Fix object instantiation and add getUpdate functionality

tests/TgBotLib/Methods/GetUpdatesTest.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace TgBotLib\Methods;
+
+use PHPUnit\Framework\TestCase;
+use TgBotLib\Bot;
+use TgBotLib\Enums\Types\ParseMode;
+use TgBotLib\Objects\LinkPreviewOptions;
+use TgBotLib\Objects\Message;
+use TgBotLib\Objects\MessageId;
+use TgBotLib\Objects\Update;
+
+class GetUpdatesTest extends TestCase
+{
+    private static Bot $bot;
+
+    /**
+     * @return void
+     */
+    public static function setUpBeforeClass(): void
+    {
+        self::$bot = new Bot(BOT_TOKEN);
+        self::$bot->setAutoRetry(true);
+    }
+
+    /**
+     * Tests the `sendMessage` function of the bot instance.
+     *
+     * @return void
+     */
+    public function testGetUpdatesTest(): void
+    {
+        $result = self::$bot->getUpdates();
+
+        if(count($result) > 0)
+        {
+            $this->assertInstanceOf(Update::class, $result[0]);
+        }
+
+        $this->assertIsArray($result);
+    }
+}