class EntityStorageBaseTest

class EntityStorageBaseTest extends UnitTestCase {
  
  /**
   * Generate a mocked entity object.
   *
   * @param string $id
   *   ID value for this entity.
   *
   * @return \Drupal\Core\Entity\EntityInterface|\PHPUnit\Framework\MockObject\MockObject
   *   The mocked entity.
   */
  public function generateEntityInterface($id) {
    $mock_entity = $this->getMockBuilder('\\Drupal\\Core\\Entity\\EntityInterface')
      ->onlyMethods([
      'id',
    ])
      ->getMockForAbstractClass();
    $mock_entity->expects($this->any())
      ->method('id')
      ->willReturn((string) $id);
    return $mock_entity;
  }
  
  /**
   * Data provider for testLoad().
   *
   * @return array
   *   - Expected output of load().
   *   - A fixture of entities to query against. Suitable return value for
   *     loadMultiple().
   *   - The ID we'll query.
   */
  public function providerLoad() {
    $data = [];
    // Data set for a matching value.
    $entity = $this->generateEntityInterface('1');
    $data['matching-value'] = [
      $entity,
      [
        '1' => $entity,
      ],
      '1',
    ];
    // Data set for no matching value.
    $data['no-matching-value'] = [
      NULL,
      [],
      '0',
    ];
    return $data;
  }
  
  /**
   * @covers ::load
   *
   * @dataProvider providerLoad
   */
  public function testLoad($expected, $entity_fixture, $query) {
    $mock_base = $this->getMockBuilder('\\Drupal\\Core\\Entity\\EntityStorageBase')
      ->disableOriginalConstructor()
      ->onlyMethods([
      'loadMultiple',
    ])
      ->getMockForAbstractClass();
    // load() always calls loadMultiple().
    $mock_base->expects($this->once())
      ->method('loadMultiple')
      ->with([
      $query,
    ])
      ->willReturn($entity_fixture);
    $this->assertEquals($expected, $mock_base->load($query));
  }
  
  /**
   * Data provider for testLoadMultiple.
   *
   * @return array
   *   - The expected result.
   *   - Results for doLoadMultiple(), called internally by loadMultiple().
   *   - The query, an array of IDs.
   */
  public function providerLoadMultiple() {
    // Create a fixture of entity objects.
    $fixture = [];
    foreach (range(1, 10) as $index) {
      $fixture[(string) $index] = $this->generateEntityInterface($index);
    }
    $data = [];
    // Data set for NULL ID parameter.
    $data['null-id-parameter'] = [
      $fixture,
      $fixture,
      NULL,
    ];
    // Data set for no results.
    $data['no-results'] = [
      [],
      [],
      [
        '11',
      ],
    ];
    // Data set for 0 results for multiple IDs.
    $data['no-results-multiple-ids'] = [
      [],
      [],
      [
        '11',
        '12',
        '13',
      ],
    ];
    // Data set for 1 result for 1 ID.
    $data['1-result-for-1-id'] = [
      [
        '1' => $fixture['1'],
      ],
      [
        '1' => $fixture['1'],
      ],
      [
        '1',
      ],
    ];
    // Data set for results for all IDs.
    $ids = [
      '1',
      '2',
      '3',
    ];
    foreach ($ids as $id) {
      $expectation[$id] = $fixture[$id];
      $load_multiple[$id] = $fixture[$id];
    }
    $data['results-for-all-ids'] = [
      $expectation,
      $load_multiple,
      $ids,
    ];
    // Data set for partial results for multiple IDs.
    $ids = [
      '1',
      '2',
      '3',
    ];
    foreach ($ids as $id) {
      $expectation[$id] = $fixture[$id];
      $load_multiple[$id] = $fixture[$id];
    }
    $ids = array_merge($ids, [
      '11',
      '12',
    ]);
    $data['partial-results-for-multiple-ids'] = [
      $expectation,
      $load_multiple,
      $ids,
    ];
    return $data;
  }
  
  /**
   * Test loadMultiple().
   *
   * Does not cover statically-cached results.
   *
   * @covers ::loadMultiple
   *
   * @dataProvider providerLoadMultiple
   */
  public function testLoadMultiple($expected, $load_multiple, $query) {
    // Make our EntityStorageBase mock.
    $mock_base = $this->getMockBuilder('\\Drupal\\Core\\Entity\\EntityStorageBase')
      ->disableOriginalConstructor()
      ->onlyMethods([
      'doLoadMultiple',
      'postLoad',
    ])
      ->getMockForAbstractClass();
    // For all non-cached queries, we call doLoadMultiple().
    $mock_base->expects($this->once())
      ->method('doLoadMultiple')
      ->with($query)
      ->willReturn($load_multiple);
    // Make our EntityTypeInterface mock so that we can turn off static caching.
    $mock_entity_type = $this->getMockBuilder('\\Drupal\\Core\\Entity\\EntityTypeInterface')
      ->onlyMethods([
      'isStaticallyCacheable',
    ])
      ->getMockForAbstractClass();
    // Disallow caching.
    $mock_entity_type->expects($this->any())
      ->method('isStaticallyCacheable')
      ->willReturn(FALSE);
    // Add the EntityTypeInterface to the storage object.
    $ref_entity_type = new \ReflectionProperty($mock_base, 'entityType');
    $ref_entity_type->setAccessible(TRUE);
    $ref_entity_type->setValue($mock_base, $mock_entity_type);
    // Set up expectations for postLoad(), which we only call if there are
    // results from loadMultiple().
    $mock_base->expects($this->exactly(empty($load_multiple) ? 0 : 1))
      ->method('postLoad');
    $this->assertEquals($expected, $mock_base->loadMultiple($query));
  }

}