class WorkspaceMergerTest

class WorkspaceMergerTest extends KernelTestBase {
    use ContentTypeCreationTrait;
    use NodeCreationTrait;
    use UserCreationTrait;
    use WorkspaceTestTrait;
    
    /**
     * The entity type manager.
     *
     * @var \Drupal\Core\Entity\EntityTypeManagerInterface
     */
    protected $entityTypeManager;
    
    /**
     * An array of nodes created before installing the Workspaces module.
     *
     * @var \Drupal\node\NodeInterface[]
     */
    protected $nodes = [];
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'field',
        'filter',
        'node',
        'text',
        'user',
        'system',
        'path_alias',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->entityTypeManager = \Drupal::entityTypeManager();
        $this->installEntitySchema('node');
        $this->installEntitySchema('user');
        $this->installConfig([
            'filter',
            'node',
            'system',
        ]);
        $this->installSchema('system', [
            'sequences',
        ]);
        $this->installSchema('node', [
            'node_access',
        ]);
        $this->createContentType([
            'type' => 'article',
        ]);
        $this->setCurrentUser($this->createUser([
            'administer nodes',
        ]));
    }
    
    /**
     * Tests workspace merging.
     *
     * @covers ::merge
     * @covers ::getNumberOfChangesOnSource
     * @covers ::getNumberOfChangesOnTarget
     * @covers ::getDifferringRevisionIdsOnSource
     * @covers ::getDifferringRevisionIdsOnTarget
     */
    public function testWorkspaceMerger() {
        $this->initializeWorkspacesModule();
        $this->createWorkspaceHierarchy();
        // Generate content in the workspace hierarchy with the following structure:
        // Live:
        // - Test article 1 - live
        //
        // Stage:
        // - Test article 2 - stage
        //
        // Dev:
        // - Test article 2 - stage
        // - Test article 3 - dev
        //
        // Local 1:
        // - Test article 2 - stage
        // - Test article 3 - dev
        // - Test article 4 - local_1
        //
        // Local 2:
        // - Test article 2 - stage
        // - Test article 3 - dev
        //
        // Note that the contents of each workspace are inherited automatically in
        // each of its descendants.
        $this->createNode([
            'title' => 'Test article 1 - live',
            'type' => 'article',
        ]);
        // This creates revisions 2 and 3. Revision 2 is an unpublished default
        // revision (which is also available in Live), and revision 3 is a published
        // pending revision that is available in Stage and all its descendants.
        $this->switchToWorkspace('stage');
        $this->createNode([
            'title' => 'Test article 2 - stage',
            'type' => 'article',
        ]);
        $expected_workspace_association = [
            'stage' => [
                3,
            ],
            'dev' => [
                3,
            ],
            'local_1' => [
                3,
            ],
            'local_2' => [
                3,
            ],
            'qa' => [],
        ];
        $this->assertWorkspaceAssociation($expected_workspace_association, 'node');
        // Create the second test article in Dev. This creates revisions 4 and 5.
        // Revision 4 is default and unpublished, and revision 5 is now being
        // tracked in Dev and its descendants.
        $this->switchToWorkspace('dev');
        $this->createNode([
            'title' => 'Test article 3 - dev',
            'type' => 'article',
        ]);
        $expected_workspace_association = [
            'stage' => [
                3,
            ],
            'dev' => [
                3,
                5,
            ],
            'local_1' => [
                3,
                5,
            ],
            'local_2' => [
                3,
                5,
            ],
            'qa' => [],
        ];
        $this->assertWorkspaceAssociation($expected_workspace_association, 'node');
        // Create the third article in Local 1. This creates revisions 6 and 7.
        // Revision 6 is default and unpublished, and revision 7 is now being
        // tracked in the Local 1.
        $this->switchToWorkspace('local_1');
        $this->createNode([
            'title' => 'Test article 4 - local_1',
            'type' => 'article',
        ]);
        $expected_workspace_association = [
            'stage' => [
                3,
            ],
            'dev' => [
                3,
                5,
            ],
            'local_1' => [
                3,
                5,
                7,
            ],
            'local_2' => [
                3,
                5,
            ],
            'qa' => [],
        ];
        $this->assertWorkspaceAssociation($expected_workspace_association, 'node');
        
        /** @var \Drupal\workspaces\WorkspaceMergerInterface $workspace_merger */
        $workspace_merger = \Drupal::service('workspaces.operation_factory')->getMerger($this->workspaces['local_1'], $this->workspaces['dev']);
        // Check that there is no content in Dev that's not also in Local 1.
        $this->assertEmpty($workspace_merger->getDifferringRevisionIdsOnTarget());
        $this->assertEquals(0, $workspace_merger->getNumberOfChangesOnTarget());
        // Check that there is only one node in Local 1 that's not available in Dev,
        // revision 7 created above for the fourth test article.
        $expected = [
            'node' => [
                7 => 4,
            ],
        ];
        $this->assertEquals($expected, $workspace_merger->getDifferringRevisionIdsOnSource());
        $this->assertEquals(1, $workspace_merger->getNumberOfChangesOnSource());
        // Merge the contents of Local 1 into Dev, and check that Dev, Local 1 and
        // Local 2 have the same content.
        $workspace_merger->merge();
        $this->assertEmpty($workspace_merger->getDifferringRevisionIdsOnTarget());
        $this->assertEquals(0, $workspace_merger->getNumberOfChangesOnTarget());
        $this->assertEmpty($workspace_merger->getDifferringRevisionIdsOnSource());
        $this->assertEquals(0, $workspace_merger->getNumberOfChangesOnSource());
        $this->switchToWorkspace('dev');
        $expected_workspace_association = [
            'stage' => [
                3,
            ],
            'dev' => [
                3,
                5,
                7,
            ],
            'local_1' => [
                3,
                5,
                7,
            ],
            'local_2' => [
                3,
                5,
                7,
            ],
            'qa' => [],
        ];
        $this->assertWorkspaceAssociation($expected_workspace_association, 'node');
        $workspace_merger = \Drupal::service('workspaces.operation_factory')->getMerger($this->workspaces['local_1'], $this->workspaces['stage']);
        // Check that there is no content in Stage that's not also in Local 1.
        $this->assertEmpty($workspace_merger->getDifferringRevisionIdsOnTarget());
        $this->assertEquals(0, $workspace_merger->getNumberOfChangesOnTarget());
        // Check that the difference between Local 1 and Stage are the two revisions
        // for 'Test article 3 - dev' and 'Test article 4 - local_1'.
        $expected = [
            'node' => [
                5 => 3,
                7 => 4,
            ],
        ];
        $this->assertEquals($expected, $workspace_merger->getDifferringRevisionIdsOnSource());
        $this->assertEquals(2, $workspace_merger->getNumberOfChangesOnSource());
        // Check that Local 1 can not be merged directly into Stage, since it can
        // only be merged into its direct parent.
        $this->expectException(\InvalidArgumentException::class);
        $this->expectExceptionMessage('The contents of a workspace can only be merged into its parent workspace.');
        $workspace_merger->merge();
    }

}