class YamlDirectoryDiscoveryTest

class YamlDirectoryDiscoveryTest extends TestCase {
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    // Ensure that FileCacheFactory has a prefix.
    FileCacheFactory::setPrefix('prefix');
  }
  
  /**
   * Tests YAML directory discovery.
   *
   * @covers ::findAll
   */
  public function testDiscovery() : void {
    vfsStream::setup('modules', NULL, [
      'test_1' => [
        'subdir1' => [
          'item_1.test.yml' => "id: item1\nname: 'test1 item 1'",
        ],
        'subdir2' => [
          'item_2.test.yml' => "id: item2\nname: 'test1 item 2'",
        ],
      ],
      'test_2' => [
        'subdir1' => [
          'item_3.test.yml' => "id: item3\nname: 'test2 item 3'",
        ],
        'subdir2' => [],
      ],
      'test_3' => [],
      'test_4' => [
        'subdir1' => [
          'item_4.test.yml' => "id: item4\nname: 'test4 item 4'",
          'item_5.test.yml' => "id: item5\nname: 'test4 item 5'",
          'item_6.test.yml' => "id: item6\nname: 'test4 item 6'",
        ],
      ],
    ]);
    // Set up the directories to search.
    $directories = [
      // Multiple directories both with valid items.
'test_1' => [
        vfsStream::url('modules/test_1/subdir1'),
        vfsStream::url('modules/test_1/subdir2'),
      ],
      // The subdir2 directory is empty.
'test_2' => [
        vfsStream::url('modules/test_2/subdir1'),
        vfsStream::url('modules/test_2/subdir2'),
      ],
      // Directories that do not exist.
'test_3' => [
        vfsStream::url('modules/test_3/subdir1'),
        vfsStream::url('modules/test_3/subdir2'),
      ],
      // A single directory.
'test_4' => vfsStream::url('modules/test_4/subdir1'),
    ];
    $discovery = new YamlDirectoryDiscovery($directories, 'test');
    $data = $discovery->findAll();
    // The file path is dependent on the operating system, so we adjust the directory separator.
    $this->assertSame([
      'id' => 'item1',
      'name' => 'test1 item 1',
      YamlDirectoryDiscovery::FILE_KEY => 'vfs://modules/test_1/subdir1' . DIRECTORY_SEPARATOR . 'item_1.test.yml',
    ], $data['test_1']['item1']);
    $this->assertSame([
      'id' => 'item2',
      'name' => 'test1 item 2',
      YamlDirectoryDiscovery::FILE_KEY => 'vfs://modules/test_1/subdir2' . DIRECTORY_SEPARATOR . 'item_2.test.yml',
    ], $data['test_1']['item2']);
    $this->assertCount(2, $data['test_1']);
    $this->assertSame([
      'id' => 'item3',
      'name' => 'test2 item 3',
      YamlDirectoryDiscovery::FILE_KEY => 'vfs://modules/test_2/subdir1' . DIRECTORY_SEPARATOR . 'item_3.test.yml',
    ], $data['test_2']['item3']);
    $this->assertCount(1, $data['test_2']);
    $this->assertArrayNotHasKey('test_3', $data, 'test_3 provides 0 items');
    $this->assertSame([
      'id' => 'item4',
      'name' => 'test4 item 4',
      YamlDirectoryDiscovery::FILE_KEY => 'vfs://modules/test_4/subdir1' . DIRECTORY_SEPARATOR . 'item_4.test.yml',
    ], $data['test_4']['item4']);
    $this->assertSame([
      'id' => 'item5',
      'name' => 'test4 item 5',
      YamlDirectoryDiscovery::FILE_KEY => 'vfs://modules/test_4/subdir1' . DIRECTORY_SEPARATOR . 'item_5.test.yml',
    ], $data['test_4']['item5']);
    $this->assertSame([
      'id' => 'item6',
      'name' => 'test4 item 6',
      YamlDirectoryDiscovery::FILE_KEY => 'vfs://modules/test_4/subdir1' . DIRECTORY_SEPARATOR . 'item_6.test.yml',
    ], $data['test_4']['item6']);
    $this->assertCount(3, $data['test_4']);
  }
  
  /**
   * Tests YAML directory discovery with an alternate ID key.
   *
   * @covers ::findAll
   */
  public function testDiscoveryAlternateId() : void {
    vfsStream::setup('modules', NULL, [
      'test_1' => [
        'item_1.test.yml' => "alt_id: item1\nid: ignored",
      ],
    ]);
    // Set up the directories to search.
    $directories = [
      'test_1' => vfsStream::url('modules/test_1'),
    ];
    $discovery = new YamlDirectoryDiscovery($directories, 'test', 'alt_id');
    $data = $discovery->findAll();
    $this->assertSame([
      'alt_id' => 'item1',
      'id' => 'ignored',
      YamlDirectoryDiscovery::FILE_KEY => 'vfs://modules/test_1' . DIRECTORY_SEPARATOR . 'item_1.test.yml',
    ], $data['test_1']['item1']);
    $this->assertCount(1, $data['test_1']);
  }
  
  /**
   * Tests YAML directory discovery with a missing ID key.
   *
   * @covers ::findAll
   * @covers ::getIdentifier
   */
  public function testDiscoveryNoIdException() : void {
    $this->expectException(DiscoveryException::class);
    $this->expectExceptionMessage('The vfs://modules/test_1' . DIRECTORY_SEPARATOR . 'item_1.test.yml contains no data in the identifier key \'id\'');
    vfsStream::setup('modules', NULL, [
      'test_1' => [
        'item_1.test.yml' => "",
      ],
    ]);
    // Set up the directories to search.
    $directories = [
      'test_1' => vfsStream::url('modules/test_1'),
    ];
    $discovery = new YamlDirectoryDiscovery($directories, 'test');
    $discovery->findAll();
  }
  
  /**
   * Tests YAML directory discovery with invalid YAML.
   *
   * @covers ::findAll
   */
  public function testDiscoveryInvalidYamlException() : void {
    $this->expectException(DiscoveryException::class);
    $this->expectExceptionMessage('The vfs://modules/test_1' . DIRECTORY_SEPARATOR . 'item_1.test.yml contains invalid YAML');
    vfsStream::setup('modules', NULL, [
      'test_1' => [
        'item_1.test.yml' => "id: invalid\nfoo : [bar}",
      ],
    ]);
    // Set up the directories to search.
    $directories = [
      'test_1' => vfsStream::url('modules/test_1'),
    ];
    $discovery = new YamlDirectoryDiscovery($directories, 'test');
    $discovery->findAll();
  }

}