Base existing tests on TestCase class

module/VuFind/tests/Code/ISBNTest.php

@@ -38,7 +38,7 @@ use VuFind\Code\ISBN;
  * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
  * @link     http://vufind.org/wiki/unit_tests Wiki
  */
-class ISBNTest extends \PHPUnit_Framework_TestCase
+class ISBNTest extends \VuFind\Tests\TestCase
 {
     /**
      * Test Valid ISBN-10.

module/VuFind/tests/Config/ReaderTest.php

@@ -38,7 +38,7 @@ use VuFind\Config\Reader;
  * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
  * @link     http://vufind.org/wiki/unit_tests Wiki
  */
-class ReaderTest extends \PHPUnit_Framework_TestCase
+class ReaderTest extends \VuFind\Tests\TestCase
 {
     /**
      * Test basic config.ini loading.

module/VuFind/tests/Date/ConverterTest.php

@@ -38,7 +38,7 @@ use VuFind\Date\Converter, VuFind\Exception\Date as DateException,
  * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
  * @link     http://www.vufind.org  Main Page
  */
-class ConverterTest extends \PHPUnit_Framework_TestCase
+class ConverterTest extends \VuFind\Tests\TestCase
 {
     protected $savedDateFormat = null;
     protected $savedTimeFormat = null;

module/VuFind/tests/Solr/UtilsTest.php

@@ -37,7 +37,7 @@ use VuFind\Solr\Utils;
  * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
  * @link     http://vufind.org/wiki/unit_tests Wiki
  */
-class UtilsTest extends \PHPUnit_Framework_TestCase
+class UtilsTest extends \VuFind\Tests\TestCase
 {
     /**
      * Test capitalizeBooleans functionality.