feat(Managers): add customizable caching for managers (#6013)

test/tester2000.js

@@ -0,0 +1,57 @@
+'use strict';
+
+const { token, prefix, owner } = require('./auth.js');
+const { Client, Options, Intents, Formatters } = require('../src');
+
+// eslint-disable-next-line no-console
+const log = (...args) => console.log(process.uptime().toFixed(3), ...args);
+
+const client = new Client({
+  intents: Intents.ALL,
+  makeCache: Options.cacheWithLimits({
+    MessageManager: 10,
+    PresenceManager: 10,
+  }),
+});
+
+client.on('debug', log);
+client.on('ready', () => {
+  log('READY', client.user.tag, client.user.id);
+});
+client.on('rateLimit', log);
+client.on('error', console.error);
+
+const commands = {
+  eval: message => {
+    if (message.author.id !== owner) return;
+    let res;
+    try {
+      res = eval(message.content);
+      if (typeof res !== 'string') res = require('util').inspect(res);
+    } catch (err) {
+      // eslint-disable-next-line no-console
+      console.error(err.stack);
+      res = err.message;
+    }
+    message.channel.send(Formatters.codeBlock(res));
+  },
+  ping: message => message.channel.send('pong'),
+};
+
+client.on('message', message => {
+  if (!message.content.startsWith(prefix) || message.author.bot) return;
+
+  message.content = message.content.replace(prefix, '').trim().split(' ');
+  const command = message.content.shift();
+  message.content = message.content.join(' ');
+
+  // eslint-disable-next-line no-console
+  console.log('COMMAND', command, message.content);
+
+  if (command in commands) commands[command](message);
+});
+
+client.login(token);
+
+// eslint-disable-next-line no-console
+process.on('unhandledRejection', console.error);