BackdropUnitTestCase::setUp in modules/simpletest/backdrop_web_test_case.php

Sets up unit test environment.

BackdropWebTestCase::prepareEnvironment in modules/simpletest/backdrop_web_test_case.php

Prepares the current environment for running the test.

ConfigDatabaseStorage::exportArchive in drivers/config_database/config_database_storage.inc

Export an archive of configuration files from the config storage managed by this object.

ConfigFileStorage::initializeStorage in drivers/config_file/config_file_storage.inc

Create a configuration directory, if it does not already exist, and ensure it is writable by the site. Additionally, protect it with a .htaccess file.

FileDirectoryTest::testFileCheckDirectoryHandling in modules/simpletest/tests/file.test

Test directory handling functions.

file_prepare_directory in includes/file.inc

Checks that the directory exists and is writable.

image_install in modules/image/image.install

Implements hook_install().

image_style_create_derivative in modules/image/image.module

Creates a new image derivative based on an image style.

system_requirements in modules/system/system.install

Implements hook_requirements().