Testing lazy props

[captenmasin]

Using the new test helpers

$this->get('/')->assertInertia(function (Assert $inertia) {
        $inertia->component('Dashboard')->has('user');
    });

How would one assert that a prop exists when it's loaded via Inertia::lazy() ?

[reinink]

Hey @claudiodekker, I know we've been asked about this before. Do we have a good solution for this yet? 🤔

[claudiodekker]

Not yet! I think we'll have to end up making a custom Trait that allows you to do things like that.
Then you'd just use that in your TestCase & use something like inertia()->get() / inertiaGet() or something.

[jackkitley]

still nothing on this?

[JeroenGovers]

I ran into the same problem. So I created a pull request #595

[lukasleitsch]

This way works for me:

$this
    ->withHeaders([
        'X-Inertia-Partial-Component' => 'Home/Home',
        'X-Inertia-Partial-Data' => 'users',
    ])
    ->get('/')
    ->assertOK()
    ->assertInertia(fn(AssertableInertia $page) => $page
        ->has('users')
        ->etc()
    );

Credits: https://twitter.com/djgeisi/status/1637803207324778498

[Barbapapazes]

While this is a great solution, this requires us to know how inertia works under the hood. They could expose the headers through constants to make it easier (and maybe explain them in the documentation).

[PerryRylance]

Just arrived here looking for how to test lazy props - would be great if we could have withLazyProps, withOnly or something