function PreWarmerTest::testPreWarmOneCache

Tests prewarming one cache at a time.

File

core/tests/Drupal/KernelTests/Core/PreWarm/PreWarmerTest.php, line 30

Class

PreWarmerTest

Tests the cache prewarmer.

Namespace

Code

public function testPreWarmOneCache() : void {
  $prewarmer = \Drupal::service('cache_prewarmer');
  // Make sure at least one prewarmable service actually gets called.
  $called = FALSE;
  while ($prewarmer->preWarmOneCache()) {
    $called = TRUE;
  }
  $this->assertTrue($called);
  $this->assertFalse($prewarmer->preWarmOneCache());
}