MDL-61951 core_grading: Several fixes to the privacy implementation

- Fixed legacy polyfill method definitions
- Added unit test for legacy polyfill
- Fixed delete_gradingform_for_userid in gradingform provider

grade/grading/classes/privacy/gradingform_legacy_polyfill.php

@@ -39,20 +39,20 @@ trait gradingform_legacy_polyfill {
     /**
      * This method is used to export any user data this sub-plugin has using the object to get the context and userid.
      *
-     * @param \context $context Context owner of the data.
-     * @param \stdClass $definition Grading definition entry to export.
-     * @param  int $userid The user whose information is to be exported.
+     * @param context $context Context owner of the data.
+     * @param stdClass $definition Grading definition entry to export.
+     * @param int $userid The user whose information is to be exported.
      *
-     * @return \stdClass The data to export.
+     * @return stdClass The data to export.
      */
-    public static function get_gradingform_export_data(\context $context, $definition, $userid) {
+    public static function get_gradingform_export_data(\context $context, $definition, int $userid) {
         return static::_get_gradingform_export_data($context, $definition, $userid);
     }
 
     /**
      * Any call to this method should delete all user data for the context defined.
      *
-     * @param \context $context Context owner of the data.
+     * @param context $context Context owner of the data.
      */
     public static function delete_gradingform_for_context(\context $context) {
         static::_delete_gradingform_for_context($context);
@@ -61,9 +61,10 @@ trait gradingform_legacy_polyfill {
     /**
      * A call to this method should delete user data (where practicle) from the userid and context.
      *
-     * @param approved_contextlist $contextlist The approved contexts and user information to delete information for.
+     * @param int $userid The user whose information is to be deleted.
+     * @param context $context Context owner of the data.
      */
-    public static function delete_gradingform_for_userid(approved_contextlist $contextlist) {
-        static::delete_gradingform_for_userid($contextlist);
+    public static function delete_gradingform_for_userid(int $userid, \context $context) {
+        static::_delete_gradingform_for_userid($userid, $context);
     }
 }

grade/grading/classes/privacy/gradingform_provider.php

@@ -31,7 +31,7 @@ defined('MOODLE_INTERNAL') || die();
 use core_privacy\local\request\approved_contextlist;
 
 interface gradingform_provider extends
-    \core_privacy\local\request\plugin\subplugin_provider {
+    \core_privacy\local\request\plugin\subsystem_provider {
 
     /**
      * This method is used to export any user data this sub-plugin has using the object to get the context and userid.
@@ -54,7 +54,8 @@ interface gradingform_provider extends
     /**
      * A call to this method should delete user data (where practicle) from the userid and context.
      *
-     * @param approved_contextlist $contextlist The approved contexts and user information to delete information for.
+     * @param int $userid The user to delete.
+     * @param \context $context the context to refine the deletion.
      */
-    public static function delete_gradingform_for_userid(approved_contextlist $contextlist);
+    public static function delete_gradingform_for_userid(int $userid, \context $context);
 }

grade/grading/tests/privacy_legacy_polyfill_test.php

@@ -0,0 +1,162 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Unit tests for the privacy legacy polyfill for gradingform.
+ *
+ * @package     core_grading
+ * @category    test
+ * @copyright   2018 Jake Dallimore <[email protected]>
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+
+/**
+ * Unit tests for the Grading API's privacy legacy_polyfill.
+ *
+ * @copyright   2018 Jake Dallimore <[email protected]>
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class gradeform_privacy_legacy_polyfill_test extends advanced_testcase {
+    /**
+     * Test that the core_grading\privacy\legacy_polyfill works and that the static _get_grading_export_data can be called.
+     */
+    public function test_get_gradingform_export_data() {
+        $userid = 476;
+        $context = context_system::instance();
+
+        $mock = $this->createMock(test_gradingform_legacy_polyfill_mock_wrapper::class);
+        $mock->expects($this->once())
+            ->method('get_return_value')
+            ->with('_get_gradingform_export_data', [$context, (object)[], $userid]);
+
+        test_legacy_polyfill_gradingform_provider::$mock = $mock;
+        test_legacy_polyfill_gradingform_provider::get_gradingform_export_data($context, (object)[], $userid);
+    }
+
+    /**
+     * Test for _get_metadata shim.
+     */
+    public function test_get_metadata() {
+        $collection = new \core_privacy\local\metadata\collection('core_gradingform');
+        $this->assertSame($collection, test_legacy_polyfill_gradingform_provider::get_metadata($collection));
+    }
+
+    /**
+     * Test the _delete_gradingform_for_context shim.
+     */
+    public function test_delete_gradingform_for_context() {
+        $context = context_system::instance();
+
+        $mock = $this->createMock(test_gradingform_legacy_polyfill_mock_wrapper::class);
+        $mock->expects($this->once())
+            ->method('get_return_value')
+            ->with('_delete_gradingform_for_context', [$context]);
+
+        test_legacy_polyfill_gradingform_provider::$mock = $mock;
+        test_legacy_polyfill_gradingform_provider::delete_gradingform_for_context($context);
+    }
+
+    /**
+     * Test the _delete_gradingform_for_context shim.
+     */
+    public function test_delete_gradingform_for_user() {
+        $userid = 696;
+        $context = \context_system::instance();
+
+        $mock = $this->createMock(test_gradingform_legacy_polyfill_mock_wrapper::class);
+        $mock->expects($this->once())
+            ->method('get_return_value')
+            ->with('_delete_gradingform_for_userid', [$userid, $context]);
+
+        test_legacy_polyfill_gradingform_provider::$mock = $mock;
+        test_legacy_polyfill_gradingform_provider::delete_gradingform_for_userid($userid, $context);
+    }
+}
+
+/**
+ * Legacy polyfill test class for the gradingform_provider.
+ *
+ * @copyright   2018 Jake Dallimore <[email protected]>
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class test_legacy_polyfill_gradingform_provider implements
+    \core_privacy\local\metadata\provider,
+    \core_grading\privacy\gradingform_provider {
+
+    use \core_grading\privacy\gradingform_legacy_polyfill;
+    use \core_privacy\local\legacy_polyfill;
+
+    /**
+     * @var test_legacy_polyfill_gradingform_provider $mock.
+     */
+    public static $mock = null;
+
+    /**
+     * Export all user data for the gradingform plugin.
+     *
+     * @param context $context
+     * @param stdClass $definition
+     * @param int $userid
+     */
+    protected static function _get_gradingform_export_data(\context $context, $definition, $userid) {
+        static::$mock->get_return_value(__FUNCTION__, func_get_args());
+    }
+
+    /**
+     * Deletes all user data for the given context.
+     *
+     * @param context $context
+     */
+    protected static function _delete_gradingform_for_context(\context $context) {
+        static::$mock->get_return_value(__FUNCTION__, func_get_args());
+    }
+
+    /**
+     * Delete personal data for the given user and context.
+     *
+     * @param int $userid
+     * @param context $context
+     */
+    protected static function _delete_gradingform_for_userid($userid, \context $context) {
+        static::$mock->get_return_value(__FUNCTION__, func_get_args());
+    }
+
+    /**
+     * Returns metadata about this plugin.
+     *
+     * @param   \core_privacy\local\metadata\collection $collection The initialised collection to add items to.
+     * @return  \core_privacy\local\metadata\collection     A listing of user data stored through this system.
+     */
+    protected static function _get_metadata(\core_privacy\local\metadata\collection $collection) {
+        return $collection;
+    }
+}
+
+/**
+ * Called inside the polyfill methods in the test polyfill provider, allowing us to ensure these are called with correct params.
+ *
+ * @copyright   2018 Jake Dallimore <[email protected]>
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class test_gradingform_legacy_polyfill_mock_wrapper {
+    /**
+     * Get the return value for the specified item.
+     */
+    public function get_return_value() {
+    }
+}