update test to mjs

tests/messageformatter.mjs

@@ -0,0 +1,28 @@
+import chalk from 'chalk';
+
+const describe = (jsHandle) => jsHandle.evaluate(
+	// serialize |obj| however you want
+	(obj) => `OBJ: ${typeof obj}, ${obj}`,
+	jsHandle,
+);
+
+const colors = {
+	LOG: chalk.grey,
+	ERR: chalk.red,
+	WAR: chalk.yellow,
+	INF: chalk.cyan,
+};
+
+const formatter = async (message) => {
+	const args = await Promise.all(message.args().map((arg) => describe(arg)));
+	// make ability to paint different console[types]
+	const type = message.type().substr(0, 3).toUpperCase();
+	const color = colors[type] || chalk.blue;
+	let text = '';
+	for (let i = 0; i < args.length; i += 1) {
+		text += `[${i}] ${args[i]} `;
+	}
+	console.log(color(`CONSOLE.${type}: ${message.text()}\n${text} `));
+};
+
+export default formatter;