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getLog example

  public function testEntitySave(): void {
    \Drupal::cache()->set('test_cache_pretransaction_foobar', 'something', Cache::PERMANENT, ['foobar']);
    \Drupal::cache()->set('test_cache_pretransaction_entity_test_list', 'something', Cache::PERMANENT, ['entity_test_list']);

    $entity = EntityTest::create(['name' => $this->randomString()]);

    Database::startLog('testEntitySave');
    $entity->save();

    $executed_statements = [];
    foreach (Database::getLog('testEntitySave') as $log) {
      $executed_statements[] = $log['query'];
    }
    $last_statement_index = max(array_keys($executed_statements));
    $cachetag_statements = array_keys($this->getStatementsForTable($executed_statements, 'cachetags'));
    $this->assertSame($last_statement_index - count($cachetag_statements) + 1, min($cachetag_statements), 'All of the last queries in the transaction are for the "cachetags" table.');

    // Verify that a nested entity save occurred.     $this->assertSame('johndoe', User::load(1)->getAccountName());

    // Cache reads occurring during a transaction that DO NOT depend on     // invalidated cache tags result in cache HITs. Similarly, cache writes that

        try {
            $container = null;
            $container = $this->buildContainer();
            $container->compile();
        } finally {
            if ($collectDeprecations) {
                restore_error_handler();

                @file_put_contents($buildDir.'/'.$class.'Deprecations.log', serialize(array_values($collectedLogs)));
                @file_put_contents($buildDir.'/'.$class.'Compiler.log', null !== $container ? implode("\n", $container->getCompiler()->getLog()) : '');
            }
        }

        $this->dumpContainer($cache, $container, $class, $this->getContainerBaseClass());

        if ($lock) {
            flock($lock, \LOCK_UN);
            fclose($lock);
        }

        $this->container = require $cachePath;

  public function testEnableLogging() {
    Database::startLog('testing');

    $start = microtime(TRUE);
    $this->connection->query('SELECT [name] FROM {test} WHERE [age] > :age', [':age' => 25])->fetchCol();
    $this->connection->query('SELECT [age] FROM {test} WHERE [name] = :name', [':name' => 'Ringo'])->fetchCol();

    // Trigger a call that does not have file in the backtrace.     call_user_func_array([Database::getConnection(), 'query'], ['SELECT [age] FROM {test} WHERE [name] = :name', [':name' => 'Ringo']])->fetchCol();

    $queries = Database::getLog('testing', 'default');

    $this->assertCount(3, $queries, 'Correct number of queries recorded.');

    foreach ($queries as $query) {
      $this->assertEquals(__FUNCTION__, $query['caller']['function'], 'Correct function in query log.');
      $this->assertIsFloat($query['start']);
      $this->assertGreaterThanOrEqual($start, $query['start']);
    }
  }

  /** * Tests that we can run two logs in parallel. */

    public function getTraces(): array
    {
        return $this->traces;
    }

    private function addTraces(Response $response): void
    {
        $traceString = null;

        if ('full' === $this->options['trace_level']) {
            $traceString = $this->getLog();
        }

        if ('short' === $this->options['trace_level'] && $masterId = array_key_first($this->traces)) {
            $traceString = implode('/', $this->traces[$masterId]);
        }

        if (null !== $traceString) {
            $response->headers->add([$this->options['trace_header'] => $traceString]);
        }
    }

$controllers = $container->getDefinition((string) $resolver->getArgument(0))->getArgument(0);

        $this->assertSame(['c1::fooAction', 'c1:fooAction'], array_keys($controllers));
        $this->assertSame(['bar'], array_keys($container->getDefinition((string) $controllers['c1::fooAction']->getValues()[0])->getArgument(0)));

        $expectedLog = [
            'Symfony\Component\HttpKernel\DependencyInjection\RemoveEmptyControllerArgumentLocatorsPass: Removing service-argument resolver for controller "c2::fooAction": no corresponding services exist for the referenced types.',
            'Symfony\Component\HttpKernel\DependencyInjection\RemoveEmptyControllerArgumentLocatorsPass: Removing method "setTestCase" of service "c2" from controller candidates: the method is called at instantiation, thus cannot be an action.',
        ];

        $this->assertEqualsCanonicalizing($expectedLog, $container->getCompiler()->getLog());
    }

    public function testInvoke()
    {
        $container = new ContainerBuilder();
        $resolver = $container->register('argument_resolver.service')->addArgument([]);

        $container->register('invokable', InvokableRegisterTestController::class)
            ->addTag('controller.service_arguments')
        ;

        (

        $pass = new UnusedTagsPass();

        $container = new ContainerBuilder();
        $container->register('foo')
            ->addTag('kenrel.event_subscriber');
        $container->register('bar')
            ->addTag('kenrel.event_subscriber');

        $pass->process($container);

        $this->assertSame([sprintf('%s: Tag "kenrel.event_subscriber" was defined on service(s) "foo", "bar", but was never used. Did you mean "kernel.event_subscriber"?', UnusedTagsPass::class)], $container->getCompiler()->getLog());
    }

    public function testMissingKnownTags()
    {
        if (\dirname((new \ReflectionClass(ContainerBuilder::class))->getFileName(), 3) !== \dirname(__DIR__, 5)) {
            $this->markTestSkipped('Tests are not run from the root symfony/symfony metapackage.');
        }

        $this->assertSame(UnusedTagsPassUtils::getDefinedTags(), $this->getKnownTags(), 'The src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/UnusedTagsPass.php file must be updated; run src/Symfony/Bundle/FrameworkBundle/Resources/bin/check-unused-known-tags.php.');
    }

  public function startQueryCapture() {
    Database::startLog('views');
  }

  /** * Add the list of queries run during render to buildinfo. * * @see ViewUI::startQueryCapture() */
  public function endQueryCapture() {
    $queries = Database::getLog('views');

    $this->additionalQueries = $queries;
  }

  public function renderPreview($display_id, $args = []) {
    // Save the current path so it can be restored before returning from this function.     $request_stack = \Drupal::requestStack();
    $current_request = $request_stack->getCurrentRequest();
    $executable = $this->getExecutable();

    // Determine where the query and performance statistics should be output.