Fix tests background errors (#403)

Author: MartelliEnrico

src/main/java/com/github/stickerifier/stickerify/bot/Stickerify.java

@@ -41,14 +41,15 @@
 import java.util.List;
 import java.util.Set;
 import java.util.concurrent.Executor;
+import java.util.concurrent.ExecutorService;
 import java.util.concurrent.ThreadFactory;
 
 /**
  * Telegram bot to convert medias in the format required to be used as Telegram stickers.
  *
  * @author Roberto Cella
  */
-public record Stickerify(TelegramBot bot, Executor executor) implements UpdatesListener, ExceptionHandler {
+public record Stickerify(TelegramBot bot, Executor executor) implements UpdatesListener, ExceptionHandler, AutoCloseable {
 
 	private static final Logger LOGGER = LoggerFactory.getLogger(Stickerify.class);
 	private static final String BOT_TOKEN = System.getenv("STICKERIFY_TOKEN");
@@ -91,6 +92,17 @@ public void onException(TelegramException e) {
 		LOGGER.atError().log("There was an unexpected failure: {}", e.getMessage());
 	}
 
+	@Override
+	public void close() {
+		bot.removeGetUpdatesListener();
+
+		if (executor instanceof ExecutorService es) {
+			es.close();
+		}
+
+		bot.shutdown();
+	}
+
 	private void answer(TelegramRequest request) {
 		var file = request.getFile();
 

src/main/java/com/github/stickerifier/stickerify/runner/Main.java

@@ -3,7 +3,21 @@
 import com.github.stickerifier.stickerify.bot.Stickerify;
 
 public class Main {
+	static final Object LOCK = new Object();
+
 	public static void main(String[] args) {
-		new Stickerify();
+		try (var _ = new Stickerify()) {
+			Runtime.getRuntime().addShutdownHook(new Thread(() -> {
+				synchronized (LOCK) {
+					LOCK.notifyAll();
+				}
+			}));
+
+			synchronized (LOCK) {
+				LOCK.wait();
+			}
+		} catch (InterruptedException e) {
+			Thread.currentThread().interrupt();
+		}
 	}
 }

src/test/java/com/github/stickerifier/stickerify/bot/MockResponses.java

@@ -1,13 +1,18 @@
 package com.github.stickerifier.stickerify.bot;
 
+import com.github.stickerifier.stickerify.ResourceHelper;
 import mockwebserver3.MockResponse;
 import okio.Buffer;
 import okio.Okio;
 
-import java.io.File;
-
 public final class MockResponses {
 
+	static final MockResponse EMPTY_UPDATES = new MockResponse.Builder().body("""
+			{
+				ok: true
+			}
+			""").build();
+
 	static final MockResponse START_MESSAGE = new MockResponse.Builder().body("""
 			{
 				ok: true,
@@ -314,7 +319,7 @@ public final class MockResponses {
 			}
 			""").build();
 
-	static MockResponse fileInfo(String id) {
+	static MockResponse fileInfo(String fileName) {
 		return new MockResponse.Builder().body("""
 				{
 					ok: true,
@@ -323,10 +328,11 @@ static MockResponse fileInfo(String id) {
 						file_path: "%1$s"
 					}
 				}
-				""".formatted(id)).build();
+				""".formatted(fileName)).build();
 	}
 
-	static MockResponse fileDownload(File file) throws Exception {
+	static MockResponse fileDownload(String fileName) throws Exception {
+		var file = ResourceHelper.loadResource(fileName);
 		try (var buffer = new Buffer(); var source = Okio.source(file)) {
 			buffer.writeAll(source);
 			return new MockResponse.Builder().body(buffer).build();