Fix tests

Author: pengrad

library/src/main/java/com/pengrad/telegrambot/AttachName.java

@@ -16,4 +16,8 @@ public static String next() {
         return "attach" + counter.incrementAndGet();
     }
 
+    public static void reset() {
+        counter.set(0);
+    }
+
 }

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

@@ -12,6 +12,7 @@ public class AttachNameTest {
 
     @Test
     public void next() {
+        AttachName.reset();
         assertEquals("attach1", AttachName.next());
         assertEquals("attach2", AttachName.next());
         assertEquals("attach3", AttachName.next());

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

@@ -1967,4 +1967,16 @@ public void chatJoinRequest() {
         assertFalse(response.isOk());
         assertEquals("Bad Request: USER_ALREADY_PARTICIPANT", response.description());
     }
+
+    @Test
+    public void banChatSenderChat() {
+        BaseResponse response = bot.execute(new BanChatSenderChat(channelName, memberBot).untilDate(123));
+        assertTrue(response.isOk());
+    }
+
+    @Test
+    public void unbanChatSenderChat() {
+        BaseResponse response = bot.execute(new UnbanChatSenderChat(channelName, memberBot));
+        assertTrue(response.isOk());
+    }
 }