[11.x] Add assertExactJsonStructure method

[gdebrauwer]

If an API route returns the following response

{
    "data": {
        "id": 1,
        "firstname": "Taylor",
        "lastname": "Otwell"
    }
}

then the following assertion will succeed

$response->assertJsonStructure([
    'data' => [
        'firstname',
        'lastname',
    ],
]);

But what if that API response should not include the "id" key? The assertJsonStructure() method does not allow you to assert that.

That is were this new assertExactJsonStructure() method comes in:

// This fails
$response->assertExactJsonStructure([
    'data' => [
        'firstname',
        'lastname',
    ],
]);

// This succeeds
$response->assertExactJsonStructure([
    'data' => [
        'id',
        'firstname',
        'lastname',
    ],
]);

[github-actions]

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