Pass Messaging API errors to NotFound exceptions

CHANGELOG.md

@@ -1,6 +1,10 @@
 # CHANGELOG
 
 ## [Unreleased]
+### Fixed
+* When trying to work with unknown FCM tokens, errors returned from the Messaging REST API were not passed to the
+  `NotFound` exception, which prevented the inspection of further details.
+  (backported from [#760](https://github.com/kreait/firebase-php/pull/760))
 
 ## [5.26.3]
 ### Fixed

src/Firebase/Messaging.php

@@ -55,7 +55,7 @@ public function send($message, bool $validateOnly = false): array
         } catch (NotFound $e) {
             $token = $message->jsonSerialize()['token'] ?? null;
             if ($token) {
-                throw NotFound::becauseTokenNotFound($token);
+                throw NotFound::becauseTokenNotFound($token, $e->errors());
             }
 
             throw $e;
@@ -185,7 +185,7 @@ public function getAppInstance($registrationToken): AppInstance
         try {
             return $this->appInstanceApi->getAppInstanceAsync($token)->wait();
         } catch (NotFound $e) {
-            throw NotFound::becauseTokenNotFound($token->value());
+            throw NotFound::becauseTokenNotFound($token->value(), $e->errors());
         } catch (MessagingException $e) {
             // The token is invalid
             throw new InvalidArgument("The registration token '{$token}' is invalid or not available", $e->getCode(), $e);

tests/Integration/MessagingTest.php

@@ -357,12 +357,26 @@ public function testGetAppInstanceWithInvalidToken(): void
     public function testSendMessageToUnknownToken(): void
     {
         $this->expectException(NotFound::class);
-        $this->messaging->send(['token' => self::$unknownToken]);
+
+        try {
+            $this->messaging->send(['token' => self::$unknownToken]);
+        } catch (NotFound $e) {
+            $this->assertNotEmpty($e->errors());
+
+            throw $e;
+        }
     }
 
     public function testGetAppInstanceForUnknownToken(): void
     {
         $this->expectException(NotFound::class);
-        $this->messaging->getAppInstance(self::$unknownToken);
+
+        try {
+            $this->messaging->getAppInstance(self::$unknownToken);
+        } catch (NotFound $e) {
+            $this->assertNotEmpty($e->errors());
+
+            throw $e;
+        }
     }
 }