[Unit Test] messages: getMessages

tests/helpers/messages/getMessages.ts

@@ -0,0 +1,32 @@
+import { Bot } from "../../../src/bot.ts";
+import { assertEquals, assertExists } from "../../deps.ts";
+import { delayUntil } from "../../utils.ts";
+
+export async function getMessagesTest(bot: Bot, channelId: bigint, t: Deno.TestContext) {
+  const message = await bot.helpers.sendMessage(channelId, "Hello World!");
+  const secondMessage = await bot.helpers.sendMessage(channelId, "Hello World 2!");
+  const thirdMessage = await bot.helpers.sendMessage(channelId, "Hello World 3!");
+
+  // Assertions
+  assertExists(message);
+  assertExists(secondMessage);
+  assertExists(thirdMessage);
+  // Delay the execution by to allow MESSAGE_CREATE event to be processed
+  await delayUntil(10000, () => bot.cache.messages.has(message.id) && bot.cache.messages.has(secondMessage.id) && bot.cache.messages.has(thirdMessage.id));
+  // Make sure the messages was created.
+  if (
+      !bot.cache.messages.has(message.id) ||
+      !bot.cache.messages.has(secondMessage.id) ||
+      !bot.cache.messages.has(thirdMessage.id)
+  ) {
+    throw new Error("The message seemed to be sent but it was not cached.");
+  }
+
+  // Fetch the messages
+  const fetchedMessages = await bot.helpers.getMessages(channelId, {
+    after: message.id,
+    limit: 2,
+  });
+  // Check if getMessage has worked
+  assertEquals(fetchedMessages?.length, 2);
+}