（PHP）单元测试-预期状态码201，但收到200

Question

我想测试正在执行ajax请求的Controller方法

public function testBasicTest()
{  

    $response = $this->withHeaders([
    ])->json('POST', 'http://localhost:8000/cities', ['id' => 1]);

    $response
        ->assertStatus(201)
        ->assertJson([
            'created' => true,
        ]);
}

在此示例中，我遇到此错误：

  

预期的状态码201，但收到200。   无法断言false为真。

当预期状态更改为200时，我收到此错误：

There was 1 failure:

1) Tests\Unit\ExampleTest::testBasicTest
Unable to find JSON:

[{
    "created": true
}]

within response JSON:

[[
    {
        "id": 1,
        "name": "London",
        "created_at": "2018-07-02 12:05:18",
        "updated_at": "2018-07-02 12:05:18"
    },
    {
        "id": 2,
        "name": "Berlin",
        "created_at": "2018-07-02 12:05:18",
        "updated_at": "2018-07-02 12:05:18"
    },
    {
        "id": 3,
        "name": "Paris",
        "created_at": "2018-07-02 12:05:18",
        "updated_at": "2018-07-02 12:05:18"
    },

]].


Failed asserting that an array has the subset Array &0 (
    'created' => true
).
--- Expected
+++ Actual
@@ @@
-    [created] => 1