class BlockViewBuilderTest

Same name in other branches
  1. 9 core/modules/block/tests/src/Kernel/BlockViewBuilderTest.php \Drupal\Tests\block\Kernel\BlockViewBuilderTest
  2. 8.9.x core/modules/block/tests/src/Kernel/BlockViewBuilderTest.php \Drupal\Tests\block\Kernel\BlockViewBuilderTest
  3. 10 core/modules/block/tests/src/Kernel/BlockViewBuilderTest.php \Drupal\Tests\block\Kernel\BlockViewBuilderTest

Tests the block view builder.

@group block

Hierarchy

Expanded class hierarchy of BlockViewBuilderTest

File

core/modules/block/tests/src/Kernel/BlockViewBuilderTest.php, line 19

Namespace

Drupal\Tests\block\Kernel
View source
class BlockViewBuilderTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'block',
        'block_test',
        'system',
        'user',
    ];
    
    /**
     * The block being tested.
     *
     * @var \Drupal\block\BlockInterface
     */
    protected $block;
    
    /**
     * The block storage.
     *
     * @var \Drupal\Core\Config\Entity\ConfigEntityStorageInterface
     */
    protected $controller;
    
    /**
     * The renderer.
     *
     * @var \Drupal\Core\Render\RendererInterface
     */
    protected $renderer;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->container
            ->get('theme_installer')
            ->install([
            'stark',
        ]);
        $this->controller = $this->container
            ->get('entity_type.manager')
            ->getStorage('block');
        \Drupal::state()->set('block_test.content', 'Llamas > unicorns!');
        // Create a block with only required values.
        $this->block = $this->controller
            ->create([
            'id' => 'test_block',
            'theme' => 'stark',
            'plugin' => 'test_cache',
        ]);
        $this->block
            ->save();
        $this->container
            ->get('cache.render')
            ->deleteAll();
        $this->renderer = $this->container
            ->get('renderer');
    }
    
    /**
     * Tests the rendering of blocks.
     */
    public function testBasicRendering() : void {
        \Drupal::state()->set('block_test.content', '');
        $entity = $this->controller
            ->create([
            'id' => 'test_block1',
            'theme' => 'stark',
            'plugin' => 'test_html',
        ]);
        $entity->save();
        // Test the rendering of a block.
        $entity = Block::load('test_block1');
        $builder = \Drupal::entityTypeManager()->getViewBuilder('block');
        $output = $builder->view($entity, 'block');
        $expected = [];
        $expected[] = '<div id="block-test-block1">';
        $expected[] = '  ';
        $expected[] = '    ';
        $expected[] = '      ';
        $expected[] = '  </div>';
        $expected[] = '';
        $expected_output = implode("\n", $expected);
        $this->assertSame($expected_output, (string) $this->renderer
            ->renderRoot($output));
        // Reset the HTML IDs so that the next render is not affected.
        Html::resetSeenIds();
        // Test the rendering of a block with a given title.
        $entity = $this->controller
            ->create([
            'id' => 'test_block2',
            'theme' => 'stark',
            'plugin' => 'test_html',
            'settings' => [
                'label' => 'Powered by Bananas',
            ],
        ]);
        $entity->save();
        $output = $builder->view($entity, 'block');
        $expected = [];
        $expected[] = '<div id="block-test-block2">';
        $expected[] = '  ';
        $expected[] = '      <h2>Powered by Bananas</h2>';
        $expected[] = '    ';
        $expected[] = '      ';
        $expected[] = '  </div>';
        $expected[] = '';
        $expected_output = implode("\n", $expected);
        $this->assertSame($expected_output, (string) $this->renderer
            ->renderRoot($output));
    }
    
    /**
     * Tests block render cache handling.
     */
    public function testBlockViewBuilderCache() : void {
        // Verify cache handling for a non-empty block.
        $this->verifyRenderCacheHandling();
        // Create an empty block.
        $this->block = $this->controller
            ->create([
            'id' => 'test_block',
            'theme' => 'stark',
            'plugin' => 'test_cache',
        ]);
        $this->block
            ->save();
        \Drupal::state()->set('block_test.content', NULL);
        // Verify cache handling for an empty block.
        $this->verifyRenderCacheHandling();
    }
    
    /**
     * Verifies render cache handling of the block being tested.
     *
     * @see ::testBlockViewBuilderCache()
     */
    protected function verifyRenderCacheHandling() {
        
        /** @var \Drupal\Core\Cache\VariationCacheFactoryInterface $variation_cache_factory */
        $variation_cache_factory = $this->container
            ->get('variation_cache_factory');
        $cache_bin = $variation_cache_factory->get('render');
        // Force a request via GET so we can test the render cache.
        $request = \Drupal::request();
        $request_method = $request->server
            ->get('REQUEST_METHOD');
        $request->setMethod('GET');
        // Test that a cache entry is created.
        $build = $this->getBlockRenderArray();
        $cache_keys = [
            'entity_view',
            'block',
            'test_block',
        ];
        $this->renderer
            ->renderRoot($build);
        $this->assertNotEmpty($cache_bin->get($cache_keys, CacheableMetadata::createFromRenderArray($build)), 'The block render element has been cached.');
        // Re-save the block and check that the cache entry has been deleted.
        $this->block
            ->save();
        $this->assertFalse($cache_bin->get($cache_keys, CacheableMetadata::createFromRenderArray($build)), 'The block render cache entry has been cleared when the block was saved.');
        // Rebuild the render array (creating a new cache entry in the process) and
        // delete the block to check the cache entry is deleted.
        unset($build['#printed']);
        // Re-add the block because \Drupal\block\BlockViewBuilder::buildBlock()
        // removes it.
        $build['#block'] = $this->block;
        $this->renderer
            ->renderRoot($build);
        $this->assertNotEmpty($cache_bin->get($cache_keys, CacheableMetadata::createFromRenderArray($build)), 'The block render element has been cached.');
        $this->block
            ->delete();
        $this->assertFalse($cache_bin->get($cache_keys, CacheableMetadata::createFromRenderArray($build)), 'The block render cache entry has been cleared when the block was deleted.');
        // Restore the previous request method.
        $request->setMethod($request_method);
    }
    
    /**
     * Tests block view altering.
     *
     * @see hook_block_view_alter()
     * @see hook_block_view_BASE_BLOCK_ID_alter()
     */
    public function testBlockViewBuilderViewAlter() : void {
        // Establish baseline.
        $build = $this->getBlockRenderArray();
        $this->setRawContent((string) $this->renderer
            ->renderRoot($build));
        $this->assertSame('Llamas > unicorns!', trim((string) $this->cssSelect('div')[0]));
        // Enable the block view alter hook that adds a foo=bar attribute.
        \Drupal::state()->set('block_test_view_alter_suffix', TRUE);
        Cache::invalidateTags($this->block
            ->getCacheTagsToInvalidate());
        $build = $this->getBlockRenderArray();
        $this->setRawContent((string) $this->renderer
            ->renderRoot($build));
        $this->assertSame('Llamas > unicorns!', trim((string) $this->cssSelect('[foo=bar]')[0]));
        \Drupal::state()->set('block_test_view_alter_suffix', FALSE);
        \Drupal::state()->set('block_test.content', NULL);
        Cache::invalidateTags($this->block
            ->getCacheTagsToInvalidate());
        // Advanced: cached block, but an alter hook adds a #pre_render callback to
        // alter the eventual content.
        \Drupal::state()->set('block_test_view_alter_append_pre_render_prefix', TRUE);
        $build = $this->getBlockRenderArray();
        $this->assertFalse(isset($build['#prefix']), 'The appended #pre_render callback has not yet run before rendering.');
        $this->assertSame('Hiya!<br>', (string) $this->renderer
            ->renderRoot($build));
        // Check that a cached block without content is altered.
        $this->assertArrayHasKey('#prefix', $build);
        $this->assertSame('Hiya!<br>', $build['#prefix']);
    }
    
    /**
     * Tests block build altering.
     *
     * @see hook_block_build_alter()
     * @see hook_block_build_BASE_BLOCK_ID_alter()
     */
    public function testBlockViewBuilderBuildAlter() : void {
        // Force a request via GET so we can test the render cache.
        $request = \Drupal::request();
        $request_method = $request->server
            ->get('REQUEST_METHOD');
        $request->setMethod('GET');
        $default_keys = [
            'entity_view',
            'block',
            'test_block',
        ];
        $default_contexts = [];
        $default_tags = [
            'block_view',
            'config:block.block.test_block',
        ];
        $default_max_age = Cache::PERMANENT;
        // hook_block_build_alter() adds an additional cache key.
        $alter_add_key = $this->randomMachineName();
        \Drupal::state()->set('block_test_block_alter_cache_key', $alter_add_key);
        $this->assertBlockRenderedWithExpectedCacheability(array_merge($default_keys, [
            $alter_add_key,
        ]), $default_contexts, $default_tags, $default_max_age);
        \Drupal::state()->set('block_test_block_alter_cache_key', NULL);
        // hook_block_build_alter() adds an additional cache context.
        $alter_add_context = 'url.query_args:' . $this->randomMachineName();
        \Drupal::state()->set('block_test_block_alter_cache_context', $alter_add_context);
        $this->assertBlockRenderedWithExpectedCacheability($default_keys, Cache::mergeContexts($default_contexts, [
            $alter_add_context,
        ]), $default_tags, $default_max_age);
        \Drupal::state()->set('block_test_block_alter_cache_context', NULL);
        // hook_block_build_alter() adds an additional cache tag.
        $alter_add_tag = $this->randomMachineName();
        \Drupal::state()->set('block_test_block_alter_cache_tag', $alter_add_tag);
        $this->assertBlockRenderedWithExpectedCacheability($default_keys, $default_contexts, Cache::mergeTags($default_tags, [
            $alter_add_tag,
        ]), $default_max_age);
        \Drupal::state()->set('block_test_block_alter_cache_tag', NULL);
        // hook_block_build_alter() alters the max-age.
        $alter_max_age = 300;
        \Drupal::state()->set('block_test_block_alter_cache_max_age', $alter_max_age);
        $this->assertBlockRenderedWithExpectedCacheability($default_keys, $default_contexts, $default_tags, $alter_max_age);
        \Drupal::state()->set('block_test_block_alter_cache_max_age', NULL);
        // hook_block_build_alter() alters cache keys, contexts, tags and max-age.
        \Drupal::state()->set('block_test_block_alter_cache_key', $alter_add_key);
        \Drupal::state()->set('block_test_block_alter_cache_context', $alter_add_context);
        \Drupal::state()->set('block_test_block_alter_cache_tag', $alter_add_tag);
        \Drupal::state()->set('block_test_block_alter_cache_max_age', $alter_max_age);
        $this->assertBlockRenderedWithExpectedCacheability(array_merge($default_keys, [
            $alter_add_key,
        ]), Cache::mergeContexts($default_contexts, [
            $alter_add_context,
        ]), Cache::mergeTags($default_tags, [
            $alter_add_tag,
        ]), $alter_max_age);
        \Drupal::state()->set('block_test_block_alter_cache_key', NULL);
        \Drupal::state()->set('block_test_block_alter_cache_context', NULL);
        \Drupal::state()->set('block_test_block_alter_cache_tag', NULL);
        \Drupal::state()->set('block_test_block_alter_cache_max_age', NULL);
        // hook_block_build_alter() sets #create_placeholder.
        foreach ([
            TRUE,
            FALSE,
        ] as $value) {
            \Drupal::state()->set('block_test_block_alter_create_placeholder', $value);
            $build = $this->getBlockRenderArray();
            $this->assertTrue(isset($build['#create_placeholder']));
            $this->assertSame($value, $build['#create_placeholder']);
        }
        \Drupal::state()->set('block_test_block_alter_create_placeholder', NULL);
        // Restore the previous request method.
        $request->setMethod($request_method);
    }
    
    /**
     * Asserts that a block is built/rendered/cached with expected cacheability.
     *
     * @param string[] $expected_keys
     *   The expected cache keys.
     * @param string[] $expected_contexts
     *   The expected cache contexts.
     * @param string[] $expected_tags
     *   The expected cache tags.
     * @param int $expected_max_age
     *   The expected max-age.
     *
     * @internal
     */
    protected function assertBlockRenderedWithExpectedCacheability(array $expected_keys, array $expected_contexts, array $expected_tags, int $expected_max_age) : void {
        
        /** @var \Drupal\Core\Cache\VariationCacheFactoryInterface $variation_cache_factory */
        $variation_cache_factory = $this->container
            ->get('variation_cache_factory');
        $cache_bin = $variation_cache_factory->get('render');
        $required_cache_contexts = [
            'languages:' . LanguageInterface::TYPE_INTERFACE,
            'theme',
            'user.permissions',
        ];
        // Check that the expected cacheability metadata is present in:
        // - the built render array;
        $build = $this->getBlockRenderArray();
        $this->assertSame($expected_keys, $build['#cache']['keys']);
        $this->assertEqualsCanonicalizing($expected_contexts, $build['#cache']['contexts']);
        $this->assertEqualsCanonicalizing($expected_tags, $build['#cache']['tags']);
        $this->assertSame($expected_max_age, $build['#cache']['max-age']);
        $this->assertFalse(isset($build['#create_placeholder']));
        // - the rendered render array;
        $this->renderer
            ->renderRoot($build);
        // - the render cache item.
        $final_cache_contexts = Cache::mergeContexts($expected_contexts, $required_cache_contexts);
        $cache_item = $cache_bin->get($expected_keys, CacheableMetadata::createFromRenderArray($build));
        $this->assertNotEmpty($cache_item, 'The block render element has been cached with the expected cache keys.');
        $this->assertEqualsCanonicalizing(Cache::mergeTags($expected_tags, [
            'rendered',
        ]), $cache_item->tags);
        $this->assertEqualsCanonicalizing($final_cache_contexts, $cache_item->data['#cache']['contexts']);
        $this->assertEqualsCanonicalizing($expected_tags, $cache_item->data['#cache']['tags']);
        $this->assertSame($expected_max_age, $cache_item->data['#cache']['max-age']);
        $cache_bin->delete($expected_keys, CacheableMetadata::createFromRenderArray($build));
    }
    
    /**
     * Get a fully built render array for a block.
     *
     * @return array
     *   The render array.
     */
    protected function getBlockRenderArray() {
        return $this->container
            ->get('entity_type.manager')
            ->getViewBuilder('block')
            ->view($this->block, 'block');
    }

}

Members

Title Sort descending Modifiers Object type Summary Overriden Title Overrides
AssertContentTrait::$content protected property The current raw content.
AssertContentTrait::$drupalSettings protected property The drupalSettings value from the current raw $content.
AssertContentTrait::$elements protected property The XML structure parsed from the current raw $content. 1
AssertContentTrait::$plainTextContent protected property The plain-text content of raw $content (text nodes).
AssertContentTrait::assertEscaped protected function Passes if the raw text IS found escaped on the loaded page, fail otherwise.
AssertContentTrait::assertField protected function Asserts that a field exists with the given name or ID.
AssertContentTrait::assertFieldById protected function Asserts that a field exists with the given ID and value.
AssertContentTrait::assertFieldByName protected function Asserts that a field exists with the given name and value.
AssertContentTrait::assertFieldByXPath protected function Asserts that a field exists in the current page by the given XPath.
AssertContentTrait::assertFieldChecked protected function Asserts that a checkbox field in the current page is checked.
AssertContentTrait::assertFieldsByValue protected function Asserts that a field exists in the current page with a given Xpath result.
AssertContentTrait::assertLink protected function Passes if a link with the specified label is found.
AssertContentTrait::assertLinkByHref protected function Passes if a link containing a given href (part) is found.
AssertContentTrait::assertNoDuplicateIds protected function Asserts that each HTML ID is used for just a single element.
AssertContentTrait::assertNoEscaped protected function Passes if raw text IS NOT found escaped on loaded page, fail otherwise.
AssertContentTrait::assertNoField protected function Asserts that a field does not exist with the given name or ID.
AssertContentTrait::assertNoFieldById protected function Asserts that a field does not exist with the given ID and value.
AssertContentTrait::assertNoFieldByName protected function Asserts that a field does not exist with the given name and value.
AssertContentTrait::assertNoFieldByXPath protected function Asserts that a field does not exist or its value does not match, by XPath.
AssertContentTrait::assertNoFieldChecked protected function Asserts that a checkbox field in the current page is not checked.
AssertContentTrait::assertNoLink protected function Passes if a link with the specified label is not found.
AssertContentTrait::assertNoLinkByHref protected function Passes if a link containing a given href (part) is not found.
AssertContentTrait::assertNoLinkByHrefInMainRegion protected function Passes if a link containing a given href is not found in the main region.
AssertContentTrait::assertNoOption protected function Asserts that a select option in the current page does not exist.
AssertContentTrait::assertNoOptionSelected protected function Asserts that a select option in the current page is not checked.
AssertContentTrait::assertNoPattern protected function Triggers a pass if the perl regex pattern is not found in raw content.
AssertContentTrait::assertNoRaw protected function Passes if the raw text is NOT found on the loaded page, fail otherwise.
AssertContentTrait::assertNoText protected function Passes if the page (with HTML stripped) does not contains the text.
AssertContentTrait::assertNoTitle protected function Pass if the page title is not the given string.
AssertContentTrait::assertNoUniqueText protected function Passes if the text is found MORE THAN ONCE on the text version of the page.
AssertContentTrait::assertOption protected function Asserts that a select option in the current page exists.
AssertContentTrait::assertOptionByText protected function Asserts that a select option with the visible text exists.
AssertContentTrait::assertOptionSelected protected function Asserts that a select option in the current page is checked.
AssertContentTrait::assertOptionSelectedWithDrupalSelector protected function Asserts that a select option in the current page is checked.
AssertContentTrait::assertOptionWithDrupalSelector protected function Asserts that a select option in the current page exists.
AssertContentTrait::assertPattern protected function Triggers a pass if the Perl regex pattern is found in the raw content.
AssertContentTrait::assertRaw protected function Passes if the raw text IS found on the loaded page, fail otherwise.
AssertContentTrait::assertText protected function Passes if the page (with HTML stripped) contains the text.
AssertContentTrait::assertTextHelper protected function Helper for assertText and assertNoText.
AssertContentTrait::assertTextPattern protected function Asserts that a Perl regex pattern is found in the plain-text content.
AssertContentTrait::assertThemeOutput protected function Asserts themed output.
AssertContentTrait::assertTitle protected function Pass if the page title is the given string.
AssertContentTrait::assertUniqueText protected function Passes if the text is found ONLY ONCE on the text version of the page.
AssertContentTrait::assertUniqueTextHelper protected function Helper for assertUniqueText and assertNoUniqueText.
AssertContentTrait::buildXPathQuery protected function Builds an XPath query.
AssertContentTrait::constructFieldXpath protected function Helper: Constructs an XPath for the given set of attributes and value.
AssertContentTrait::cssSelect protected function Searches elements using a CSS selector in the raw content.
AssertContentTrait::getAllOptions protected function Get all option elements, including nested options, in a select.
AssertContentTrait::getDrupalSettings protected function Gets the value of drupalSettings for the currently-loaded page.
AssertContentTrait::getRawContent protected function Gets the current raw content.
AssertContentTrait::getSelectedItem protected function Get the selected value from a select field.
AssertContentTrait::getTextContent protected function Retrieves the plain-text content from the current raw content.
AssertContentTrait::parse protected function Parse content returned from curlExec using DOM and SimpleXML.
AssertContentTrait::removeWhiteSpace protected function Removes all white-space between HTML tags from the raw content.
AssertContentTrait::setDrupalSettings protected function Sets the value of drupalSettings for the currently-loaded page.
AssertContentTrait::setRawContent protected function Sets the raw content (e.g. HTML).
AssertContentTrait::xpath protected function Performs an xpath search on the contents of the internal browser.
BlockViewBuilderTest::$block protected property The block being tested.
BlockViewBuilderTest::$controller protected property The block storage.
BlockViewBuilderTest::$modules protected static property Modules to install. Overrides KernelTestBase::$modules
BlockViewBuilderTest::$renderer protected property The renderer.
BlockViewBuilderTest::assertBlockRenderedWithExpectedCacheability protected function Asserts that a block is built/rendered/cached with expected cacheability.
BlockViewBuilderTest::getBlockRenderArray protected function Get a fully built render array for a block.
BlockViewBuilderTest::setUp protected function Overrides KernelTestBase::setUp
BlockViewBuilderTest::testBasicRendering public function Tests the rendering of blocks.
BlockViewBuilderTest::testBlockViewBuilderBuildAlter public function Tests block build altering.
BlockViewBuilderTest::testBlockViewBuilderCache public function Tests block render cache handling.
BlockViewBuilderTest::testBlockViewBuilderViewAlter public function Tests block view altering.
BlockViewBuilderTest::verifyRenderCacheHandling protected function Verifies render cache handling of the block being tested.
ConfigTestTrait::configImporter protected function Returns a ConfigImporter object to import test configuration.
ConfigTestTrait::copyConfig protected function Copies configuration objects from source storage to target storage.
ExpectDeprecationTrait::expectDeprecation public function Adds an expected deprecation.
ExpectDeprecationTrait::getCallableName private static function Returns a callable as a string suitable for inclusion in a message.
ExpectDeprecationTrait::setUpErrorHandler public function Sets up the test error handler.
ExpectDeprecationTrait::tearDownErrorHandler public function Tears down the test error handler.
ExtensionListTestTrait::getModulePath protected function Gets the path for the specified module.
ExtensionListTestTrait::getThemePath protected function Gets the path for the specified theme.
KernelTestBase::$backupStaticAttributes protected property Back up and restore static class properties that may be changed by tests.
KernelTestBase::$backupStaticAttributesBlacklist protected property Contains a few static class properties for performance.
KernelTestBase::$classLoader protected property
KernelTestBase::$configImporter protected property @todo Move into Config test base class. 6
KernelTestBase::$configSchemaCheckerExclusions protected static property An array of config object names that are excluded from schema checking. 4
KernelTestBase::$container protected property
KernelTestBase::$databasePrefix protected property
KernelTestBase::$keyValue protected property The key_value service that must persist between container rebuilds.
KernelTestBase::$root protected property The app root.
KernelTestBase::$siteDirectory protected property
KernelTestBase::$strictConfigSchema protected property Set to TRUE to strict check all configuration saved. 9
KernelTestBase::$usesSuperUserAccessPolicy protected property Set to TRUE to make user 1 a super user. 3
KernelTestBase::$vfsRoot protected property The virtual filesystem root directory.
KernelTestBase::assertPostConditions protected function 1
KernelTestBase::bootEnvironment protected function Bootstraps a basic test environment.
KernelTestBase::bootKernel protected function Bootstraps a kernel for a test. 1
KernelTestBase::config protected function Configuration accessor for tests. Returns non-overridden configuration.
KernelTestBase::disableModules protected function Disables modules for this test.
KernelTestBase::enableModules protected function Enables modules for this test. 1
KernelTestBase::getConfigSchemaExclusions protected function Gets the config schema exclusions for this test.
KernelTestBase::getDatabaseConnectionInfo protected function Returns the Database connection info to be used for this test. 2
KernelTestBase::getDatabasePrefix public function
KernelTestBase::getExtensionsForModules private function Returns Extension objects for $modules to install.
KernelTestBase::getModulesToEnable private static function Returns the modules to install for this test.
KernelTestBase::initFileCache protected function Initializes the FileCache component.
KernelTestBase::installConfig protected function Installs default configuration for a given list of modules.
KernelTestBase::installEntitySchema protected function Installs the storage schema for a specific entity type.
KernelTestBase::installSchema protected function Installs database tables from a module schema definition.
KernelTestBase::register public function Registers test-specific services. Overrides ServiceProviderInterface::register 27
KernelTestBase::render protected function Renders a render array. 1
KernelTestBase::setInstallProfile protected function Sets the install profile and rebuilds the container to update it.
KernelTestBase::setSetting protected function Sets an in-memory Settings variable.
KernelTestBase::setUpBeforeClass public static function 1
KernelTestBase::setUpFilesystem protected function Sets up the filesystem, so things like the file directory. 2
KernelTestBase::tearDown protected function 7
KernelTestBase::tearDownCloseDatabaseConnection public function Additional tear down method to close the connection at the end.
KernelTestBase::vfsDump protected function Dumps the current state of the virtual filesystem to STDOUT.
KernelTestBase::__construct public function
KernelTestBase::__sleep public function Prevents serializing any properties.
RandomGeneratorTrait::getRandomGenerator protected function Gets the random generator for the utility methods.
RandomGeneratorTrait::randomMachineName protected function Generates a unique random string containing letters and numbers.
RandomGeneratorTrait::randomObject public function Generates a random PHP object.
RandomGeneratorTrait::randomString public function Generates a pseudo-random string of ASCII characters of codes 32 to 126.
StorageCopyTrait::replaceStorageContents protected static function Copy the configuration from one storage to another and remove stale items.
TestRequirementsTrait::getDrupalRoot protected static function Returns the Drupal root directory.

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