class BlockPageVariantTest

class BlockPageVariantTest extends UnitTestCase {
    
    /**
     * The block repository.
     *
     * @var \Drupal\block\BlockRepositoryInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $blockRepository;
    
    /**
     * The block view builder.
     *
     * @var \Drupal\Core\Entity\EntityViewBuilderInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $blockViewBuilder;
    
    /**
     * The plugin context handler.
     *
     * @var \Drupal\Core\Plugin\Context\ContextHandlerInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $contextHandler;
    
    /**
     * Sets up a display variant plugin for testing.
     *
     * @param array $configuration
     *   An array of plugin configuration.
     * @param array $definition
     *   The plugin definition array.
     *
     * @return \Drupal\block\Plugin\DisplayVariant\BlockPageVariant
     *   A test display variant plugin.
     */
    public function setUpDisplayVariant($configuration = [], $definition = []) {
        $container = new Container();
        $cache_context_manager = $this->getMockBuilder('Drupal\\Core\\Cache\\Context\\CacheContextsManager')
            ->disableOriginalConstructor()
            ->onlyMethods([
            'assertValidTokens',
        ])
            ->getMock();
        $container->set('cache_contexts_manager', $cache_context_manager);
        $cache_context_manager->expects($this->any())
            ->method('assertValidTokens')
            ->willReturn(TRUE);
        \Drupal::setContainer($container);
        $this->blockRepository = $this->createMock('Drupal\\block\\BlockRepositoryInterface');
        $this->blockViewBuilder = $this->createMock('Drupal\\Core\\Entity\\EntityViewBuilderInterface');
        return new BlockPageVariant($configuration, 'test', $definition, $this->blockRepository, $this->blockViewBuilder, [
            'config:block_list',
        ]);
    }
    public static function providerBuild() {
        $blocks_config = [
            'block1' => [
                // region, is main content block, is messages block, is title block
'top',
                FALSE,
                FALSE,
                FALSE,
            ],
            // Test multiple blocks in the same region.
'block2' => [
                'bottom',
                FALSE,
                FALSE,
                FALSE,
            ],
            'block3' => [
                'bottom',
                FALSE,
                FALSE,
                FALSE,
            ],
            // Test a block implementing MainContentBlockPluginInterface.
'block4' => [
                'center',
                TRUE,
                FALSE,
                FALSE,
            ],
            // Test a block implementing MessagesBlockPluginInterface.
'block5' => [
                'center',
                FALSE,
                TRUE,
                FALSE,
            ],
            // Test a block implementing TitleBlockPluginInterface.
'block6' => [
                'center',
                FALSE,
                FALSE,
                TRUE,
            ],
        ];
        $test_cases = [];
        $test_cases[] = [
            $blocks_config,
            6,
            [
                '#cache' => [
                    'tags' => [
                        'config:block_list',
                        'route',
                    ],
                    'contexts' => [],
                    'max-age' => -1,
                ],
                'top' => [
                    'block1' => [],
                    '#sorted' => TRUE,
                ],
                // The main content was rendered via a block.
'center' => [
                    'block4' => [],
                    'block5' => [],
                    'block6' => [],
                    '#sorted' => TRUE,
                ],
                'bottom' => [
                    'block2' => [],
                    'block3' => [],
                    '#sorted' => TRUE,
                ],
            ],
        ];
        unset($blocks_config['block5']);
        $test_cases[] = [
            $blocks_config,
            5,
            [
                '#cache' => [
                    'tags' => [
                        'config:block_list',
                        'route',
                    ],
                    'contexts' => [],
                    'max-age' => -1,
                ],
                'top' => [
                    'block1' => [],
                    '#sorted' => TRUE,
                ],
                'center' => [
                    'block4' => [],
                    'block6' => [],
                    '#sorted' => TRUE,
                ],
                'bottom' => [
                    'block2' => [],
                    'block3' => [],
                    '#sorted' => TRUE,
                ],
                // The messages are rendered via the fallback in case there is no block
                // rendering the main content.
'content' => [
                    'messages' => [
                        '#weight' => -1000,
                        '#type' => 'status_messages',
                        '#include_fallback' => TRUE,
                    ],
                ],
            ],
        ];
        unset($blocks_config['block4']);
        unset($blocks_config['block6']);
        $test_cases[] = [
            $blocks_config,
            3,
            [
                '#cache' => [
                    'tags' => [
                        'config:block_list',
                        'route',
                    ],
                    'contexts' => [],
                    'max-age' => -1,
                ],
                'top' => [
                    'block1' => [],
                    '#sorted' => TRUE,
                ],
                'bottom' => [
                    'block2' => [],
                    'block3' => [],
                    '#sorted' => TRUE,
                ],
                // The main content & messages are rendered via the fallback in case
                // there are no blocks rendering them.
'content' => [
                    'system_main' => [
                        '#markup' => 'Hello kittens!',
                    ],
                    'messages' => [
                        '#weight' => -1000,
                        '#type' => 'status_messages',
                        '#include_fallback' => TRUE,
                    ],
                ],
            ],
        ];
        return $test_cases;
    }
    
    /**
     * Tests the building of a full page variant.
     *
     * @covers ::build
     *
     * @dataProvider providerBuild
     */
    public function testBuild(array $blocks_config, $visible_block_count, array $expected_render_array) : void {
        $display_variant = $this->setUpDisplayVariant();
        $display_variant->setMainContent([
            '#markup' => 'Hello kittens!',
        ]);
        $blocks = [
            'top' => [],
            'center' => [],
            'bottom' => [],
        ];
        $block_plugin = $this->createMock('Drupal\\Core\\Block\\BlockPluginInterface');
        $main_content_block_plugin = $this->createMock('Drupal\\Core\\Block\\MainContentBlockPluginInterface');
        $messages_block_plugin = $this->createMock('Drupal\\Core\\Block\\MessagesBlockPluginInterface');
        $title_block_plugin = $this->createMock('Drupal\\Core\\Block\\TitleBlockPluginInterface');
        foreach ($blocks_config as $block_id => $block_config) {
            $block = $this->createMock('Drupal\\block\\BlockInterface');
            $block->expects($this->atLeastOnce())
                ->method('getPlugin')
                ->willReturn($block_config[1] ? $main_content_block_plugin : ($block_config[2] ? $messages_block_plugin : ($block_config[3] ? $title_block_plugin : $block_plugin)));
            $blocks[$block_config[0]][$block_id] = $block;
        }
        $this->blockViewBuilder
            ->expects($this->exactly($visible_block_count))
            ->method('view')
            ->willReturn([]);
        $this->blockRepository
            ->expects($this->once())
            ->method('getVisibleBlocksPerRegion')
            ->willReturnCallback(function (&$cacheable_metadata) use ($blocks) {
            $cacheable_metadata['top'] = (new CacheableMetadata())->addCacheTags([
                'route',
            ]);
            return $blocks;
        });
        $value = $display_variant->build();
        $this->assertSame($expected_render_array, $value);
    }
    
    /**
     * Tests the building of a full page variant with no main content set.
     *
     * @covers ::build
     */
    public function testBuildWithoutMainContent() : void {
        $display_variant = $this->setUpDisplayVariant();
        $this->blockRepository
            ->expects($this->once())
            ->method('getVisibleBlocksPerRegion')
            ->willReturn([]);
        $expected = [
            '#cache' => [
                'tags' => [
                    'config:block_list',
                ],
                'contexts' => [],
                'max-age' => -1,
            ],
            'content' => [
                'system_main' => [],
                'messages' => [
                    '#weight' => -1000,
                    '#type' => 'status_messages',
                    '#include_fallback' => TRUE,
                ],
            ],
        ];
        $this->assertSame($expected, $display_variant->build());
    }

}