setUp () 方法要设置返回值类型声明
public function setUp(): void
{
parent::setUp();
$this->user = factory(User::class)->create();
}
如果不加 : void 的话会报错
PHP Fatal error: Declaration of Tests\Feature\TopicApiTest::setUp() must be compatible with Illuminate\Foundation\Testing\TestCase::setUp(): void in /home/vagrant/code/bbs/tests/Feature/TopicApiTest.php on line 12
参考
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