Cakephp 3 use mock to test controller - unit-testing

Question

I want to test a controller using a mock.
In my controller
public function myAction() {
$email = new MandrillApi(['template_name'=>'myTemplate']);
$result = $email
->subject('My title')
->from('no-reply#test.com')
->to('dest#test.com')
->send();
if ( isset($result[0]['status']) && $result[0]['status'] === 'sent' )
return $this->redirect(['action' => 'confirmForgotPassword']);
$this->Flash->error(__("Error"));
}
In test
public function testMyAction() {
$this->get("users/my-action");
$this->assertRedirect(['controller' => 'Users', 'action' => 'confirmForgotPassword']);
}
How do I mock the class MandrillApi ? thank you

Answer 1

In your controller-test:
public function controllerSpy($event){
parent::controllerSpy($event);
if (isset($this->_controller)) {
$MandrillApi = $this->getMock('App\Pathtotheclass\MandrillApi', array('subject', 'from', 'to', 'send'));
$this->_controller->MandrillApi = $MandrillApi;
$result = [
0 => [
'status' => 'sent'
]
];
$this->_controller->MandrillApi
->method('send')
->will($this->returnValue($result));
}
}
The controllerSpy method will insert the mocked object once the controller is setup correctly. You don't have to call the controllerSpy method, it gets executed automatically at some point after you make the $this->get(... call in your test.
Obviously you have to change the App\Pathtotheclass-part of the mock-generation to fit the location of your MandrillApi-class.