From e143bae8eab0c3ada2bae7cd78cf24940052de3e Mon Sep 17 00:00:00 2001
From: Zig Tan <zig@moodle.com>
Date: Wed, 28 Feb 2018 15:47:56 +0800
Subject: [PATCH] MDL-61307 core_tag: Unit tests for privacy implementation

---
 tag/tests/privacy_test.php | 89 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 tag/tests/privacy_test.php

diff --git a/tag/tests/privacy_test.php b/tag/tests/privacy_test.php
new file mode 100644
index 00000000000..db48c381b59
--- /dev/null
+++ b/tag/tests/privacy_test.php
@@ -0,0 +1,89 @@
+<?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/>.
+
+/**
+ * Privacy tests for core_tag.
+ *
+ * @package    core_comment
+ * @category   test
+ * @copyright  2018 Zig Tan <zig@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+global $CFG;
+
+require_once($CFG->dirroot . '/tag/lib.php');
+
+use \core_privacy\tests\provider_testcase;
+use \core_privacy\local\request\writer;
+use \core_tag\privacy\provider;
+
+/**
+ * Unit tests for tag/classes/privacy/policy
+ *
+ * @copyright  2018 Zig Tan <zig@moodle.com>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class core_tag_privacy_testcase extends provider_testcase {
+
+    /**
+     * Check the exporting of tags for a user id in a context.
+     */
+    public function test_export_tags() {
+        global $DB;
+
+        $this->resetAfterTest(true);
+
+        // Create a user to perform tagging.
+        $user = $this->getDataGenerator()->create_user();
+        $this->setUser($user);
+
+        // Create a course to tag.
+        $course = $this->getDataGenerator()->create_course();
+        $context = context_course::instance($course->id);
+        $subcontext = [];
+
+        // Create three dummy tags and tag instances.
+        $dummytags = [ 'Tag 1', 'Tag 2', 'Tag 3' ];
+        core_tag_tag::set_item_tags('core_course', 'course', $course->id, context_course::instance($course->id),
+                                    $dummytags, $user->id);
+
+        // Get the tag instances that should have been created.
+        $taginstances = $DB->get_records('tag_instance', array('itemtype' => 'course', 'itemid' => $course->id));
+        $this->assertCount(count($dummytags), $taginstances);
+
+        // Check tag instances match the component and context.
+        foreach ($taginstances as $taginstance) {
+            $this->assertEquals('core_course', $taginstance->component);
+            $this->assertEquals(context_course::instance($course->id)->id, $taginstance->contextid);
+        }
+
+        // Retrieve tags only for this user.
+        provider::export_item_tags($user->id, $context, $subcontext, 'core_course', 'course', $course->id, true);
+
+        $writer = writer::with_context($context);
+        $this->assertTrue($writer->has_any_data());
+
+        $exportedtags = $writer->get_related_data($subcontext, 'tags');
+        $this->assertCount(count($dummytags), $exportedtags);
+
+        // Check the exported tag's rawname is found in the initial dummy tags.
+        foreach ($exportedtags as $exportedtag) {
+            $this->assertContains($exportedtag->rawname, $dummytags);
+        }
+    }
+}