFromQuery is deprecated in drupal:10.1.0 and is removed from drupal:11.0.0. No replacement provided. https://www.drupal.org/node/3322044');
    $query = new Select(new StubConnection(new StubPDO(), []), 'dne');
    Cache::keyFromQuery($query);
  }

}