Add integration test for API root endpoint

tests/integration/api/forum/ShowTest.php

@@ -0,0 +1,82 @@
+<?php
+
+/*
+ * This file is part of Flarum.
+ *
+ * For detailed copyright and license information, please view the
+ * LICENSE file that was distributed with this source code.
+ */
+
+namespace Flarum\Tests\integration\api\forum;
+
+use Flarum\Tests\integration\RetrievesAuthorizedUsers;
+use Flarum\Tests\integration\TestCase;
+use Illuminate\Support\Arr;
+
+class ShowTest extends TestCase
+{
+    use RetrievesAuthorizedUsers;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->prepareDatabase([
+            'users' => [
+                $this->adminUser(),
+                $this->normalUser(),
+            ],
+            'groups' => [
+                $this->adminGroup(),
+                $this->memberGroup(),
+            ],
+            'group_user' => [
+                ['user_id' => 1, 'group_id' => 1],
+                ['user_id' => 2, 'group_id' => 3],
+            ],
+        ]);
+    }
+
+    /**
+     * @test
+     */
+    public function normal_user_sees_most_information()
+    {
+        $response = $this->send(
+            $this->request('GET', '/api', [
+                'authenticatedAs' => 2,
+            ])
+        );
+
+        $this->assertEquals(200, $response->getStatusCode());
+
+        $json = json_decode($response->getBody()->getContents(), true);
+
+        $this->assertEquals(true, Arr::get($json, 'data.attributes.debug'));
+        $this->assertEquals('http://localhost', Arr::get($json, 'data.attributes.baseUrl'));
+        $this->assertEquals('http://localhost/api', Arr::get($json, 'data.attributes.apiUrl'));
+
+        $this->assertArrayNotHasKey('adminUrl', Arr::get($json, 'data.attributes'));
+    }
+
+    /**
+     * @test
+     */
+    public function admin_user_sees_even_more()
+    {
+        $response = $this->send(
+            $this->request('GET', '/api', [
+                'authenticatedAs' => 1,
+            ])
+        );
+
+        $this->assertEquals(200, $response->getStatusCode());
+
+        $json = json_decode($response->getBody()->getContents(), true);
+
+        $this->assertEquals(true, Arr::get($json, 'data.attributes.debug'));
+        $this->assertEquals('http://localhost', Arr::get($json, 'data.attributes.baseUrl'));
+        $this->assertEquals('http://localhost/api', Arr::get($json, 'data.attributes.apiUrl'));
+        $this->assertEquals('http://localhost/admin', Arr::get($json, 'data.attributes.adminUrl'));
+    }
+}