Certified/tests/Feature/LocaleTest.php

<?php

use App\Models\User;

test('a guest can switch the language and it is kept in the session', function () {
    $response = $this->get('/language/nl');

    $response->assertRedirect();
    expect(session('locale'))->toBe('nl');
});

test('switching to an unsupported locale is rejected', function () {
    $this->get('/language/de')->assertNotFound();

    expect(session('locale'))->toBeNull();
});

test('switching the language persists it on the authenticated user', function () {
    $user = User::factory()->create(['locale' => 'en']);
    $this->actingAs($user);

    $this->get('/language/nl')->assertRedirect();

    expect($user->refresh()->locale)->toBe('nl');
});

test("a guest's session locale is applied to the rendered page", function () {
    $this->withSession(['locale' => 'nl']);

    $this->get(route('login'))
        ->assertOk()
        ->assertSee('Inloggen')
        ->assertSee('Wachtwoord vergeten');
});

test("an authenticated user's saved locale is applied even without a session value", function () {
    $user = User::factory()->create(['locale' => 'nl']);
    $this->actingAs($user);

    $this->get(route('dashboard'))
        ->assertOk()
        ->assertSee('Certificaten');
});

test('the default locale is english', function () {
    $this->get(route('login'))
        ->assertOk()
        ->assertSee('Log in')
        ->assertDontSee('Inloggen');
});