feat: getChannel test Closes #1235

tests/channels/getChannel.ts

@@ -0,0 +1,13 @@
+import { assertEquals } from "../deps.ts";
+import { bot, guild } from "../mod.ts";
+
+Deno.test("[channel] Get a channel", async () => {
+  const channel = await bot.helpers.createChannel(guild.id, {
+    name: "fetching",
+  });
+
+  const fetched = await bot.helpers.getChannel(channel.id);
+
+  assertEquals(channel.id, fetched.id);
+  assertEquals(channel.name, fetched.name);
+});