class ConnectionTest in Drupal 9

Same name in this branch

9 core/tests/Drupal/Tests/Core/Database/ConnectionTest.php \Drupal\Tests\Core\Database\ConnectionTest
9 core/tests/Drupal/KernelTests/Core/Database/ConnectionTest.php \Drupal\KernelTests\Core\Database\ConnectionTest
9 core/tests/Drupal/Tests/Core/Database/Driver/sqlite/ConnectionTest.php \Drupal\Tests\Core\Database\Driver\sqlite\ConnectionTest
9 core/tests/Drupal/Tests/Core/Database/Driver/mysql/ConnectionTest.php \Drupal\Tests\Core\Database\Driver\mysql\ConnectionTest

Same name and namespace in other branches

8 core/tests/Drupal/KernelTests/Core/Database/ConnectionTest.php \Drupal\KernelTests\Core\Database\ConnectionTest

Tests of the core database system.

@group Database

Hierarchy

class \Drupal\KernelTests\KernelTestBase extends \PHPUnit\Framework\TestCase implements ServiceProviderInterface uses \Symfony\Bridge\PhpUnit\ExpectDeprecationTrait, AssertContentTrait, AssertLegacyTrait, ConfigTestTrait, ExtensionListTestTrait, PhpUnitCompatibilityTrait, RandomGeneratorTrait, TestRequirementsTrait, PhpUnitWarnings
- class \Drupal\KernelTests\Core\Database\DatabaseTestBase
  - class \Drupal\KernelTests\Core\Database\ConnectionTest

Expanded class hierarchy of ConnectionTest

File

core/tests/Drupal/KernelTests/Core/Database/ConnectionTest.php, line 16

Namespace

Drupal\KernelTests\Core\Database

View source

class ConnectionTest extends DatabaseTestBase {

  /**
   * Tests that connections return appropriate connection objects.
   */
  public function testConnectionRouting() {

    // Clone the primary credentials to a replica connection.
    // Note this will result in two independent connection objects that happen
    // to point to the same place.
    $connection_info = Database::getConnectionInfo('default');
    Database::addConnectionInfo('default', 'replica', $connection_info['default']);
    $db1 = Database::getConnection('default', 'default');
    $db2 = Database::getConnection('replica', 'default');
    $this
      ->assertNotNull($db1, 'default connection is a real connection object.');
    $this
      ->assertNotNull($db2, 'replica connection is a real connection object.');
    $this
      ->assertNotSame($db1, $db2, 'Each target refers to a different connection.');

    // Try to open those targets another time, that should return the same objects.
    $db1b = Database::getConnection('default', 'default');
    $db2b = Database::getConnection('replica', 'default');
    $this
      ->assertSame($db1, $db1b, 'A second call to getConnection() returns the same object.');
    $this
      ->assertSame($db2, $db2b, 'A second call to getConnection() returns the same object.');

    // Try to open an unknown target.
    $unknown_target = $this
      ->randomMachineName();
    $db3 = Database::getConnection($unknown_target, 'default');
    $this
      ->assertNotNull($db3, 'Opening an unknown target returns a real connection object.');
    $this
      ->assertSame($db1, $db3, 'An unknown target opens the default connection.');

    // Try to open that unknown target another time, that should return the same object.
    $db3b = Database::getConnection($unknown_target, 'default');
    $this
      ->assertSame($db3, $db3b, 'A second call to getConnection() returns the same object.');
  }

  /**
   * Tests that connections return appropriate connection objects.
   */
  public function testConnectionRoutingOverride() {

    // Clone the primary credentials to a replica connection.
    // Note this will result in two independent connection objects that happen
    // to point to the same place.
    $connection_info = Database::getConnectionInfo('default');
    Database::addConnectionInfo('default', 'replica', $connection_info['default']);
    Database::ignoreTarget('default', 'replica');
    $db1 = Database::getConnection('default', 'default');
    $db2 = Database::getConnection('replica', 'default');
    $this
      ->assertSame($db1, $db2, 'Both targets refer to the same connection.');
  }

  /**
   * Tests the closing of a database connection.
   */
  public function testConnectionClosing() {

    // Open the default target so we have an object to compare.
    $db1 = Database::getConnection('default', 'default');

    // Try to close the default connection, then open a new one.
    Database::closeConnection('default', 'default');
    $db2 = Database::getConnection('default', 'default');

    // Opening a connection after closing it should yield an object different than the original.
    $this
      ->assertNotSame($db1, $db2, 'Opening the default connection after it is closed returns a new object.');
  }

  /**
   * Tests the connection options of the active database.
   */
  public function testConnectionOptions() {
    $connection_info = Database::getConnectionInfo('default');

    // Be sure we're connected to the default database.
    $db = Database::getConnection('default', 'default');
    $connectionOptions = $db
      ->getConnectionOptions();

    // In the MySQL driver, the port can be different, so check individual
    // options.
    $this
      ->assertEquals($connection_info['default']['driver'], $connectionOptions['driver'], 'The default connection info driver matches the current connection options driver.');
    $this
      ->assertEquals($connection_info['default']['database'], $connectionOptions['database'], 'The default connection info database matches the current connection options database.');

    // Set up identical replica and confirm connection options are identical.
    Database::addConnectionInfo('default', 'replica', $connection_info['default']);
    $db2 = Database::getConnection('replica', 'default');

    // Getting a driver class ensures the namespace option is set.
    $this
      ->assertEquals($db
      ->getDriverClass('Select'), $db2
      ->getDriverClass('Select'));
    $connectionOptions2 = $db2
      ->getConnectionOptions();

    // Get a fresh copy of the default connection options.
    $connectionOptions = $db
      ->getConnectionOptions();
    $this
      ->assertSame($connectionOptions2, $connectionOptions, 'The default and replica connection options are identical.');

    // Set up a new connection with different connection info.
    $test = $connection_info['default'];
    $test['database'] .= 'test';
    Database::addConnectionInfo('test', 'default', $test);
    $connection_info = Database::getConnectionInfo('test');

    // Get a fresh copy of the default connection options.
    $connectionOptions = $db
      ->getConnectionOptions();
    $this
      ->assertNotEquals($connection_info['default']['database'], $connectionOptions['database'], 'The test connection info database does not match the current connection options database.');
  }

  /**
   * Tests the deprecation of the 'transactions' connection option.
   *
   * @group legacy
   */
  public function testTransactionsOptionDeprecation() {
    $this
      ->expectDeprecation('Passing a \'transactions\' connection option to Drupal\\Core\\Database\\Connection::__construct is deprecated in drupal:9.1.0 and is removed in drupal:10.0.0. All database drivers must support transactions. See https://www.drupal.org/node/2278745');
    $this
      ->expectDeprecation('Drupal\\Core\\Database\\Connection::supportsTransactions is deprecated in drupal:9.1.0 and is removed in drupal:10.0.0. All database drivers must support transactions. See https://www.drupal.org/node/2278745');
    $connection_info = Database::getConnectionInfo('default');
    $connection_info['default']['transactions'] = FALSE;
    Database::addConnectionInfo('default', 'foo', $connection_info['default']);
    $foo_connection = Database::getConnection('foo', 'default');
    $this
      ->assertInstanceOf(Connection::class, $foo_connection);
    $this
      ->assertTrue($foo_connection
      ->supportsTransactions());
  }

  /**
   * Tests the deprecation of passing a statement object to ::query.
   *
   * @group legacy
   */
  public function testStatementQueryDeprecation() : void {
    $this
      ->expectDeprecation('Passing a StatementInterface object as a $query argument to Drupal\\Core\\Database\\Connection::query is deprecated in drupal:9.2.0 and is removed in drupal:10.0.0. Call the execute method from the StatementInterface object directly instead. See https://www.drupal.org/node/3154439');
    $db = Database::getConnection();
    $stmt = $db
      ->prepareStatement('SELECT * FROM {test}', []);
    $this
      ->assertNotNull($db
      ->query($stmt));
  }

  /**
   * Tests the deprecation of passing a PDOStatement object to ::query.
   *
   * @group legacy
   */
  public function testPDOStatementQueryDeprecation() : void {
    $db = Database::getConnection();
    $stmt = $db
      ->prepareStatement('SELECT * FROM {test}', []);
    if (!$stmt instanceof StatementWrapper) {
      $this
        ->markTestSkipped("This test only runs for db drivers using StatementWrapper.");
    }
    if (!$stmt
      ->getClientStatement() instanceof \PDOStatement) {
      $this
        ->markTestSkipped("This test only runs for PDO-based db drivers.");
    }
    $this
      ->expectDeprecation('Passing a \\PDOStatement object as a $query argument to Drupal\\Core\\Database\\Connection::query is deprecated in drupal:9.2.0 and is removed in drupal:10.0.0. Call the execute method from the StatementInterface object directly instead. See https://www.drupal.org/node/3154439');
    $this
      ->assertNotNull($db
      ->query($stmt
      ->getClientStatement()));
  }

  /**
   * Tests per-table prefix connection option.
   */
  public function testPerTablePrefixOption() {
    $connection_info = Database::getConnectionInfo('default');
    $new_connection_info = $connection_info['default'];
    $new_connection_info['prefix'] = [
      'default' => $connection_info['default']['prefix'],
      'test_table' => $connection_info['default']['prefix'] . '_bar',
    ];
    Database::addConnectionInfo('default', 'foo', $new_connection_info);
    $foo_connection = Database::getConnection('foo', 'default');
    $this
      ->assertInstanceOf(Connection::class, $foo_connection);
    $this
      ->assertIsString($foo_connection
      ->getConnectionOptions()['prefix']);
    $this
      ->assertSame($connection_info['default']['prefix'], $foo_connection
      ->getConnectionOptions()['prefix']);
    $this
      ->assertSame([
      'test_table' => $connection_info['default']['prefix'] . '_bar',
    ], $foo_connection
      ->getConnectionOptions()['extra_prefix']);
  }

  /**
   * Tests the prefix connection option in array form.
   */
  public function testPrefixArrayOption() {
    $connection_info = Database::getConnectionInfo('default');
    $new_connection_info = $connection_info['default'];
    $new_connection_info['prefix'] = [
      'default' => $connection_info['default']['prefix'],
    ];
    Database::addConnectionInfo('default', 'foo', $new_connection_info);
    $foo_connection = Database::getConnection('foo', 'default');
    $this
      ->assertInstanceOf(Connection::class, $foo_connection);
    $this
      ->assertIsString($foo_connection
      ->getConnectionOptions()['prefix']);
    $this
      ->assertSame($connection_info['default']['prefix'], $foo_connection
      ->getConnectionOptions()['prefix']);
    $this
      ->assertArrayNotHasKey('extra_prefix', $foo_connection
      ->getConnectionOptions());
  }

  /**
   * Ensure that you cannot execute multiple statements on MySQL.
   */
  public function testMultipleStatementsForNewPhp() {

    // This just tests mysql, as other PDO integrations don't allow disabling
    // multiple statements.
    if (Database::getConnection()
      ->databaseType() !== 'mysql') {
      $this
        ->markTestSkipped("This test only runs for MySQL");
    }

    // Disable the protection at the PHP level.
    $this
      ->expectException(DatabaseExceptionWrapper::class);
    Database::getConnection('default', 'default')
      ->query('SELECT * FROM {test}; SELECT * FROM {test_people}', [], [
      'allow_delimiter_in_query' => TRUE,
    ]);
  }

  /**
   * Ensure that you cannot execute multiple statements in a query.
   */
  public function testMultipleStatementsQuery() {
    $this
      ->expectException(\InvalidArgumentException::class);
    Database::getConnection('default', 'default')
      ->query('SELECT * FROM {test}; SELECT * FROM {test_people}');
  }

  /**
   * Ensure that you cannot prepare multiple statements.
   */
  public function testMultipleStatements() {
    $this
      ->expectException(\InvalidArgumentException::class);
    Database::getConnection('default', 'default')
      ->prepareStatement('SELECT * FROM {test}; SELECT * FROM {test_people}', []);
  }

  /**
   * Tests that the method ::condition() returns a Condition object.
   */
  public function testCondition() {
    $connection = Database::getConnection('default', 'default');
    $namespace = (new \ReflectionObject($connection))
      ->getNamespaceName() . "\\Condition";
    if (!class_exists($namespace)) {
      $namespace = Condition::class;
    }
    $condition = $connection
      ->condition('AND');
    $this
      ->assertSame($namespace, get_class($condition));
  }

}

Members

Name	Modifiers	Type	Description	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 the raw text IS NOT found escaped on the 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::getUrl	protected	function	Get the current URL from the cURL handler.	1
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.
AssertLegacyTrait::assert Deprecated	protected	function
AssertLegacyTrait::assertEqual Deprecated	protected	function
AssertLegacyTrait::assertIdentical Deprecated	protected	function
AssertLegacyTrait::assertIdenticalObject Deprecated	protected	function
AssertLegacyTrait::assertNotEqual Deprecated	protected	function
AssertLegacyTrait::assertNotIdentical Deprecated	protected	function
AssertLegacyTrait::pass Deprecated	protected	function
AssertLegacyTrait::verbose Deprecated	protected	function
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.
ConnectionTest::testCondition	public	function	Tests that the method ::condition() returns a Condition object.
ConnectionTest::testConnectionClosing	public	function	Tests the closing of a database connection.
ConnectionTest::testConnectionOptions	public	function	Tests the connection options of the active database.
ConnectionTest::testConnectionRouting	public	function	Tests that connections return appropriate connection objects.
ConnectionTest::testConnectionRoutingOverride	public	function	Tests that connections return appropriate connection objects.
ConnectionTest::testMultipleStatements	public	function	Ensure that you cannot prepare multiple statements.
ConnectionTest::testMultipleStatementsForNewPhp	public	function	Ensure that you cannot execute multiple statements on MySQL.
ConnectionTest::testMultipleStatementsQuery	public	function	Ensure that you cannot execute multiple statements in a query.
ConnectionTest::testPDOStatementQueryDeprecation	public	function	Tests the deprecation of passing a PDOStatement object to ::query.
ConnectionTest::testPerTablePrefixOption	public	function	Tests per-table prefix connection option.
ConnectionTest::testPrefixArrayOption	public	function	Tests the prefix connection option in array form.
ConnectionTest::testStatementQueryDeprecation	public	function	Tests the deprecation of passing a statement object to ::query.
ConnectionTest::testTransactionsOptionDeprecation	public	function	Tests the deprecation of the 'transactions' connection option.
DatabaseTestBase::$connection	protected	property	The database connection for testing.
DatabaseTestBase::$modules	protected static	property	Modules to enable. Overrides KernelTestBase::$modules	4
DatabaseTestBase::addSampleData	public static	function	Sets up our sample data.
DatabaseTestBase::ensureSampleDataNull	public	function	Sets up tables for NULL handling.
DatabaseTestBase::setUp	protected	function	Overrides KernelTestBase::setUp	3
ExtensionListTestTrait::getModulePath	protected	function	Gets the path for the specified module.
ExtensionListTestTrait::getThemePath	protected	function	Gets the path for the specified theme.
KernelTestBase::$backupGlobals	protected	property	Back up and restore any global variables that may be changed by tests.
KernelTestBase::$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::$configImporter	protected	property	@todo Move into Config test base class.	7
KernelTestBase::$configSchemaCheckerExclusions	protected static	property	An array of config object names that are excluded from schema checking.
KernelTestBase::$container	protected	property
KernelTestBase::$databasePrefix	protected	property
KernelTestBase::$preserveGlobalState	protected	property	Do not forward any global state from the parent process to the processes that run the actual tests.
KernelTestBase::$root	protected	property	The app root.
KernelTestBase::$runTestInSeparateProcess	protected	property	Kernel tests are run in separate processes because they allow autoloading of code from extensions. Running the test in a separate process isolates this behavior from other tests. Subclasses should not override this property.
KernelTestBase::$siteDirectory	protected	property
KernelTestBase::$strictConfigSchema	protected	property	Set to TRUE to strict check all configuration saved.	6
KernelTestBase::$vfsRoot	protected	property	The virtual filesystem root directory.
KernelTestBase::assertPostConditions	protected	function		1
KernelTestBase::bootEnvironment	protected	function	Bootstraps a basic test environment.
KernelTestBase::bootKernel	private	function	Bootstraps a kernel for a test.
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.
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.	3
KernelTestBase::getDatabasePrefix	public	function
KernelTestBase::getExtensionsForModules	private	function	Returns Extension objects for $modules to enable.
KernelTestBase::getModulesToEnable	private static	function	Returns the modules to enable for this test.
KernelTestBase::initFileCache	protected	function	Initializes the FileCache component.
KernelTestBase::installConfig	protected	function	Installs default configuration for a given list of modules.
KernelTestBase::installEntitySchema	protected	function	Installs the storage schema for a specific entity type.
KernelTestBase::installSchema	protected	function	Installs database tables from a module schema definition.
KernelTestBase::prepareTemplate	protected	function
KernelTestBase::register	public	function	Registers test-specific services. Overrides ServiceProviderInterface::register	24
KernelTestBase::render	protected	function	Renders a render array.	1
KernelTestBase::setInstallProfile	protected	function	Sets the install profile and rebuilds the container to update it.
KernelTestBase::setSetting	protected	function	Sets an in-memory Settings variable.
KernelTestBase::setUpBeforeClass	public static	function		1
KernelTestBase::setUpFilesystem	protected	function	Sets up the filesystem, so things like the file directory.	2
KernelTestBase::stop	protected	function	Stops test execution.
KernelTestBase::tearDown	protected	function		4
KernelTestBase::tearDownCloseDatabaseConnection	public	function	@after
KernelTestBase::vfsDump	protected	function	Dumps the current state of the virtual filesystem to STDOUT.
KernelTestBase::__sleep	public	function	Prevents serializing any properties.
PhpUnitWarnings::$deprecationWarnings	private static	property	Deprecation warnings from PHPUnit to raise with @trigger_error().
PhpUnitWarnings::addWarning	public	function	Converts PHPUnit deprecation warnings to E_USER_DEPRECATED.
RandomGeneratorTrait::$randomGenerator	protected	property	The random generator.
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.	1
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.
RandomGeneratorTrait::randomStringValidate	public	function	Callback for random string validation.
StorageCopyTrait::replaceStorageContents	protected static	function	Copy the configuration from one storage to another and remove stale items.
TestRequirementsTrait::checkModuleRequirements	private	function	Checks missing module requirements.
TestRequirementsTrait::checkRequirements	protected	function	Check module requirements for the Drupal use case.	1
TestRequirementsTrait::getDrupalRoot	protected static	function	Returns the Drupal root directory.

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class ConnectionTest in Drupal 9

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