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After running `phpunit --filter test_import_theme_starter_content`, the following files were generated and left in place in the version-controlled `DIR_TESTDATA` directory, resulting in a dirty working copy of the project: {{{ tests/phpunit/data/images/canola-150x150.jpg tests/phpunit/data/images/canola-300x225.jpg }}} In the test, `canola.jpg` is mocked as an **existing attachment**. When the test invokes `WP_Customize_Manager::import_theme_starter_content()`, existing attachments are passed directly to `wp_generate_attachment_metadata()`, which does not make a copy of the file, and `wp_create_image_subsizes()` creates the above referenced files in the original image's location. By contrast, `waffles.jpg`, also used in the test, is **not** set as an existing attachment, and in `import_theme_starter_content()` is passed to `media_handle_sideload()`, which makes a **copy** of the file in the `wp-content/uploads/` directory, and then calls `wp_create_image_subsizes()` against the new file. The resulting sub-sizes are generated in that location, and are cleaned up during `tear_down()`. The test's `tear_down()` uses `remove_added_uploads()`, which only clears items created in `wp-content/uploads/` (i.e. `waffles*.jpg`), but not the files in the `DIR_TESTDATA` directory (`canola-*.jpg`). This commit addresses the issue by creating a copy of the file in uploads. This better matches the intention of the test, as existing attachments will most likely be located in uploads and not in an arbitrary path like the test data directory. Follow-up to [39276], [39346], [39411], [40142], [54424], [54425]. Props ironprogrammer, audrasjb, boniu91, dariak, SergeyBiryukov. Fixes #56807. git-svn-id: https://develop.svn.wordpress.org/trunk@54519 602fd350-edb4-49c9-b593-d223f7449a82
The short version: 1. Create a clean MySQL database and user. DO NOT USE AN EXISTING DATABASE or you will lose data, guaranteed. 2. Copy wp-tests-config-sample.php to wp-tests-config.php, edit it and include your database name/user/password. 3. $ svn up 4. Run the tests from the "trunk" directory: To execute a particular test: $ phpunit tests/phpunit/tests/test_case.php To execute all tests: $ phpunit Notes: Test cases live in the 'tests' subdirectory. All files in that directory will be included by default. Extend the WP_UnitTestCase class to ensure your test is run. phpunit will initialize and install a (more or less) complete running copy of WordPress each time it is run. This makes it possible to run functional interface and module tests against a fully working database and codebase, as opposed to pure unit tests with mock objects and stubs. Pure unit tests may be used also, of course. Changes to the test database will be rolled back as tests are finished, to ensure a clean start next time the tests are run. phpunit is intended to run at the command line, not via a web server.