Laravel/PHPUnit: Assert json element exists without defining the value

Question

I'm sending a post request in a test case, and I want to assert that a specific element. Let's say I have a key x which exists in the response. In this case, I can't say seeJson(['x' => whatever]); because the value is unknown. For sure, I can't do it with seeJson(['x']);.

Is there a way to solve this?

If it matters:

Laravel: v5.2.31

PHPUnit: 5.3.4

Answer 1

Although it's not optimal at all, I chose to use this code to test the situation:

$this->post(URL, PARAMS)->see('x');

X is a hypothetical name, and the actual element key has a slim chance of popping up in the rest of the data. otherwise this nasty workaround wouldn't be practical.

UPDATE:

Here's the solution to do it properly:

public function testCaseName()

{
    $this->post(route('route.name'), [
        'param1' => 1,
        'param2' => 10,
    ], [
        'headers_if_any' => 'value'
    ]);

    $res_array = (array)json_decode($this->response->content());

    $this->assertArrayHasKey('x', $res_array);
}