[ticket/283] Mark shortened message test skipped if trimmessage not available

B3P-283

tests/functional/portal_announcement_test.php

@@ -59,6 +59,11 @@ class phpbb_functional_portal_announcement_test extends \board3\portal\tests\tes
 
 	public function test_shortened_message()
 	{
+		if (!class_exists('\nickvergessen\trimmessage\trim_message'))
+		{
+			$this->markTestSkipped('trimmessage is not available for testing.');
+		}
+
 		// Create topic as announcement
 		$data = $this->create_topic(2, 'Portal-announce-global', str_repeat('This is a global announcement for the portal', 6), array(
 			'topic_type'	=> POST_GLOBAL,