Fix tests

Author: pengrad

library/src/test/java/com/pengrad/telegrambot/TelegramBotTest.java

@@ -647,6 +647,12 @@ public void sendMessageToChannel() {
         MessageTest.checkTextMessage(message);
         assertEquals(url, message.entities()[0].url());
         assertEquals(channelId, message.senderChat().id());
+        LinkPreviewOptions linkPreviewOptions = message.linkPreviewOptions();
+        assertTrue(linkPreviewOptions.isDisabled());
+        assertNull(linkPreviewOptions.url());
+        assertNull(linkPreviewOptions.preferSmallMedia());
+        assertNull(linkPreviewOptions.preferLargeMedia());
+        assertNull(linkPreviewOptions.showAboveText());
     }
 
     @Test

library/src/test/java/com/pengrad/telegrambot/checks/MessageTest.java

@@ -46,7 +46,6 @@ public static void checkTextMessage(Message message) {
         assertFalse(message.isFromOffline());
         assertFalse(message.hasMediaSpoiler());
         assertNull(message.showCaptionAboveMedia());
-        assertNull(message.linkPreviewOptions());
         assertNull(message.effectId());
         assertNull(message.messageAutoDeleteTimerChanged());
         assertNull(message.refundedPayment());