class ViewsDataTest

class ViewsDataTest extends UnitTestCase {
    
    /**
     * The mocked cache backend.
     *
     * @var \Drupal\Core\Cache\CacheBackendInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $cacheBackend;
    
    /**
     * The mocked cache tags invalidator.
     *
     * @var \Drupal\Core\Cache\CacheTagsInvalidatorInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $cacheTagsInvalidator;
    
    /**
     * The mocked module handler.
     *
     * @var \Drupal\Core\Extension\ModuleHandlerInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $moduleHandler;
    
    /**
     * The mocked config factory.
     *
     * @var \Drupal\Core\Config\ConfigFactoryInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $configFactory;
    
    /**
     * The mocked language manager.
     *
     * @var \Drupal\Core\Language\LanguageManagerInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $languageManager;
    
    /**
     * The tested views data class.
     *
     * @var \Drupal\views\ViewsData
     */
    protected $viewsData;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->cacheTagsInvalidator = $this->createMock('Drupal\\Core\\Cache\\CacheTagsInvalidatorInterface');
        $this->cacheBackend = $this->createMock('Drupal\\Core\\Cache\\CacheBackendInterface');
        $this->getContainerWithCacheTagsInvalidator($this->cacheTagsInvalidator);
        $this->moduleHandler = $this->createMock('Drupal\\Core\\Extension\\ModuleHandlerInterface');
        $this->languageManager = $this->createMock('Drupal\\Core\\Language\\LanguageManagerInterface');
        $this->languageManager
            ->expects($this->any())
            ->method('getCurrentLanguage')
            ->willReturn(new Language([
            'id' => 'en',
        ]));
        $this->viewsData = new ViewsData($this->cacheBackend, $this->moduleHandler, $this->languageManager);
    }
    
    /**
     * Returns the views data definition.
     */
    protected function viewsData() {
        $data = ViewTestData::viewsData();
        // Tweak the views data to have a base for testing.
        unset($data['views_test_data']['id']['field']);
        unset($data['views_test_data']['name']['argument']);
        unset($data['views_test_data']['age']['filter']);
        unset($data['views_test_data']['job']['sort']);
        $data['views_test_data']['created']['area']['id'] = 'text';
        $data['views_test_data']['age']['area']['id'] = 'text';
        $data['views_test_data']['age']['area']['sub_type'] = 'header';
        $data['views_test_data']['job']['area']['id'] = 'text';
        $data['views_test_data']['job']['area']['sub_type'] = [
            'header',
            'footer',
        ];
        // Duplicate the example views test data for different weight, different
        // title and matching data.
        $data['views_test_data_2'] = $data['views_test_data'];
        $data['views_test_data_2']['table']['base']['weight'] = 50;
        $data['views_test_data_3'] = $data['views_test_data'];
        $data['views_test_data_3']['table']['base']['weight'] = -50;
        $data['views_test_data_4'] = $data['views_test_data'];
        $data['views_test_data_4']['table']['base']['title'] = 'A different title';
        $data['views_test_data_5'] = $data['views_test_data'];
        $data['views_test_data_5']['table']['base']['title'] = 'Z different title';
        $data['views_test_data_6'] = $data['views_test_data'];
        return $data;
    }
    
    /**
     * Returns the views data definition with the provider key.
     *
     * @return array
     *
     * @see static::viewsData()
     */
    protected function viewsDataWithProvider() {
        $views_data = static::viewsData();
        foreach (array_keys($views_data) as $table) {
            $views_data[$table]['table']['provider'] = 'views_test_data';
        }
        return $views_data;
    }
    
    /**
     * Mocks the basic module handler used for the test.
     */
    protected function setupMockedModuleHandler() : void {
        $this->moduleHandler
            ->expects($this->atLeastOnce())
            ->method('invokeAllWith')
            ->with('views_data')
            ->willReturnCallback(function (string $hook, callable $callback) {
            $callback(\Closure::fromCallable([
                $this,
                'viewsData',
            ]), 'views_test_data');
        });
    }
    
    /**
     * Tests the fetchBaseTables() method.
     */
    public function testFetchBaseTables() : void {
        $this->setupMockedModuleHandler();
        $data = $this->viewsData
            ->getAll();
        $base_tables = $this->viewsData
            ->fetchBaseTables();
        // Ensure that 'provider' is set for each base table.
        foreach (array_keys($base_tables) as $base_table) {
            $this->assertEquals('views_test_data', $data[$base_table]['table']['provider']);
        }
        // Test the number of tables returned and their order.
        $this->assertCount(6, $base_tables, 'The correct amount of base tables were returned.');
        $base_tables_keys = array_keys($base_tables);
        for ($i = 1; $i < count($base_tables); ++$i) {
            $prev = $base_tables[$base_tables_keys[$i - 1]];
            $current = $base_tables[$base_tables_keys[$i]];
            $this->assertGreaterThanOrEqual($prev['weight'], $current['weight']);
        }
        // Test the values returned for each base table.
        $defaults = [
            'title' => '',
            'help' => '',
            'weight' => 0,
        ];
        foreach ($base_tables as $base_table => $info) {
            // Merge in default values as in fetchBaseTables().
            $expected = $data[$base_table]['table']['base'] += $defaults;
            foreach ($defaults as $key => $default) {
                $this->assertSame($info[$key], $expected[$key]);
            }
        }
    }
    
    /**
     * Tests fetching all the views data without a static cache.
     */
    public function testGetOnFirstCall() : void {
        // Ensure that the hooks are just invoked once.
        $this->setupMockedModuleHandler();
        $this->moduleHandler
            ->expects($this->once())
            ->method('alter')
            ->with('views_data', $this->viewsDataWithProvider());
        $this->cacheBackend
            ->expects($this->once())
            ->method('get')
            ->with("views_data:en")
            ->willReturn(FALSE);
        $expected_views_data = $this->viewsDataWithProvider();
        $views_data = $this->viewsData
            ->getAll();
        $this->assertSame($expected_views_data, $views_data);
    }
    
    /**
     * Tests the cache of the full and single table data.
     */
    public function testFullAndTableGetCache() : void {
        $expected_views_data = $this->viewsDataWithProvider();
        $table_name = 'views_test_data';
        $table_name_2 = 'views_test_data_2';
        $random_table_name = $this->randomMachineName();
        // Views data should be invoked twice due to the clear call.
        $this->moduleHandler
            ->expects($this->exactly(2))
            ->method('invokeAllWith')
            ->with('views_data')
            ->willReturnCallback(function ($hook, $callback) {
            $callback(\Closure::fromCallable([
                $this,
                'viewsData',
            ]), 'views_test_data');
        });
        $this->moduleHandler
            ->expects($this->exactly(2))
            ->method('alter')
            ->with('views_data', $expected_views_data);
        // The cache should only be called once (before the clear() call) as get
        // will get all table data in the first get().
        $gets = [
            'views_data:en',
            "views_data:{$random_table_name}:en",
            'views_data:en',
            "views_data:{$random_table_name}:en",
        ];
        $this->cacheBackend
            ->expects($this->exactly(count($gets)))
            ->method('get')
            ->with($this->callback(function (string $key) use (&$gets) : bool {
            return $key === array_shift($gets);
        }))
            ->willReturn(FALSE);
        $sets = [
            'views_data:en',
            $expected_views_data,
            "views_data:{$random_table_name}:en",
            [],
            'views_data:en',
            $expected_views_data,
            "views_data:{$random_table_name}:en",
            [],
        ];
        $this->cacheBackend
            ->expects($this->exactly(count($sets) / 2))
            ->method('set')
            ->with($this->callback(function (string $key) use (&$sets) : bool {
            return $key === array_shift($sets);
        }), $this->callback(function (array $data) use (&$sets) : bool {
            return $data === array_shift($sets);
        }));
        $this->cacheTagsInvalidator
            ->expects($this->once())
            ->method('invalidateTags')
            ->with([
            'views_data',
        ]);
        $views_data = $this->viewsData
            ->getAll();
        $this->assertSame($expected_views_data, $views_data);
        // Request a specific table should be static cached.
        $views_data = $this->viewsData
            ->get($table_name);
        $this->assertSame($expected_views_data[$table_name], $views_data);
        // Another table being requested should also come from the static cache.
        $views_data = $this->viewsData
            ->get($table_name_2);
        $this->assertSame($expected_views_data[$table_name_2], $views_data);
        $views_data = $this->viewsData
            ->get($random_table_name);
        $this->assertSame([], $views_data);
        $this->viewsData
            ->clear();
        // Get the views data again.
        $this->viewsData
            ->getAll();
        $this->viewsData
            ->get($table_name);
        $this->viewsData
            ->get($table_name_2);
        $this->viewsData
            ->get($random_table_name);
    }
    
    /**
     * Tests the caching of the full views data.
     */
    public function testFullGetCache() : void {
        $expected_views_data = $this->viewsDataWithProvider();
        // Views data should be invoked once.
        $this->setupMockedModuleHandler();
        $this->moduleHandler
            ->expects($this->once())
            ->method('alter')
            ->with('views_data', $expected_views_data);
        $this->cacheBackend
            ->expects($this->once())
            ->method('get')
            ->with("views_data:en")
            ->willReturn(FALSE);
        $views_data = $this->viewsData
            ->getAll();
        $this->assertSame($expected_views_data, $views_data);
        $views_data = $this->viewsData
            ->getAll();
        $this->assertSame($expected_views_data, $views_data);
    }
    
    /**
     * Tests the caching of the views data for a specific table.
     */
    public function testSingleTableGetCache() : void {
        $table_name = 'views_test_data';
        $expected_views_data = $this->viewsDataWithProvider();
        // Views data should be invoked once.
        $this->setupMockedModuleHandler();
        $this->moduleHandler
            ->expects($this->once())
            ->method('alter')
            ->with('views_data', $this->viewsDataWithProvider());
        $gets = [
            "views_data:{$table_name}:en",
            'views_data:en',
        ];
        $this->cacheBackend
            ->expects($this->exactly(count($gets)))
            ->method('get')
            ->with($this->callback(function (string $key) use (&$gets) : bool {
            return $key === array_shift($gets);
        }))
            ->willReturn(FALSE);
        $views_data = $this->viewsData
            ->get($table_name);
        $this->assertSame($expected_views_data[$table_name], $views_data, 'Make sure fetching views data by table works as expected.');
        $views_data = $this->viewsData
            ->get($table_name);
        $this->assertSame($expected_views_data[$table_name], $views_data, 'Make sure fetching cached views data by table works as expected.');
        // Test that this data is present if all views data is returned.
        $views_data = $this->viewsData
            ->getAll();
        $this->assertArrayHasKey($table_name, $views_data, 'Make sure the views_test_data info appears in the total views data.');
        $this->assertSame($expected_views_data[$table_name], $views_data[$table_name], 'Make sure the views_test_data has the expected values.');
    }
    
    /**
     * Tests building the views data with a non existing table.
     */
    public function testNonExistingTableGetCache() : void {
        $random_table_name = $this->randomMachineName();
        // Views data should be invoked once.
        $this->setupMockedModuleHandler();
        $this->moduleHandler
            ->expects($this->once())
            ->method('alter')
            ->with('views_data', $this->viewsDataWithProvider());
        $gets = [
            "views_data:{$random_table_name}:en",
            'views_data:en',
        ];
        $this->cacheBackend
            ->expects($this->exactly(count($gets)))
            ->method('get')
            ->with($this->callback(function (string $key) use (&$gets) : bool {
            return $key === array_shift($gets);
        }))
            ->willReturn(FALSE);
        // All views data should be requested on the first try.
        $views_data = $this->viewsData
            ->get($random_table_name);
        $this->assertSame([], $views_data, 'Make sure fetching views data for an invalid table returns an empty array.');
        // Test no data is rebuilt when requesting an invalid table again.
        $views_data = $this->viewsData
            ->get($random_table_name);
        $this->assertSame([], $views_data, 'Make sure fetching views data for an invalid table returns an empty array.');
    }
    
    /**
     * Tests the cache backend behavior with requesting the same table multiple.
     */
    public function testCacheCallsWithSameTableMultipleTimes() : void {
        $expected_views_data = $this->viewsDataWithProvider();
        $this->setupMockedModuleHandler();
        $gets = [
            'views_data:views_test_data:en',
            'views_data:en',
        ];
        $this->cacheBackend
            ->expects($this->exactly(count($gets)))
            ->method('get')
            ->with($this->callback(function (string $key) use (&$gets) : bool {
            return $key === array_shift($gets);
        }));
        $sets = [
            'views_data:en',
            $expected_views_data,
            'views_data:views_test_data:en',
            $expected_views_data['views_test_data'],
        ];
        $this->cacheBackend
            ->expects($this->exactly(count($sets) / 2))
            ->method('set')
            ->with($this->callback(function (string $key) use (&$sets) : bool {
            return $key === array_shift($sets);
        }), $this->callback(function (array $data) use (&$sets) : bool {
            return $data === array_shift($sets);
        }));
        // Request the same table 5 times. The caches are empty at this point, so
        // what will happen is that it will first check for a cache entry for the
        // given table, get a cache miss, then try the cache entry for all tables,
        // which does not exist yet either. As a result, it rebuilds the information
        // and writes a cache entry for all tables and the requested table.
        $table_name = 'views_test_data';
        for ($i = 0; $i < 5; $i++) {
            $views_data = $this->viewsData
                ->get($table_name);
            $this->assertSame($expected_views_data['views_test_data'], $views_data);
        }
    }
    
    /**
     * Tests the cache calls for a single table and warm cache.
     *
     * Warm cache:
     *   - all tables
     *   - views_test_data
     */
    public function testCacheCallsWithSameTableMultipleTimesAndWarmCache() : void {
        $expected_views_data = $this->viewsDataWithProvider();
        $this->moduleHandler
            ->expects($this->never())
            ->method('invokeAllWith');
        // Setup a warm cache backend for a single table.
        $this->cacheBackend
            ->expects($this->once())
            ->method('get')
            ->with('views_data:views_test_data:en')
            ->willReturn((object) [
            'data' => $expected_views_data['views_test_data'],
        ]);
        $this->cacheBackend
            ->expects($this->never())
            ->method('set');
        // We have a warm cache now, so this will only request the tables-specific
        // cache entry and return that.
        for ($i = 0; $i < 5; $i++) {
            $views_data = $this->viewsData
                ->get('views_test_data');
            $this->assertSame($expected_views_data['views_test_data'], $views_data);
        }
    }
    
    /**
     * Tests the cache calls for a different table than the one in cache.
     *
     * Warm cache:
     *   - all tables
     *   - views_test_data
     * Not warm cache:
     *   - views_test_data_2
     */
    public function testCacheCallsWithWarmCacheAndDifferentTable() : void {
        $expected_views_data = $this->viewsDataWithProvider();
        $this->moduleHandler
            ->expects($this->never())
            ->method('invokeAllWith');
        // Setup a warm cache backend for a single table.
        $gets = [
            'views_data:views_test_data_2:en',
            'views_data:en',
        ];
        $this->cacheBackend
            ->expects($this->exactly(count($gets)))
            ->method('get')
            ->with($this->callback(function (string $key) use (&$gets) : bool {
            return $key === array_shift($gets);
        }))
            ->willReturnOnConsecutiveCalls(FALSE, (object) [
            'data' => $expected_views_data,
        ]);
        $this->cacheBackend
            ->expects($this->once())
            ->method('set')
            ->with('views_data:views_test_data_2:en', $expected_views_data['views_test_data_2']);
        // Requests a different table as the cache contains. This will fail to get a
        // table specific cache entry, load the cache entry for all tables and save
        // a cache entry for this table but not all.
        for ($i = 0; $i < 5; $i++) {
            $views_data = $this->viewsData
                ->get('views_test_data_2');
            $this->assertSame($expected_views_data['views_test_data_2'], $views_data);
        }
    }
    
    /**
     * Tests the cache calls for a non-existent table.
     *
     * Warm cache:
     *   - all tables
     *   - views_test_data
     * Not warm cache:
     *   - $non_existing_table
     */
    public function testCacheCallsWithWarmCacheAndInvalidTable() : void {
        $expected_views_data = $this->viewsDataWithProvider();
        $non_existing_table = $this->randomMachineName();
        $this->moduleHandler
            ->expects($this->never())
            ->method('invokeAllWith');
        // Setup a warm cache backend for a single table.
        $gets = [
            "views_data:{$non_existing_table}:en",
            'views_data:en',
        ];
        $this->cacheBackend
            ->expects($this->exactly(count($gets)))
            ->method('get')
            ->with($this->callback(function (string $key) use (&$gets) : bool {
            return $key === array_shift($gets);
        }))
            ->willReturnOnConsecutiveCalls(FALSE, (object) [
            'data' => $expected_views_data,
        ]);
        $this->cacheBackend
            ->expects($this->once())
            ->method('set')
            ->with("views_data:{$non_existing_table}:en", []);
        // Initialize the views data cache and request a non-existing table. This
        // will result in the same cache requests as we explicitly write an empty
        // cache entry for non-existing tables to avoid unnecessary requests in
        // those situations. We do have to load the cache entry for all tables to
        // check if the table does exist or not.
        for ($i = 0; $i < 5; $i++) {
            $views_data = $this->viewsData
                ->get($non_existing_table);
            $this->assertSame([], $views_data);
        }
    }
    
    /**
     * Tests the cache calls for a non-existent table.
     *
     * Warm cache:
     *   - all tables
     *   - views_test_data
     *   - $non_existing_table
     */
    public function testCacheCallsWithWarmCacheForInvalidTable() : void {
        $non_existing_table = $this->randomMachineName();
        $this->moduleHandler
            ->expects($this->never())
            ->method('invokeAllWith');
        // Setup a warm cache backend for a single table.
        $this->cacheBackend
            ->expects($this->once())
            ->method('get')
            ->with("views_data:{$non_existing_table}:en")
            ->willReturn((object) [
            'data' => [],
        ]);
        $this->cacheBackend
            ->expects($this->never())
            ->method('set');
        // Initialize the views data cache and request a non-existing table. This
        // will result in the same cache requests as we explicitly write an empty
        // cache entry for non-existing tables to avoid unnecessary requests in
        // those situations. We do have to load the cache entry for all tables to
        // check if the table does exist or not.
        for ($i = 0; $i < 5; $i++) {
            $views_data = $this->viewsData
                ->get($non_existing_table);
            $this->assertSame([], $views_data);
        }
    }
    
    /**
     * Tests the cache calls for all views data without a warm cache.
     */
    public function testCacheCallsWithoutWarmCacheAndGetAllTables() : void {
        $expected_views_data = $this->viewsDataWithProvider();
        $this->setupMockedModuleHandler();
        // Setup a warm cache backend for a single table.
        $this->cacheBackend
            ->expects($this->once())
            ->method('get')
            ->with("views_data:en");
        $this->cacheBackend
            ->expects($this->once())
            ->method('set')
            ->with('views_data:en', $expected_views_data);
        // Initialize the views data cache and repeat with no specified table. This
        // should only load the cache entry for all tables.
        for ($i = 0; $i < 5; $i++) {
            $views_data = $this->viewsData
                ->getAll();
            $this->assertSame($expected_views_data, $views_data);
        }
    }
    
    /**
     * Tests the cache calls for all views data.
     *
     * Warm cache:
     *   - all tables
     */
    public function testCacheCallsWithWarmCacheAndGetAllTables() : void {
        $expected_views_data = $this->viewsDataWithProvider();
        $this->moduleHandler
            ->expects($this->never())
            ->method('invokeAllWith');
        // Setup a warm cache backend for a single table.
        $this->cacheBackend
            ->expects($this->once())
            ->method('get')
            ->with("views_data:en")
            ->willReturn((object) [
            'data' => $expected_views_data,
        ]);
        $this->cacheBackend
            ->expects($this->never())
            ->method('set');
        // Initialize the views data cache and repeat with no specified table. This
        // should only load the cache entry for all tables.
        for ($i = 0; $i < 5; $i++) {
            $views_data = $this->viewsData
                ->getAll();
            $this->assertSame($expected_views_data, $views_data);
        }
    }
    
    /**
     * Tests the cache calls for multiple tables without warm caches.
     *
     * @covers ::get
     */
    public function testCacheCallsWithoutWarmCacheAndGetMultipleTables() : void {
        $expected_views_data = $this->viewsDataWithProvider();
        $table_name = 'views_test_data';
        $table_name_2 = 'views_test_data_2';
        // Setup a warm cache backend for all table data, but not single tables.
        $gets = [
            "views_data:{$table_name}:en",
            'views_data:en',
            "views_data:{$table_name_2}:en",
        ];
        $this->cacheBackend
            ->expects($this->exactly(count($gets)))
            ->method('get')
            ->with($this->callback(function (string $key) use (&$gets) : bool {
            return $key === array_shift($gets);
        }))
            ->willReturnOnConsecutiveCalls(FALSE, (object) [
            'data' => $expected_views_data,
        ], FALSE);
        $sets = [
            "views_data:{$table_name}:en",
            $expected_views_data[$table_name],
            "views_data:{$table_name_2}:en",
            $expected_views_data[$table_name_2],
        ];
        $this->cacheBackend
            ->expects($this->exactly(count($sets) / 2))
            ->method('set')
            ->with($this->callback(function (string $key) use (&$sets) : bool {
            return $key === array_shift($sets);
        }), $this->callback(function (array $data) use (&$sets) : bool {
            return $data === array_shift($sets);
        }));
        $this->assertSame($expected_views_data[$table_name], $this->viewsData
            ->get($table_name));
        $this->assertSame($expected_views_data[$table_name_2], $this->viewsData
            ->get($table_name_2));
        // Should only be invoked the first time.
        $this->assertSame($expected_views_data[$table_name], $this->viewsData
            ->get($table_name));
        $this->assertSame($expected_views_data[$table_name_2], $this->viewsData
            ->get($table_name_2));
    }
    
    /**
     * Tests that getting data with an empty key throws an exception.
     *
     * @covers ::get
     * @dataProvider providerTestGetEmptyKey
     */
    public function testGetEmptyKey($key) : void {
        $this->expectException(\InvalidArgumentException::class);
        $this->expectExceptionMessage('A valid cache entry key is required. Use getAll() to get all table data.');
        $this->viewsData
            ->get($key);
    }
    public static function providerTestGetEmptyKey() {
        return [
            [
                NULL,
            ],
            [
                '',
            ],
            [
                0,
            ],
        ];
    }

}