Codecoverage phpunit test issue - php

Question

I am running phpunit version 9.2 and I would like to know why my method is not covered in the phpunit coverage.
This is my class:
class Methods extends Template
{
const DISABLED_PAYMENT_METHODS_1 = 'free';
const DISABLED_PAYMENT_METHODS_2 = 'adyen_cc';
const DISABLED_PAYMENT_METHODS_3 = 'adyen_oneclick';
protected $paymentMethodList;
protected $storeManager;
protected $logger;
public function __construct(
Context $context,
PaymentMethodList $paymentMethodList,
StoreManagerInterface $storeManager,
LoggerInterface $logger,
array $data = []
) {
$this->paymentMethodList = $paymentMethodList;
$this->storeManager = $storeManager;
$this->logger = $logger;
parent::__construct($context, $data);
}
public function getPaymentMethods()
{
try {
$storeId = $this->storeManager->getStore()->getId();
$paymentList = $this->paymentMethodList->getActiveList($storeId);
$resultPayments = [];
foreach ($paymentList as $payment) {
if ($payment->getCode() !== self::DISABLED_PAYMENT_METHODS_1 &&
$payment->getCode() !== self::DISABLED_PAYMENT_METHODS_2 &&
$payment->getCode() !== self::DISABLED_PAYMENT_METHODS_3
) {
$resultPayments[] = $payment;
}
}
return $resultPayments;
} catch (Exception $e) {
$this->logger->error($e->getMessage());
return false;
}
}
}
and this is my test class:
class MethodsTest extends TestCase
{
private $model;
private function getSimpleMock($originalClassName)
{
return $this->getMockBuilder($originalClassName)
->disableOriginalConstructor()
->getMock();
}
public function setUp() : void
{
$context = $this->getSimpleMock(Context::class);
$paymentMethodList = $this->getSimpleMock(PaymentMethodList::class);
$storeManager = $this->getSimpleMock(StoreManagerInterface::class);
$logger = $this->getSimpleMock(LoggerInterface::class);
$this->model = new Methods(
$context,
$paymentMethodList,
$storeManager,
$logger,
[]
);
}
public function testGetPaymentMethods()
{
$stub = $this->createMock(Methods::class);
$stub->method('getPaymentMethods')
->willReturn([]);
try {
$stub->getPaymentMethods();
$this->fail("Expected exception!");
} catch (\Exception $error) {
$this->assertEquals("Expected exception!", $error->getMessage());
}
}
}
When I run the command to get the coverage. I am getting:
I am really curious why my test is not covered or at least the exception part ? Would you please share you ideas why ? and what can i do in order to fix this ? Right now I got a 29 % and I would like to get at least 60% coverage.
Thank you

Answer 1

On this line $stub = $this->createMock(Methods::class); you are creating a mock of the Methods class, so not actually testing the real class.
You will need to use the object you created in your setUp() method, and set up mock returns on the dependencies you passed in (perhaps converting some of them to be class properties).

Answer 2

You should test the real class, as example:
public function testGetPaymentMethods()
{
// define a payment
$paymentFreeCode = $this->createMock(Payment::class);
$paymentFreeCode->method('getcode')
->willReturn("free");
// define a payment
$payment = $this->createMock(Payment::class);
$payment->method('getcode')
->willReturn("invalid-code");
$paymentList = [
$paymentFreeCode,
$payment,
];
// define a store
$store = $this->createMock(Store::class);
$store->method('getId')
->willReturn("my-store-id");
// return store from the store manager
$this->storeManager->method('getStore')
->willReturn(myStore);
// return the payment list
$this->paymentMethodList->method('getActiveList')->with("my-store-id")
->willReturn($paymentList);
// call the real class instrumented with mocks
$paymentMethods = $this->model->getPaymentMethods();
$this->assertIsArray($paymentMethods);
$this->assertCount($paymentMethods, 1);
}