class YamlDirectoryDiscoveryTest

class YamlDirectoryDiscoveryTest extends TestCase {
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() {
        // Ensure that FileCacheFactory has a prefix.
        FileCacheFactory::setPrefix('prefix');
    }
    
    /**
     * Tests YAML directory discovery.
     *
     * @covers ::findAll
     */
    public function testDiscovery() {
        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();
        $this->assertSame([
            'id' => 'item1',
            'name' => 'test1 item 1',
            YamlDirectoryDiscovery::FILE_KEY => 'vfs://modules/test_1/subdir1/item_1.test.yml',
        ], $data['test_1']['item1']);
        $this->assertSame([
            'id' => 'item2',
            'name' => 'test1 item 2',
            YamlDirectoryDiscovery::FILE_KEY => 'vfs://modules/test_1/subdir2/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/item_3.test.yml',
        ], $data['test_2']['item3']);
        $this->assertCount(1, $data['test_2']);
        $this->assertTrue(empty($data['test_3']), 'test_3 provides 0 items');
        $this->assertSame([
            'id' => 'item4',
            'name' => 'test4 item 4',
            YamlDirectoryDiscovery::FILE_KEY => 'vfs://modules/test_4/subdir1/item_4.test.yml',
        ], $data['test_4']['item4']);
        $this->assertSame([
            'id' => 'item5',
            'name' => 'test4 item 5',
            YamlDirectoryDiscovery::FILE_KEY => 'vfs://modules/test_4/subdir1/item_5.test.yml',
        ], $data['test_4']['item5']);
        $this->assertSame([
            'id' => 'item6',
            'name' => 'test4 item 6',
            YamlDirectoryDiscovery::FILE_KEY => 'vfs://modules/test_4/subdir1/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() {
        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/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() {
        $this->expectException(DiscoveryException::class);
        $this->expectExceptionMessage('The vfs://modules/test_1/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() {
        $this->expectException(DiscoveryException::class);
        $this->expectExceptionMessage('The vfs://modules/test_1/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();
    }

}