class CacheTagsInvalidatorTest

class CacheTagsInvalidatorTest extends UnitTestCase {
  
  /**
   * @covers ::invalidateTags
   */
  public function testInvalidateTagsWithInvalidTags() : void {
    $cache_tags_invalidator = new CacheTagsInvalidator();
    $this->expectException(\AssertionError::class);
    $cache_tags_invalidator->invalidateTags([
      'node' => [
        2,
        3,
        5,
        8,
        13,
      ],
    ]);
  }
  
  /**
   * @covers ::invalidateTags
   * @covers ::addInvalidator
   * @covers ::addBin
   */
  public function testInvalidateTags() : void {
    $cache_tags_invalidator = new CacheTagsInvalidator();
    $invalidator_cache_bin = $this->createMock(InvalidatingCacheBackendInterface::class);
    $invalidator_cache_bin->expects($this->once())
      ->method('invalidateTags')
      ->with([
      'node:1',
    ]);
    $cache_tags_invalidator->addBin($invalidator_cache_bin);
    // We do not have to define that invalidateTags() is never called as the
    // interface does not define that method, trying to call it would result in
    // a fatal error.
    $non_invalidator_cache_bin = $this->createMock(CacheBackendInterface::class);
    $cache_tags_invalidator->addBin($non_invalidator_cache_bin);
    $invalidator = $this->createMock(CacheTagsInvalidatorInterface::class);
    $invalidator->expects($this->once())
      ->method('invalidateTags')
      ->with([
      'node:1',
    ]);
    $cache_tags_invalidator->addInvalidator($invalidator);
    $cache_tags_invalidator->invalidateTags([
      'node:1',
    ]);
  }

}