Added the new method setChatAdministratorCustomTitle to manage the custom titles of administrators promoted by the bot

Author: pengrad

library/src/main/java/com/pengrad/telegrambot/request/SetChatAdministratorCustomTitle.java

@@ -0,0 +1,15 @@
+package com.pengrad.telegrambot.request;
+
+import com.pengrad.telegrambot.response.BaseResponse;
+
+/**
+ * Stas Parshin
+ * 01 January 2020
+ */
+public class SetChatAdministratorCustomTitle extends BaseRequest<SetChatAdministratorCustomTitle, BaseResponse> {
+
+    public SetChatAdministratorCustomTitle(Object chatId, int userId, String customTitle) {
+        super(BaseResponse.class);
+        add("chat_id", chatId).add("user_id", userId).add("custom_title", customTitle);
+    }
+}

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

@@ -1054,6 +1054,20 @@ private PreCheckoutQuery getLastPreCheckoutQuery() {
         return null;
     }
 
+    @Test
+    public void setChatAdministratorCustomTitle() {
+        BaseResponse response = bot.execute(new PromoteChatMember(groupId, memberBot).canPromoteMembers(true));
+        assertTrue(response.isOk());
+
+        String customTitle = "aqi " + new Random().nextInt(999999);
+        response = bot.execute(new SetChatAdministratorCustomTitle(groupId, memberBot, customTitle));
+        assertTrue(response.isOk());
+
+        ChatMember member = bot.execute(new GetChatMember(groupId, memberBot)).chatMember();
+        ChatMemberTest.check(member);
+        assertEquals(customTitle, member.customTitle());
+    }
+
     @Test
     public void setChatPermissions() throws InterruptedException {
         for (boolean bool : new boolean[]{true, false}) {