bar EOT; $test->_setRawContent($raw_content); $this->assertNotContains('foo', $test->_getTextContent()); $this->assertNotContains('', $test->_getTextContent()); $this->assertContains('bar', $test->_getTextContent()); } } class TestClass { use AssertContentTrait; public function _setRawContent($content) { $this->setRawContent($content); } public function _getTextContent() { return $this->getTextContent(); } }