function TopBarPerformanceTest::testTopBarPerformance

Tests performance for anonymous users is not affected by the Top Bar.

File

core/modules/navigation/tests/src/FunctionalJavascript/TopBarPerformanceTest.php, line 39

Class

TopBarPerformanceTest

Tests the performance impacts of navigation module.

Namespace

Code

public function testTopBarPerformance() : void {
    // Request the front page, then immediately clear all object caches, so that
    // aggregates and image styles are created on disk but otherwise caches are
    // empty.
    $this->drupalGet('');
    // Give time for big pipe placeholders, asset aggregate requests, and post
    // response tasks to finish processing and write to any caches before
    // clearing caches again.
    sleep(2);
    foreach (Cache::getBins() as $bin) {
        $bin->deleteAll();
    }
    // Gather performance data before enabling navigation_top_bar.
    $performance_data_before_top_bar = $this->collectPerformanceData(function () {
        $this->drupalGet('');
    }, 'navigationFrontPageTopBarDisabled');
    // Install navigation_top_bar module.
    \Drupal::service('module_installer')->install([
        'navigation_top_bar',
    ]);
    // Clear caches to prep for another performance data collect.
    foreach (Cache::getBins() as $bin) {
        $bin->deleteAll();
    }
    // Gather performance data after enabling navigation_top_bar.
    $performance_data_after_top_bar = $this->collectPerformanceData(function () {
        $this->drupalGet('');
    }, 'navigationFrontPageTopBarEnabled');
    // Ensure that there is no change to performance metrics from the Top Bar.
    // Anonymous users should never see the Top Bar.
    $this->assertMetrics([
        'QueryCount' => $performance_data_before_top_bar->getQueryCount(),
        'CacheGetCount' => $performance_data_before_top_bar->getCacheGetCount(),
        'CacheSetCount' => $performance_data_before_top_bar->getCacheSetCount(),
        'CacheDeleteCount' => $performance_data_before_top_bar->getCacheDeleteCount(),
        'CacheTagChecksumCount' => $performance_data_before_top_bar->getCacheTagChecksumCount(),
        'CacheTagIsValidCount' => $performance_data_before_top_bar->getCacheTagIsValidCount(),
        'CacheTagInvalidationCount' => $performance_data_before_top_bar->getCacheTagInvalidationCount(),
    ], $performance_data_after_top_bar);
}