added template file for testcases

tests/filter_test.php

+<?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/>.
+
+/**
+ * Tests for filter_opencast.
+ *
+ * @package    filter_opencast
+ * @category   test
+ * @copyright  2020 Nina Herrmann
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+
+global $CFG;
+require_once($CFG->dirroot . '/filter/opencast/filter.php');
+
+/**
+ * Unit tests for Opencast filter.
+ *
+ * The Filter displays the data given from the repository opencast to an iFrame
+ *
+ * @package    filter_opencast
+ * @category   test
+ * @copyright  2020 Nina Herrmann WWU
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class filter_opencast_testcase extends advanced_testcase {
+
+    /** @var object The filter plugin object to perform the tests on */
+    protected $filter;
+
+    /**
+     * Setup the test framework
+     *
+     * @return void
+     */
+    protected function setUp() {
+        parent::setUp();
+        $this->resetAfterTest(true);
+        $this->filter = new filter_opencast(context_system::instance(), array());
+    }
+
+    /**
+     * Perform the actual tests, once the unit test is set up.
+     *
+     * @return void
+     */
+    public function test_filter_opencast() {
+        global $CFG;
+
+        $filter = new filter_opencast;
+        $string = $filter->filter('www.some.de/url/');
+        $this->assertEquals('', '');
+    }
+}