Fix endpoint without region (#880)

* Fix endpoint without region

* Fixed tests

* cs fix

Co-authored-by: Nyholm <tobias.nyholm@gmail.com>

Author: jderusse

src/Sts/StsClient.php

@@ -3,7 +3,6 @@
 namespace AsyncAws\Core\Sts;
 
 use AsyncAws\Core\AbstractApi;
-use AsyncAws\Core\Exception\UnsupportedRegion;
 use AsyncAws\Core\RequestContext;
 use AsyncAws\Core\Sts\Input\AssumeRoleRequest;
 use AsyncAws\Core\Sts\Input\AssumeRoleWithWebIdentityRequest;
@@ -107,32 +106,6 @@ protected function getEndpointMetadata(?string $region): array
         }
 
         switch ($region) {
-            case 'af-south-1':
-            case 'ap-east-1':
-            case 'ap-northeast-1':
-            case 'ap-northeast-2':
-            case 'ap-south-1':
-            case 'ap-southeast-1':
-            case 'ap-southeast-2':
-            case 'ca-central-1':
-            case 'eu-central-1':
-            case 'eu-north-1':
-            case 'eu-south-1':
-            case 'eu-west-1':
-            case 'eu-west-2':
-            case 'eu-west-3':
-            case 'me-south-1':
-            case 'sa-east-1':
-            case 'us-east-1':
-            case 'us-east-2':
-            case 'us-west-1':
-            case 'us-west-2':
-                return [
-                    'endpoint' => "https://sts.$region.amazonaws.com",
-                    'signRegion' => $region,
-                    'signService' => 'sts',
-                    'signVersions' => ['v4'],
-                ];
             case 'cn-north-1':
             case 'cn-northwest-1':
                 return [
@@ -207,7 +180,12 @@ protected function getEndpointMetadata(?string $region): array
                 ];
         }
 
-        throw new UnsupportedRegion(sprintf('The region "%s" is not supported by "Sts".', $region));
+        return [
+            'endpoint' => "https://sts.$region.amazonaws.com",
+            'signRegion' => $region,
+            'signService' => 'sts',
+            'signVersions' => ['v4'],
+        ];
     }
 
     protected function getServiceCode(): string

tests/Integration/StsClientTest.php

@@ -3,7 +3,6 @@
 namespace AsyncAws\Core\Tests\Integration;
 
 use AsyncAws\Core\Credentials\NullProvider;
-use AsyncAws\Core\Exception\UnsupportedRegion;
 use AsyncAws\Core\Sts\Input\AssumeRoleRequest;
 use AsyncAws\Core\Sts\Input\AssumeRoleWithWebIdentityRequest;
 use AsyncAws\Core\Sts\Input\GetCallerIdentityRequest;
@@ -96,14 +95,16 @@ public function testNonAwsRegionWithCustomEndpoint(): void
         self::assertNotEmpty($client->presign(new AssumeRoleRequest(['RoleArn' => 'demo', 'RoleSessionName' => 'demo'])));
     }
 
+    /**
+     * A region that is not recognized should be treated as "default" region.
+     */
     public function testNonAwsRegion(): void
     {
         $client = new StsClient([
             'region' => 'test',
         ], new NullProvider());
 
-        $this->expectException(UnsupportedRegion::class);
-        $client->presign(new AssumeRoleRequest(['RoleArn' => 'demo', 'RoleSessionName' => 'demo']));
+        self::assertNotEmpty($client->presign(new AssumeRoleRequest(['RoleArn' => 'demo', 'RoleSessionName' => 'demo'])));
     }
 
     public function testCustomEndpointSignature(): void