composer require --dev symfony/phpunit-bridge

.env.test

@@ -0,0 +1,4 @@
+# define your env variables for the test env here
+KERNEL_CLASS='App\Kernel'
+APP_SECRET='s$cretf0rt3st'
+SYMFONY_DEPRECATIONS_HELPER=999999

.gitignore

@@ -12,3 +12,8 @@
 ###> symfony/web-server-bundle ###
 /.web-server-pid
 ###< symfony/web-server-bundle ###
+
+###> symfony/phpunit-bridge ###
+.phpunit
+/phpunit.xml
+###< symfony/phpunit-bridge ###

bin/phpunit

@@ -0,0 +1,19 @@
+#!/usr/bin/env php
+<?php
+
+if (!file_exists(dirname(__DIR__).'/vendor/symfony/phpunit-bridge/bin/simple-phpunit')) {
+    echo "Unable to find the `simple-phpunit` script in `vendor/symfony/phpunit-bridge/bin/`.\n";
+    exit(1);
+}
+
+if (false === getenv('SYMFONY_PHPUNIT_VERSION')) {
+    putenv('SYMFONY_PHPUNIT_VERSION=6.5');
+}
+if (false === getenv('SYMFONY_PHPUNIT_REMOVE')) {
+    putenv('SYMFONY_PHPUNIT_REMOVE=');
+}
+if (false === getenv('SYMFONY_PHPUNIT_DIR')) {
+    putenv('SYMFONY_PHPUNIT_DIR='.__DIR__.'/.phpunit');
+}
+
+require dirname(__DIR__).'/vendor/symfony/phpunit-bridge/bin/simple-phpunit';

composer.json

@@ -36,6 +36,7 @@
         "doctrine/doctrine-fixtures-bundle": "^3.1",
         "symfony/debug-pack": "^1.0",
         "symfony/dotenv": "^4.2",
+        "symfony/phpunit-bridge": "^4.2",
         "symfony/profiler-pack": "^1.0",
         "symfony/web-server-bundle": "^4.2"
     },

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "b2efcf2213eb068842d3ad2b85667014",
+    "content-hash": "fdd4f42890e074443a6a40e031864ff0",
     "packages": [
         {
             "name": "doctrine/annotations",
@@ -5156,6 +5156,72 @@
             ],
             "time": "2018-11-04T09:58:13+00:00"
         },
+        {
+            "name": "symfony/phpunit-bridge",
+            "version": "v4.2.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/phpunit-bridge.git",
+                "reference": "4d53b78ee50da242dffa4eb91ea1f0ee084945c5"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/phpunit-bridge/zipball/4d53b78ee50da242dffa4eb91ea1f0ee084945c5",
+                "reference": "4d53b78ee50da242dffa4eb91ea1f0ee084945c5",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "conflict": {
+                "phpunit/phpunit": "<4.8.35|<5.4.3,>=5.0"
+            },
+            "suggest": {
+                "ext-zip": "Zip support is required when using bin/simple-phpunit",
+                "symfony/debug": "For tracking deprecated interfaces usages at runtime with DebugClassLoader"
+            },
+            "bin": [
+                "bin/simple-phpunit"
+            ],
+            "type": "symfony-bridge",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "4.2-dev"
+                },
+                "thanks": {
+                    "name": "phpunit/phpunit",
+                    "url": "https://github.com/sebastianbergmann/phpunit"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "bootstrap.php"
+                ],
+                "psr-4": {
+                    "Symfony\\Bridge\\PhpUnit\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony PHPUnit Bridge",
+            "homepage": "https://symfony.com",
+            "time": "2019-01-03T09:07:35+00:00"
+        },
         {
             "name": "symfony/polyfill-php72",
             "version": "v1.10.0",

phpunit.xml.dist

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!-- https://phpunit.de/manual/current/en/appendixes.configuration.html -->
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/6.5/phpunit.xsd"
+         backupGlobals="false"
+         colors="true"
+         bootstrap="config/bootstrap.php"
+>
+    <php>
+        <ini name="error_reporting" value="-1" />
+        <env name="APP_ENV" value="test" />
+        <env name="SHELL_VERBOSITY" value="-1" />
+    </php>
+
+    <testsuites>
+        <testsuite name="Project Test Suite">
+            <directory>tests</directory>
+        </testsuite>
+    </testsuites>
+
+    <filter>
+        <whitelist>
+            <directory>src</directory>
+        </whitelist>
+    </filter>
+
+    <listeners>
+        <listener class="Symfony\Bridge\PhpUnit\SymfonyTestsListener" />
+    </listeners>
+</phpunit>

symfony.lock

@@ -242,6 +242,15 @@
     "symfony/orm-pack": {
         "version": "v1.0.6"
     },
+    "symfony/phpunit-bridge": {
+        "version": "4.1",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "master",
+            "version": "4.1",
+            "ref": "0e548dd90adba18fabd4ef419b14d361fe4d6c74"
+        }
+    },
     "symfony/polyfill-ctype": {
         "version": "v1.10.0"
     },