public function testMTEmailTo() { $email = new MailTrapEmailAdapter(); $email->to('a@b.c', 'abc'); $reflection = new \ReflectionClass($email); $mailProp = $reflection->getProperty('tos'); $mailProp->setAccessible(true); $this->assertEquals([['a@b.c', 'abc']], $mailProp->getValue($email)); }