getFunctionMock('Zotlabs\Lib', 'mail') ->expects($this->once()) ->with( $this->identicalTo($recipient), $this->identicalTo($subject), $this->identicalTo($body), $this->identicalTo(<< Reply-To: Content-Type: text/plain; charset=UTF-8 EOF ) ) ->willReturn(true); $mailer = new Mailer([ 'toEmail' => $recipient, 'messageSubject' => $subject, 'textVersion' => $body, ]); $mailer->deliver(); } }