function ChainedFastBackendTest::testFallThroughToConsistentCache

Tests a fast cache miss gets data from the consistent cache backend.

File

core/tests/Drupal/Tests/Core/Cache/ChainedFastBackendTest.php, line 192

Class

ChainedFastBackendTest

Tests Drupal\Core\Cache\ChainedFastBackend.

Namespace

Code

public function testFallThroughToConsistentCache() : void {
  // Make the last_write_timestamp two seconds in the past so that everything
  // is written back to the fast backend.
  $timestamp_item = (object) [
    'cid' => ChainedFastBackend::LAST_WRITE_TIMESTAMP_PREFIX . 'cache_foo',
    'data' => time() - 2,
  ];
  $cache_item = (object) [
    'cid' => 'foo',
    'data' => 'baz',
    // The created time is set one minute in the past, e.g. before the
    // consistent timestamp.
'created' => time() - 60,
    'expire' => time() + 3600,
    'tags' => [
      'tag',
    ],
  ];
  $consistent_cache = $this->createMock(CacheBackendInterface::class);
  $fast_cache = $this->createMock(CacheBackendInterface::class);
  // We should get a call for the timestamp on the consistent backend.
  $consistent_cache->expects($this->once())
    ->method('get')
    ->with($timestamp_item->cid)
    ->willReturn($timestamp_item);
  // We should get a call for the cache item on the consistent backend.
  $consistent_cache->expects($this->once())
    ->method('getMultiple')
    ->with([
    $cache_item->cid,
  ])
    ->willReturn([
    $cache_item->cid => $cache_item,
  ]);
  // We should get a call for the cache item on the fast backend.
  $fast_cache->expects($this->once())
    ->method('getMultiple')
    ->with([
    $cache_item->cid,
  ])
    ->willReturn([
    $cache_item->cid => $cache_item,
  ]);
  // We should get a call to set the cache item on the fast backend.
  $fast_cache->expects($this->once())
    ->method('set')
    ->with($cache_item->cid, $cache_item->data, $cache_item->expire);
  $chained_fast_backend = new ChainedFastBackend($consistent_cache, $fast_cache, 'foo');
  $this->assertEquals('baz', $chained_fast_backend->get('foo')->data);
}