Laravel 5.8 | Test JSON response like assertJsonMessage?

I want to test the json test response contain different values, in this case error messages, like so:

    public function testFieldsAreRequired()
    {
        $this->postJson('/posts', [])
            ->assertStatus(422)
            ->assertJsonValidationErrors([
                'name',
                'email',
                'date_of_birth',
            ])
            ->assertJsonFragment([
                'The name field is required.'
            ])
            ->assertJsonFragment([
                'The email field is required.'
            ])
            ->assertJsonFragment([
                'The date of birth field is required.'
            ]);
    }

This approach is not very efficient. I'm looking for an approach, like so:

    .....
    ->assertJsonMessage([
        'The name field is required.',
        'The email field is required.',
        'The date of birth field is required',
    ]);

Like above, I don't need to specify keys and different values.

But assertJsonMessage is a protected method, so I'm not sure about original design and using this approach.

H

via Chebli Mohamed