Neos\Cache\Tests\Unit\Frontend\AbstractFrontendTest::flushCallsBackend PHP Метод

    public function flushCallsBackend()
    {
        $identifier = 'someCacheIdentifier';
        $backend = $this->getMockBuilder(AbstractBackend::class)->setMethods(['get', 'set', 'has', 'remove', 'findIdentifiersByTag', 'flush', 'flushByTag', 'collectGarbage'])->disableOriginalConstructor()->getMock();
        $backend->expects($this->once())->method('flush');
        $cache = $this->getMockBuilder(StringFrontend::class)->setMethods(['__construct', 'get', 'set', 'has', 'remove', 'getByTag'])->setConstructorArgs([$identifier, $backend])->getMock();
        $cache->flush();
    }