Make integration tests independent

This creates a dedicated test suite for integration tests. All of them
can be run independently, and there is no order dependency - previously,
all integration tests needed the installer test to run first, and they
would fail if installation failed.

Now, the developer will have to set up a Flarum database to be used by
these tests. A setup script to make this simple will be added in the
next commit.

Small tradeoff: the installer is NOT tested in our test suite anymore,
only implicitly through the setup script. If we decide that this is a
problem, we can still set up separate, dedicated installer tests which
should probably test the web installer.

tests/integration/RetrievesAuthorizedUsers.php

@@ -11,27 +11,60 @@
 
 namespace Flarum\Tests\integration;
 
-use Flarum\User\User;
-
 trait RetrievesAuthorizedUsers
 {
-    protected $userAttributes = [
-        'username' => 'normal',
-        'password' => 'too-obscure',
-        'email' => 'normal@machine.local'
-    ];
-
-    public function getAdminUser(): User
+    protected function adminGroup(): array
     {
-        return User::find(1);
+        return [
+            'id' => 1,
+            'name_singular' => 'Admin',
+            'name_plural' => 'Admins',
+            'color' => '#B72A2A',
+            'icon' => 'fas fa-wrench',
+        ];
     }
 
-    public function getNormalUser(): User
+    protected function guestGroup(): array
     {
-        return User::unguarded(function () {
-            return User::firstOrCreate([
-                'username' => $this->userAttributes['username']
-            ], $this->userAttributes);
-        });
+        return [
+            'id' => 2,
+            'name_singular' => 'Guest',
+            'name_plural' => 'Guests',
+            'color' => null,
+            'icon' => null,
+        ];
+    }
+
+    protected function memberGroup(): array
+    {
+        return [
+            'id' => 3,
+            'name_singular' => 'Member',
+            'name_plural' => 'Members',
+            'color' => null,
+            'icon' => null,
+        ];
+    }
+
+    protected function adminUser(): array
+    {
+        return [
+            'id' => 1,
+            'username' => 'admin',
+            'password' => '$2y$10$HMOAe.XaQjOimA778VmFue1OCt7tj5j0wk5vfoL/CMSJq2BQlfBV2', // BCrypt hash for "password"
+            'email' => 'admin@machine.local',
+            'is_email_confirmed' => 1,
+        ];
+    }
+
+    protected function normalUser(): array
+    {
+        return [
+            'id' => 2,
+            'username' => 'normal',
+            'password' => '$2y$10$LO59tiT7uggl6Oe23o/O6.utnF6ipngYjvMvaxo1TciKqBttDNKim', // BCrypt hash for "too-obscure"
+            'email' => 'normal@machine.local',
+            'is_email_confirmed' => 1,
+        ];
     }
 }