src/telegram: reset state of global regexp (#326)

References:

  * BR: https://github.com/yagop/node-telegram-bot-api/issues/325
  * BR-by: @Sirius-A
  * PR: https://github.com/yagop/node-telegram-bot-api/pull/326
  * PR-by: @Sirius-A

src/telegram.js

@@ -473,6 +473,8 @@ class TelegramBot extends EventEmitter {
           if (!result) {
             return false;
           }
+          // reset index so we start at the beginning of the regex each time
+          reg.regexp.lastIndex = 0;
           debug('Matches %s', reg.regexp);
           reg.callback(message, result);
           // returning truthy value exits .some

test/telegram.js

@@ -975,6 +975,16 @@ describe('TelegramBot', function telegramSuite() {
         message: { text: '/onText ECHO ALOHA' },
       });
     });
+    it('should reset the global regex state with each message', function test(done) {
+      const regexp = /\/onText (.+)/g;
+      botWebHook.onText(regexp, () => {
+        assert.equal(regexp.lastIndex, 0);
+        return done();
+      });
+      utils.sendWebHookMessage(webHookPort2, TOKEN, {
+        message: { text: '/onText ECHO ALOHA' },
+      });
+    });
   });
 
   describe.skip('#onReplyToMessage', function onReplyToMessageSuite() {});