diff --git a/element/daterange/tests/phpunit/element_test.php b/element/daterange/tests/phpunit/element_test.php
new file mode 100644
index 0000000..f709dbc
--- /dev/null
+++ b/element/daterange/tests/phpunit/element_test.php
@@ -0,0 +1,212 @@
+<?php
+// This file is part of the customcert module for 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/>.
+
+/**
+ * Test datarange element.
+ *
+ * @package    customcertelement_daterange
+ * @copyright  2018 Dmitrii Metelkin <dmitriim@catalyst-au.net>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+defined('MOODLE_INTERNAL') || die();
+
+global $CFG;
+
+require_once($CFG->dirroot . '/mod/customcert/element/daterange/tests/phpunit/fixtures/fake_datarange_element.php');
+
+class customcertelement_daterange_element_test extends advanced_testcase {
+
+    /**
+     * Helper function to build element data.
+     *
+     * @param stdClass $data Element data.
+     *
+     * @return object
+     */
+    protected function build_element_data(stdClass $data) {
+        return (object) [
+            'id' => 1,
+            'pageid' => 1,
+            'name' => 'Test',
+            'data' => json_encode($data),
+            'font' => 'Font',
+            'fontsize' => 1,
+            'colour' => '#EEE',
+            'posx' => 0,
+            'posy' => 0,
+            'width' => 100,
+            'refpoint' => 1
+        ];
+    }
+
+    /**
+     * Helper function to build datarange data.
+     *
+     * @param array $dataranges A list of dataranges.
+     * @param string $fallbackstring Fall back string.
+     *
+     * @return object
+     */
+    protected function build_datarange_data(array $dataranges, $fallbackstring = '') {
+        return (object) [
+            'dateitem' => 1,
+            'fallbackstring' => $fallbackstring,
+            'numranges' => count($dataranges),
+            'dateranges' => $dataranges,
+        ];
+    }
+
+    /**
+     * A helper function to get datarange element for testing.
+     *
+     * @param array $dataranges A list of dataranges.
+     * @param string $fallbackstring Fall back strin
+     *
+     * @return \fake_datarange_element
+     */
+    protected function get_datarange_element(array $dataranges, $fallbackstring = '') {
+        $datarangedata = $this->build_datarange_data($dataranges, $fallbackstring);
+        $elementdata = $this->build_element_data($datarangedata);
+
+        return new fake_datarange_element($elementdata);
+    }
+
+    /**
+     * Data provider for test_get_daterange_string_for_recurring_ranges.
+     * @return array
+     */
+    public function get_test_get_daterange_string_for_recurring_ranges_data_provider() {
+        return [
+            ['1.11.2016', 'WS 2016/2017'],
+            ['1.11.2017', 'WS 2017/2018'],
+            ['1.11.2018', 'WS 2018/2019'],
+            ['1.11.2019', 'WS 2019/2020'],
+            ['1.02.2017', 'WS 2016/2017'],
+            ['1.02.2018', 'WS 2017/2018'],
+            ['1.02.2019', 'WS 2018/2019'],
+            ['1.02.2020', 'WS 2019/2020'],
+            ['1.05.2016', 'SS 2016'],
+            ['1.05.2017', 'SS 2017'],
+            ['1.05.2018', 'SS 2018'],
+            ['1.05.2019', 'SS 2019'],
+        ];
+    }
+
+    /**
+     * Test get correct strings for recurring ranges.
+     *
+     * @dataProvider get_test_get_daterange_string_for_recurring_ranges_data_provider
+     *
+     * @param string $date Date to test.
+     * @param string $expected Expected result.
+     */
+    public function test_get_daterange_string_for_recurring_ranges($date, $expected) {
+        $dateranges = [
+            (object)[
+                'startdate' => strtotime('01.04.2017'),
+                'enddate' => strtotime('30.09.2017'),
+                'datestring' => 'SS {{date_year}}',
+                'recurring' => true,
+                'enabled' => true,
+            ],
+            (object)[
+                'startdate' => strtotime('01.10.2017'),
+                'enddate' => strtotime('31.03.2018'),
+                'datestring' => 'WS {{first_year}}/{{last_year}}',
+                'recurring' => true,
+                'enabled' => true,
+            ],
+        ];
+
+        $element = $this->get_datarange_element($dateranges);
+        $date = strtotime($date);
+        $this->assertEquals($expected, $element->get_daterange_string($date));
+    }
+
+    /**
+     * Test that first found element matched.
+     */
+    public function test_that_first_matched_range_applied_first() {
+        $dateranges = [
+            (object)[
+                'startdate' => strtotime('01.04.2017'),
+                'enddate' => strtotime('30.09.2017'),
+                'datestring' => 'First range',
+                'recurring' => false,
+                'enabled' => true,
+            ],
+            (object)[
+                'startdate' => strtotime('01.05.2017'),
+                'enddate' => strtotime('01.07.2018'),
+                'datestring' => 'Second range',
+                'recurring' => false,
+                'enabled' => true,
+            ],
+        ];
+
+        $element = $this->get_datarange_element($dateranges);
+        $date = strtotime('1.06.2017');
+        $this->assertEquals('First range', $element->get_daterange_string($date));
+    }
+
+    /**
+     * Test that placeholders correctly applied to matched range and fall back string.
+     */
+    public function test_placeholders_and_fall_back_string() {
+        $dateranges = [
+            (object)[
+                'startdate' => strtotime('01.04.2017'),
+                'enddate' => strtotime('30.09.2018'),
+                'datestring' => '{{current_year}} - {{first_year}} - {{last_year}} - {{date_year}}',
+                'recurring' => false,
+                'enabled' => true,
+            ],
+        ];
+
+        $fallbackstring = '{{current_year}} - {{first_year}} - {{last_year}} - {{date_year}}';
+        $element = $this->get_datarange_element($dateranges, $fallbackstring);
+
+        $date = strtotime('1.01.2000');
+        $expected = date('Y', time()) . ' - {{first_year}} - {{last_year}} - 2000';
+        $this->assertEquals($expected, $element->get_daterange_string($date));
+
+        $date = strtotime('1.07.2017');
+        $expected = date('Y', time()) . ' - 2017 - 2018 - 2017';
+        $this->assertEquals($expected, $element->get_daterange_string($date));
+    }
+
+    /**
+     * Test that nothing will be displayed if not matched and empty fall back string.
+     */
+    public function test_nothing_will_be_displayed_if_empty_fallback_string() {
+        $dateranges = [
+            (object)[
+                'startdate' => strtotime('01.04.2017'),
+                'enddate' => strtotime('30.09.2018'),
+                'datestring' => '{{current_year}} - {{first_year}} - {{last_year}} - {{date_year}}',
+                'recurring' => false,
+                'enabled' => true,
+            ],
+        ];
+
+        $fallbackstring = '';
+        $element = $this->get_datarange_element($dateranges, $fallbackstring);
+
+        $date = strtotime('1.07.2011');
+        $this->assertEquals($fallbackstring, $element->get_daterange_string($date));
+    }
+
+}
diff --git a/element/daterange/tests/phpunit/fixtures/fake_datarange_element.php b/element/daterange/tests/phpunit/fixtures/fake_datarange_element.php
new file mode 100644
index 0000000..ff6a18c
--- /dev/null
+++ b/element/daterange/tests/phpunit/fixtures/fake_datarange_element.php
@@ -0,0 +1,40 @@
+<?php
+// This file is part of the customcert module for 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/>.
+
+/**
+ * Fake datarange element for testing.
+ *
+ * @package    customcertelement_daterange
+ * @copyright  2018 Dmitrii Metelkin <dmitriim@catalyst-au.net>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+defined('MOODLE_INTERNAL') || die();
+
+class fake_datarange_element extends \customcertelement_daterange\element {
+
+    /**
+     * Override protected method for testing.
+     *
+     * @param int $date
+     *
+     * @return string
+     */
+    public function get_daterange_string($date) {
+        $result = parent::get_daterange_string($date);
+        return $result;
+    }
+}