Silex web test fails - php

Question

I'm trying to write a simple web test to test my silex api using phpunit but
I keep getting this error when i try to run it..
1) App\Tests\BlogControllerTest::testInitialPage
TypeError: Argument 1 passed to Symfony\Component\HttpKernel\Client::__construct() must implement interface Symfony\Component\HttpKernel\HttpKernelInterface, null given, called in C:\vendor\silex\silex\src\Silex\WebTestCase.php on line 63
This is my web test
<?php
namespace App\Tests;
use Silex\WebTestCase;
class BlogControllerTest extends WebTestCase
{
public function createApplication()
{
require dirname(dirname(__DIR__)) . '/src/Application.php';
}
public function testInitialPage()
{
$client = $this->createClient();
$crawler = $client->request('GET', '/Blog/1');
$this->assertTrue($client->getResponse()->isOk());
}
}
The content of my Composer file:
{
"require": {
"silex/silex": "~2.0",
"symfony/validator": "^4.0",
"crell/api-problem": "~1.7",
"tobiassjosten/responsible-service-provider": "^1.0"
},
"require-dev": {
"phpunit/phpunit": "6",
"symfony/browser-kit": "^4.0",
"symfony/css-selector": "^4.0"
},
"autoload": {
"psr-4": {
"App\\": "src/",
"Tests\\": "tests/"
}
}
}

Answer 1

From documentation:
For your WebTestCase, you will have to implement a createApplication method, which returns your application instance:
public function createApplication()
{
// app.php must return an Application instance
return require __DIR__.'/path/to/app.php';
}
So here's what you need:
public function createApplication()
{
return new Application();
}
But in the most cases it would be better to return configured application, from your bootstrap (bootstrap example):
public function createApplication()
{
require __DIR__.'../web/index-test.php'; // path to your bootstrap file
return $app;
}