所以我尝试为一个laravel应用程序编写单元测试，如下所示：

protected function setUp()
{
    parent::setUp();
    $this->disableMiddlewareForAllTests();
    $this->withoutExceptionHandling();
}

public function test_login_badRequest()
{
    $response = $this->call('post', '/login');
    $response->assertOk();
    $response->assertJson(['status' => 400]);
}

上面的工作正常，并提供以下输出：

Test 'Tests\Unit\LoginTest::test_login_badRequest' started
Test 'Tests\Unit\LoginTest::test_login_badRequest' ended
Time: 69 ms, Memory: 12.00MB
OK (1 test, 2 assertions)

但下一个测试是另一个故事：

public function test_login_goodRequest()
{
    $response = $this->call('post', '/login', [
        'email' => 'email@email.com',
        'password' => 'P4ssw0rd'
    ]);

    $response->assertOk();
    $response->assertJson(['status' => 200]);
}

一旦测试命中应用程序中的这一行代码：

/* Retrieve User associated with posted email address */
$user = $this->userModel
    ->where('email', $request->post('email'))
    ->get();
die('here');// <-- Happens in browser, does not happen in tests.

这是错误：

1) Tests\Unit\LoginTest::test_login_goodRequest
PDOException: SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known
/var/www/html/projects/laravel-template/vendor/laravel/framework/src/Illuminate/Database/Connectors/Connector.php:68 ...

几天来我一直在用我的头撞这个，你知道这是怎么回事吗，怎么让那个模具在测试中打印出来？干杯。
--laradock，docker，nginx，mysql，php 7.2.4-1+ubuntu16.04.1+deb.sury.org+1（cli）（构建时间：2018年4月5日08:53:57）（nts）版权所有（c）1997-2018 the php group zend engine v3.2.0，版权所有（c）1998-2018 zend technologies with zend opcache v7.2.4-1+ubuntu16.04.1+deb.sury.org+1，版权所有（c）1999-2018，由zend technologies提供
编辑时间：
.环境：

APP_NAME=Laravel
APP_ENV=local
APP_KEY=base64:Z+p6uA3G2DyCCFBXOPgrWwls1U6z/vi8Zi2r4eKHxEY=
APP_DEBUG=true
DEBUGBAR_ENABLED=true
APP_URL=http://localhost

LOG_CHANNEL=stack

DB_CONNECTION=mysql
DB_HOST=mysql
DB_PORT=3306
DB_DATABASE=sample_database
DB_USERNAME=root
DB_PASSWORD=root

BROADCAST_DRIVER=log
CACHE_DRIVER=file
SESSION_DRIVER=file
SESSION_LIFETIME=120
QUEUE_DRIVER=sync

REDIS_HOST=127.0.0.1
REDIS_PASSWORD=null
REDIS_PORT=6379

MAIL_DRIVER=smtp
MAIL_HOST=smtp.gmail.com
MAIL_PORT=587
MAIL_USERNAME=
MAIL_PASSWORD=
MAIL_ENCRYPTION=tls

PUSHER_APP_ID=
PUSHER_APP_KEY=
PUSHER_APP_SECRET=
PUSHER_APP_CLUSTER=mt1

MIX_PUSHER_APP_KEY="${PUSHER_APP_KEY}"
MIX_PUSHER_APP_CLUSTER="${PUSHER_APP_CLUSTER}"