How to test CakeEmail is called from a model - cakephp

Question

In CakePHP 2.1 I'm trying to test that the CakeEmail::to() method is called from my model test case with the correct "to" email (In this example: cat#gmail.com).
I want the following test to pass but I get:
Expectation failed for method name is equal to <string:to> when invoked 1 time(s).
Method was expected to be called 1 times, actually called 0 times.
Here's the code in the Model and the test case:
<?php
// Model/Job.php
App::uses('AppModel', 'Model');
App::uses('CakeEmail', 'Network/Email');
class Job extends AppModel {
public function emailCat() {
$CakeEmail = new CakeEmail();
$CakeEmail->to('cat#gmail.com');
$CakeEmail->subject('hello!');
$CakeEmail->emailFormat('text');
$CakeEmail->config('default');
$CakeEmail->send('hi');
}
}
// Test/Model/JobTest.php
class JobTestCase extends CakeTestCase {
public function setUp() {
parent::setUp();
$this->Job = ClassRegistry::init('Job');
}
public function testEmailCat() {
// I want to assert CakeEmail::to() is called with correct email
$CakeEmail = $this->getMock('CakeEmail' , array('to'));
$CakeEmail->expects($this->once())
->method('to')
->with($this->equalTo('cat#gmail.com'));
$result = $this->Job->emailCat();
}
}

Answer 1

The problem is that you're mocking a completely different class then the one that is actually used on the model. On your model function, you instantiate a brand new email class which will be mocked. Instead, you need to make sure that the CakeEmail object that the model uses is the one mocked.
class Job extends AppModel {
public $CakeEmail = null;
public function emailCat() {
if (!$CakeEmail) {
$this->CakeEmail = new CakeEmail();
}
$this->CakeEmail = new CakeEmail();
$this->CakeEmail->to('cat#gmail.com');
$this->CakeEmail->subject('hello!');
$this->CakeEmail->emailFormat('text');
$this->CakeEmail->config('default');
$this->CakeEmail->send('hi');
}
}
Then update your test case to set the mock object on your Job model.
class JobTestCase extends CakeTestCase {
public function setUp() {
parent::setUp();
$this->Job = ClassRegistry::init('Job');
}
public function testEmailCat() {
// I want to assert CakeEmail::to() is called with correct email
$CakeEmail = $this->getMock('CakeEmail' , array('to'));
$CakeEmail->expects($this->once())
->method('to')
->with($this->equalTo('cat#gmail.com'));
// use mock object instead of creating a brand new one
$this->Job->CakeEmail = $CakeEmail;
$result = $this->Job->emailCat();
}
}