fix: check token expires_in attribute (googleapis#2218)

Author: dmitryuk

src/Client.php

@@ -569,6 +569,10 @@ public function isAccessTokenExpired()
         }
       }
     }
+    if (!isset($this->token['expires_in'])) {
+      // if the token does not have an "expires_in", then it's considered expired
+      return true;
+    }
 
     // If the token is set to expire in the next 30 seconds.
     return ($created + ($this->token['expires_in'] - 30)) < time();

tests/Google/ClientTest.php

@@ -315,6 +315,16 @@ public function testSettersGetters()
     $this->assertEquals($token, $client->getAccessToken());
   }
 
+  public function testSetAccessTokenValidation()
+  {
+      $client = new Client();
+      $client->setAccessToken([
+          'access_token' => 'token',
+          'created' => time()
+      ]);
+      self::assertEquals(true, $client->isAccessTokenExpired());
+  }
+
   public function testDefaultConfigOptions()
   {
       $client = new Client();