MDL-72837 core_cache: Rename unit test classes to new standard

For the three unit tests that are going to be modified in future
commit, I first changed them to use a namespace and class name
matching filename, as per current standard.

cache/tests/cache_test.php

@@ -14,32 +14,44 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
-/**
- * PHPunit tests for the cache API
- *
- * This file is part of Moodle's cache API, affectionately called MUC.
- * It contains the components that are requried in order to use caching.
- *
- * @package    core
- * @category   cache
- * @copyright  2012 Sam Hemelryk
- * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
+namespace core_cache;
 
-defined('MOODLE_INTERNAL') || die();
-
-// Include the necessary evils.
-global $CFG;
-require_once($CFG->dirroot.'/cache/locallib.php');
-require_once($CFG->dirroot.'/cache/tests/fixtures/lib.php');
+use advanced_testcase;
+use cache;
+use cache_config;
+use cache_config_testing;
+use cache_factory;
+use cache_helper;
+use cache_loader;
+use cache_phpunit_application;
+use cache_phpunit_cache;
+use cache_phpunit_dummy_object;
+use cache_phpunit_factory;
+use cache_phpunit_session;
+use cacheable_object_array;
+use cache_store;
+use coding_exception;
+use Exception;
+use stdClass;
 
 /**
  * PHPunit tests for the cache API
  *
+ * @package    core_cache
  * @copyright  2012 Sam Hemelryk
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-class core_cache_testcase extends advanced_testcase {
+class cache_test extends advanced_testcase {
+
+    /**
+     * Load required libraries and fixtures.
+     */
+    public static function setUpBeforeClass(): void {
+        global $CFG;
+
+        require_once($CFG->dirroot . '/cache/locallib.php');
+        require_once($CFG->dirroot . '/cache/tests/fixtures/lib.php');
+    }
 
     /**
      * Set things back to the default before each test.

course/tests/courselib_test.php

@@ -14,23 +14,61 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
+namespace core_course;
+
+use advanced_testcase;
+use backup_controller;
+use backup;
+use blog_entry;
+use cache;
+use calendar_event;
+use coding_exception;
+use comment;
+use completion_criteria_date;
+use completion_completion;
+use context_course;
+use context_module;
+use context_system;
+use context_coursecat;
+use core_completion_external;
+use core_external;
+use core_tag_index_builder;
+use core_tag_tag;
+use course_capability_assignment;
+use course_request;
+use core_course_category;
+use enrol_imsenterprise_testcase;
+use external_api;
+use grade_item;
+use grading_manager;
+use moodle_exception;
+use moodle_url;
+use phpunit_util;
+use rating_manager;
+use restore_controller;
+use stdClass;
+use testing_data_generator;
+
 /**
  * Course related unit tests
  *
- * @package    core
+ * @package    core_course
  * @category   phpunit
  * @copyright  2012 Petr Skoda {@link http://skodak.org}
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
+class courselib_test extends advanced_testcase {
 
-defined('MOODLE_INTERNAL') || die();
+    /**
+     * Load required libraries and fixtures.
+     */
+    public static function setUpBeforeClass(): void {
+        global $CFG;
 
-global $CFG;
-require_once($CFG->dirroot . '/course/lib.php');
-require_once($CFG->dirroot . '/course/tests/fixtures/course_capability_assignment.php');
-require_once($CFG->dirroot . '/enrol/imsenterprise/tests/imsenterprise_test.php');
-
-class core_course_courselib_testcase extends advanced_testcase {
+        require_once($CFG->dirroot . '/course/lib.php');
+        require_once($CFG->dirroot . '/course/tests/fixtures/course_capability_assignment.php');
+        require_once($CFG->dirroot . '/enrol/imsenterprise/tests/imsenterprise_test.php');
+    }
 
     /**
      * Set forum specific test values for calling create_module().

lib/tests/modinfolib_test.php

@@ -14,23 +14,25 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
+namespace core;
+
+use advanced_testcase;
+use cache;
+use cm_info;
+use coding_exception;
+use context_course;
+use context_module;
+use course_modinfo;
+use moodle_exception;
+use moodle_url;
+use Exception;
+
 /**
  * Unit tests for lib/modinfolib.php.
  *
  * @package    core
  * @category   phpunit
  * @copyright  2012 Andrew Davis
- */
-
-defined('MOODLE_INTERNAL') || die();
-
-global $CFG;
-require_once($CFG->libdir . '/modinfolib.php');
-
-/**
- * Unit tests for modinfolib.php
- *
- * @copyright 2012 Andrew Davis
  * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class modinfolib_test extends advanced_testcase {