replace jest with ava

node_modules/ava/lib/worker/ipc.js

@@ -0,0 +1,56 @@
+'use strict';
+const Emittery = require('emittery');
+
+const emitter = new Emittery();
+process.on('message', message => {
+	if (!message.ava) {
+		return;
+	}
+
+	switch (message.ava.type) {
+		case 'options':
+			emitter.emit('options', message.ava.options);
+			break;
+		case 'peer-failed':
+			emitter.emit('peerFailed');
+			break;
+		case 'pong':
+			emitter.emit('pong');
+			break;
+		default:
+			break;
+	}
+});
+
+exports.options = emitter.once('options');
+exports.peerFailed = emitter.once('peerFailed');
+
+function send(evt) {
+	if (process.connected) {
+		process.send({ava: evt});
+	}
+}
+
+exports.send = send;
+
+function unref() {
+	process.channel.unref();
+}
+
+exports.unref = unref;
+
+let pendingPings = Promise.resolve();
+async function flush() {
+	process.channel.ref();
+	const promise = pendingPings.then(async () => { // eslint-disable-line promise/prefer-await-to-then
+		send({type: 'ping'});
+		await emitter.once('pong');
+		if (promise === pendingPings) {
+			unref();
+		}
+	});
+	pendingPings = promise;
+	await promise;
+}
+
+exports.flush = flush;