Admin topnav: only allow one details group open via JS

tests/Feature/AdminTopNavSingleOpenDetailsTest.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminTopNavSingleOpenDetailsTest extends TestCase
+{
+    use RefreshDatabase;
+
+    protected function loginAsPlatformAdmin(): void
+    {
+        $this->seed();
+
+        $this->post('/admin/login', [
+            'email' => 'platform.admin@demo.local',
+            'password' => 'Platform@123456',
+        ])->assertRedirect('/admin');
+    }
+
+    public function test_layout_should_include_single_open_nav_script(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $this->get('/admin')
+            ->assertOk()
+            ->assertSee('data-role="topnav-group"', false)
+            ->assertSee('data-role="topnav-groups-root"', false)
+            ->assertSee('data-action="topnav-single-open"', false);
+    }
+}