首次运行 phpunit 报错 Expected status code 201 but received 500 的解决方案。

10.2. Laravel API 集成测试之测试发布话题，修改完tests/Feature/TopicApiTest.php后首次$phpunit运行报错：

There was 1 failure:

1) Tests\Feature\TopicApiTest::testStoreTopic
Expected status code 201 but received 500.
Failed asserting that false is true.

/home/vagrant/Code/larabbs/vendor/laravel/framework/src/Illuminate/Foundation/Testing/TestResponse.php:185
/home/vagrant/Code/larabbs/tests/Feature/TopicApiTest.php:40

FAILURES!
Tests: 2, Assertions: 2, Failures: 1.

发生错误时，寻找错误原因的文件：

C:\Users\Administrator\Code\larabbs\storage\logs\laravel.log

因为 9.3. 本地化之添加测试代码章节，教程修改了store()：

比如我们在 发布话题 接口的代码中增加下面的测试代码：
app/Http/Controllers/Api/TopicsController.php
...
public function store(TopicRequest $request, Topic $topic)
{
    return $this->errorResponse(403, '您还没有通过认证', 1003);
...

而6.2. 发布话题之4. 增加 Controller原来store()如下：

    public function store(TopicRequest $request, Topic $topic)
    {
        $topic->fill($request->all());
        $topic->user_id = $request->user()->id;
        $topic->save();

        return new TopicResource($topic);
    }

初学者很容易将store()改错，误删除return那一行以上的几行代码。建议 9.3. 本地化之添加测试代码章节，教程修改了store()：在return之前增加…，修改如下，不会引起歧义：

public function store(TopicRequest $request, Topic $topic)
{   .
    .
    .
    return $this->errorResponse(403, '您还没有通过认证', 1003);

将store函数修成6.2章节原样之后，再次运行$phpunit(用不到\larabbs\tests\Feature\ExampleTest.php，我把内容注释掉了)

vagrant@homestead:~/Code/larabbs$ phpunit
PHP Warning:  Unterminated comment starting line 16 in /home/vagrant/Code/larabbs/tests/Feature/ExampleTest.php on line 16

Warning: Unterminated comment starting line 16 in /home/vagrant/Code/larabbs/tests/Feature/ExampleTest.php on line 16
<!-- PHPUnit 8.5.8 by Sebastian Bergmann and contributors.

..                                                                  2 / 2 (100%)

Time: 22.05 seconds, Memory: 34.50 MB

OK (2 tests, 6 assertions)