/**
* @covers ::getCacheTags
* @covers ::getCacheTagsToInvalidate
* @covers ::addCacheTags
*/
public function testCacheTags()
{
// Ensure that both methods return the same by default.
$this->assertEquals([$this->entityTypeId . ':' . 1], $this->entity->getCacheTags());
$this->assertEquals([$this->entityTypeId . ':' . 1], $this->entity->getCacheTagsToInvalidate());
// Add an additional cache tag and make sure only getCacheTags() returns
// that.
$this->entity->addCacheTags(['additional_cache_tag']);
// EntityTypeId is random so it can shift order. We need to duplicate the
// sort from \Drupal\Core\Cache\Cache::mergeTags().
$tags = ['additional_cache_tag', $this->entityTypeId . ':' . 1];
sort($tags);
$this->assertEquals($tags, $this->entity->getCacheTags());
$this->assertEquals([$this->entityTypeId . ':' . 1], $this->entity->getCacheTagsToInvalidate());
}
