test(landing): assert a signed-in visitor stays on the landing page

tests/Browser/LandingPageTest.php

@@ -0,0 +1,18 @@
+<?php
+
+use App\Models\User;
+
+use function Pest\Laravel\actingAs;
+
+it('keeps a signed-in visitor on the landing page', function () {
+    actingAs(User::factory()->onboarded()->create());
+
+    $page = visit('/');
+
+    // The wait is the point: a client-side redirect would fire on a timer, so
+    // asserting the path immediately would pass even with one in place.
+    $page->wait(4)
+        ->assertPathIs('/')
+        ->assertSee('Whisper Money')
+        ->assertNoJavascriptErrors();
+});