PHPUnit call to undefined method `Mock_x_::method()`

Question

I'm trying to create my first phpunit test and find myself needing to stub a method on an IMailer interface.

interface IMailer
{
    public function send($to, $from, $cc, $subject, $body);
    public function sent();
}

    $mailer = $this->getMockBuilder(
        'IMailer',
        array('send', 'sent'))->getMock();

    $mailer->method('send')->willRreturn(0);

However, I keep getting

PHP Fatal error: 
  Call to undefined method Mock_Mailer_13fc0a04::method()
  in ...Test.php on line 16

a var_dump($mailer); results in

class Mock_IMailer_4c3e02a7#215 (1) {
  private $__phpunit_invocationMocker =>
  NULL
}

Working with the expect($this->any()) gives a dito error - it seems that the mocked object does not have any mock functionality...

I'm running phpunit 3.7.28, and php 5.5.9, on an ubuntu box.

How come? How can I fix it?

Answer 1

The getMockBuilder function accepts only the className as parameter. The correct way to initialize your mock object methods would be to use setMethods function (see phpunit docs)

   $mailer = $this->getMockBuilder('IMailer')
       ->setMethods(array('send', 'sent'))
       ->getMock();

Additionally you probably want to have some expects definition also when you use your mock object:

   $mailer->expects($this->any())
        ->method('send')
        ->willReturn(0);

EDIT

The above holds true for newer phpunit versions. For phpunit 3.7.28 the mock object usage is a bit different (i.e. the expects seems to be mandatory and willReturn is not yet available). For 3.7.28 version you should modify the second part to:

   $mailer->expects($this->any())
        ->method('send')
        ->will($this->returnValue(0));

I would recommend updating to later phpunit version as it seems to be somewhat difficult to find documentation to this much older releases.