ZF2 phpunit Zend Logger - php

Question

I am trying to write unit test for my application. which as logging the information functionality.
To start with i have service called LogInfo, this how my class look like
use Zend\Log\Logger;
class LogInfo {
$logger = new Logger;
return $logger;
}
I have another class which will process data. which is below.
class Processor
{
public $log;
public function processData($file)
{
$this->log = $this->getLoggerObj('data');
$this->log->info("Received File");
}
public function getLoggerObj($logType)
{
return $this->getServiceLocator()->get('Processor\Service\LogInfo')->logger($logType);
}
}
here i am calling service Loginfo and using it and writing information in a file.
now i need to write phpunit for class Processor
below is my unit test cases
class ProcessorTest{
public function setUp() {
$mockLog = $this->getMockBuilder('FileProcessor\Service\LogInfo', array('logger'))->disableOriginalConstructor()->getMock();
$mockLogger = $this->getMockBuilder('Zend\Log\Logger', array('info'))->disableOriginalConstructor()->getMock();
$serviceManager = new ServiceManager();
$serviceManager->setService('FileProcessor\Service\LogInfo', $mockLog);
$serviceManager->setService('Zend\Log\Logger', $mockLogger);
$this->fileProcessor = new Processor();
$this->fileProcessor->setServiceLocator($serviceManager);
}
public function testProcess() {
$data = 'I have data here';
$this->fileProcessor->processData($data);
}
}
I try to run it, i am getting an error "......PHP Fatal error: Call to a member function info() on a non-object in"
i am not sure , how can i mock Zend logger and pass it to class.

Answer 1

Lets check out some of your code first, starting with the actual test class ProcessorTest. This class constructs a new ServiceManager(). This means you are going to have to do this in every test class, which is not efficient (DRY). I would suggest constructing the ServiceMananger like the Zend Framework 2 documentation describes in the headline Bootstrapping your tests. The following code is the method we are interested in.
public static function getServiceManager()
{
return static::$serviceManager;
}
Using this approach makes it possible to obtain the instance of ServiceManager through Bootstrap::getServiceManager(). Lets refactor the test class using this method.
class ProcessorTest
{
protected $serviceManager;
protected $fileProcessor;
public function setUp()
{
$this->serviceManager = Bootstrap::getServiceManager();
$this->serviceManager->setAllowOverride(true);
$fileProcessor = new Processor();
$fileProcessor->setServiceLocator($this->serviceManager);
$this->fileProcessor = $fileProcessor;
}
public function testProcess()
{
$mockLog = $this->getMockBuilder('FileProcessor\Service\LogInfo', array('logger'))
->disableOriginalConstructor()
->getMock();
$mockLogger = $this->getMockBuilder('Zend\Log\Logger', array('info'))
->disableOriginalConstructor()
->getMock();
$serviceManager->setService('FileProcessor\Service\LogInfo', $mockLog);
$serviceManager->setService('Zend\Log\Logger', $mockLogger);
$data = 'I have data here';
$this->fileProcessor->processData($data);
}
}
This method also makes it possible to change expectations on the mock objects per test function. The Processor instance is constructed in ProcessorTest::setUp() which should be possible in this case.
Any way this does not solve your problem yet. I can see Processor::getLoggerObj() asks the ServiceManager for the service 'Processor\Service\LogInfo' but your test class does not set this instance anywhere. Make sure you set this service in your test class like the following example.
$this->serviceManager->setService('Processor\Service\LogInfo', $processor);