Resolve GuzzleHttp\Exception\RequestException error

composer.json

@@ -11,7 +11,7 @@
         "absszero/laravel-stackdriver-error-reporting": "^1.9",
         "firebase/php-jwt": "^7.0",
         "google/recaptcha": "^1.2",
-        "guzzlehttp/guzzle": "^7.8",
+        "guzzlehttp/guzzle": "^7.12",
         "guzzlehttp/psr7": "^2.9",
         "hackzilla/password-generator": "^1.6",
         "intervention/image": "^2.5",

tests/Services/MediaWikiHostResolverTest.php

@@ -8,7 +8,10 @@
 use App\Wiki;
 use App\WikiDb;
 use Faker\Factory;
+use GuzzleHttp\Client;
+use GuzzleHttp\Exception\RequestException;
 use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Support\Facades\Http;
 
 class MediaWikiHostResolverTest extends TestCase {
     use RefreshDatabase;
@@ -23,6 +26,16 @@ public function testResolverRoutesToCorrectHost(): void {
         );
     }
 
+    public function testResolverBuildsBackendUrl(): void {
+        $domain = (new Factory())->create()->unique()->text(30);
+        $this->createWiki($domain, 'mw1.43-wbs2');
+        $resolver = new MediaWikiHostResolver();
+        $this->assertEquals(
+            'http://mediawiki-143-app-backend.default.svc.cluster.local',
+            $resolver->getBackendHostForDomain($domain)
+        );
+    }
+
     private function createWiki(string $domain, string $version) {
         $wiki = Wiki::factory()->create(['domain' => $domain]);
         WikiDb::create([
@@ -53,4 +66,25 @@ public function testResolverThrowsIfUnableToFindWiki(): void {
             UnknownWikiDomainException::class
         );
     }
+
+    public function testGuzzleRejectsSchemelesUrls(): void {
+        $client = new Client();
+
+        // This should throw RequestException about empty scheme
+        $this->assertThrows(
+            fn () => $client->get('mediawiki-143-app-backend.default.svc.cluster.local/w/api.php'),
+            RequestException::class,
+            'scheme "" is not allowed'
+        );
+    }
+
+    public function testGuzzleAcceptsSchemeUrls(): void {
+        Http::fake(['*' => Http::response()]);
+
+        $client = new Client();
+        // This should NOT throw
+        $response = $client->get('http://mediawiki-143-app-backend.default.svc.cluster.local/w/api.php');
+
+        $this->assertTrue($response->getStatusCode() === 200);
+    }
 }