bootstrap.php

<?php

use Symfony\Component\Console\Input\ArgvInput;
use Symfony\Component\Filesystem\Filesystem;
use Symfony\Component\Process\Exception\ProcessFailedException;
use Symfony\Component\Process\Process;

define('NO_RECREATE_DB', (bool) getenv('NO_RECREATE_DB') ?: false);
define('CLEAR_CACHE', (bool) getenv('CLEAR_CACHE') ?: true);
define('RECREATE_DB', (bool) getenv('RECREATE_DB') ?: false);

gc_disable();
ini_set('memory_limit', -1);

// This file should be in "./tests/"
$rootDir = __DIR__.'/..';

// Place where we store phpunit logs & test databases
define('BUILD_DIR', $rootDir.'/build');

define('DATABASE_TEST_FILE', $rootDir.'/build/database_test.db');
define('DATABASE_REFERENCE_FILE', $rootDir.'/build/database_reference.db');

$file = $rootDir.'/vendor/autoload.php';
if (!file_exists($file)) {
    throw new RuntimeException('Install dependencies to run test suite.');
}

/** @var Composer\Autoload\ClassLoader $autoload */
$autoload = require $file;

(new \Symfony\Component\Dotenv\Dotenv())->load(__DIR__.'/../.env');

$input = new ArgvInput();

/**
 * Execute a command.
 *
 * @param string $cmd
 */
function runCommand($cmd) {
    $process = new Process($cmd);
    $process->setTimeout(180);
    $process->run(function ($type, $buffer) {
        if (Process::ERR === $type) {
            echo 'ERROR > '.$buffer;
        } else {
            echo $buffer;
        }
    });
    if (!$process->isSuccessful()) {
        throw new ProcessFailedException($process);
    }
}

if (!CLEAR_CACHE) {
    runCommand('php '.$rootDir.'/bin/console cache:clear --no-warmup');
    runCommand('php '.$rootDir.'/bin/console cache:warmup');
}

$fs = new Filesystem();

if (RECREATE_DB) {
    $fs->remove(DATABASE_REFERENCE_FILE);
    $fs->remove(DATABASE_TEST_FILE);
}

if ($fs->exists(DATABASE_REFERENCE_FILE)) {
    // Reset database everytime
    $fs->copy(DATABASE_REFERENCE_FILE, DATABASE_TEST_FILE, true);
    return;
}

if (NO_RECREATE_DB && file_exists($rootDir.'/build/database_reference.db')) {
    return;
}

// Remove build dir files
if (!is_dir($rootDir.'/build')) {
    $fs->mkdir($rootDir.'/build');
}

if ($fs->exists(DATABASE_TEST_FILE)) {
    $fs->remove(DATABASE_TEST_FILE);
}

runCommand('php '.$rootDir.'/bin/console doctrine:database:create');
runCommand('php '.$rootDir.'/bin/console doctrine:schema:create');
runCommand('php '.$rootDir.'/bin/console doctrine:fixtures:load --append');

$fs->copy(DATABASE_TEST_FILE, DATABASE_REFERENCE_FILE);

composer.json

{
    "name": "project/project",
    "license": "MIT",
    "type": "project",
    "autoload": {
        "psr-4": {
            "": "src/"
        },
        "classmap": [
            "app/AppKernel.php",
            "app/AppCache.php"
        ]
    },
    "autoload-dev": {
        "psr-4": {
            "Tests\\": "tests/"
        },
        "files": [
            "vendor/symfony/symfony/src/Symfony/Component/VarDumper/Resources/functions/dump.php"
        ]
    },
    "require-dev": {
        "symfony/process": "^3.2",
        "symfony/phpunit-bridge": "^3.2",
        "doctrine/doctrine-fixtures-bundle": "^2.3",
        "pierstoval/web-test-case": "^0.1.5",
        "phpunit/phpunit": "^5.7|^6.0"
    }
}

phpunit.xml.dist

<?xml version="1.0" encoding="UTF-8"?>
<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/5.7/phpunit.xsd"
         backupGlobals="false"
         backupStaticAttributes="false"
         convertErrorsToExceptions="true"
         convertNoticesToExceptions="true"
         convertWarningsToExceptions="true"
         processIsolation="false"
         stopOnFailure="false"
         colors="true"
         verbose="true"
         bootstrap="./tests/bootstrap.php"
         beStrictAboutTestsThatDoNotTestAnything="true"
         beStrictAboutOutputDuringTests="true"
         beStrictAboutTodoAnnotatedTests="true"
         beStrictAboutResourceUsageDuringSmallTests="true"
>

    <testsuites>
        <testsuite name="Project test suite">
            <directory>./src/*Bundle/Tests</directory>
            <directory>./src/*/*Bundle/Tests</directory>
            <exclude>./vendor</exclude>
        </testsuite>
    </testsuites>

    <!--%
    <logging>
        <log type="junit" target="./build/log/logfile.xml" />
        <log type="coverage-html" target="./build/log/report" lowUpperBound="35" highLowerBound="70" />
        <log type="coverage-clover" target="./build/log/clover.xml" />
        <log type="coverage-text" target="php://stdout" showUncoveredFiles="false" />
    </logging>
    %-->

    <php>
        <server name="KERNEL_DIR" value="./app/" />
        <ini name="error_reporting" value="-1" />
        <ini name="zend.enable_gc" value="0" />
        <env name="SYMFONY_ENV" value="test" />
        <env name="SYMFONY_DEBUG" value="0" />
        <!-- Uncomment this if you do not need to refresh the whole cache between runs
        <env name="NO_CLEAR_CACHE" value="1" />
        -->
        <!-- Uncomment this if you don't want to reset the database between runs
        <env name="NO_RECREATE_DB" value="1" />
        -->
        <!-- Uncomment this if you want to force database recreation between runs
        <env name="RECREATE_DB" value="1" />
        -->
    </php>

    <filter>
        <whitelist processUncoveredFilesFromWhitelist="true">
            <directory>./src</directory>
            <exclude>
                <directory>./src/*Bundle/Resources</directory>
                <directory>./src/*/*Bundle/Resources</directory>
                <directory>./src/*/Bundle/*Bundle/Resources</directory>

                <directory>./src/*Bundle/DataFixtures</directory>
                <directory>./src/*/*Bundle/DataFixtures</directory>
                <directory>./src/*/Bundle/*Bundle/DataFixtures</directory>

                <directory>./src/*Bundle/Tests</directory>
                <directory>./src/*/*Bundle/Tests</directory>
                <directory>./src/*/Bundle/*Bundle/Tests</directory>

                <directory>./vendor</directory>
            </exclude>
        </whitelist>
    </filter>

</phpunit>