import events from 'events';
import test from 'ava';
import td from 'testdouble';

const chokidarStub = {};

td.replace('chokidar', chokidarStub);
const Fn = require('./watcher');

function setup(stubs = {}) {
	chokidarStub.watch = stubs.watch || (() => new events.EventEmitter());
	return new Fn({source: '.'});
}

test('should emit "sync" if file was added/changed/deleted', t => {
	t.plan(3);
	const fn = setup();
	fn.start();
	fn.getEventEmitter().on('sync', () => t.pass('file change detected'));
	fn.watcher.emit('add', 'file.txt');
	fn.watcher.emit('change', 'file.txt');
	fn.watcher.emit('unlink', 'file.txt');
});

test('should emit "install" if "package.json" or "yarn.lock" was added/changed/deleted', t => {
	t.plan(6);
	const fn = setup();
	fn.start();
	fn.getEventEmitter().on('install', () => t.pass('file change detected'));
	fn.watcher.emit('add', 'package.json');
	fn.watcher.emit('change', 'package.json');
	fn.watcher.emit('unlink', 'package.json');
	fn.watcher.emit('add', 'yarn.lock');
	fn.watcher.emit('change', 'yarn.lock');
	fn.watcher.emit('unlink', 'yarn.lock');
});

test('should emit "sync" if "package.json" or "yarn.lock" was added/changed/deleted', t => {
	t.plan(6);
	const fn = setup();
	fn.start();
	fn.getEventEmitter().on('sync', () => t.pass('file change detected'));
	fn.watcher.emit('add', 'package.json');
	fn.watcher.emit('change', 'package.json');
	fn.watcher.emit('unlink', 'package.json');
	fn.watcher.emit('add', 'yarn.lock');
	fn.watcher.emit('change', 'yarn.lock');
	fn.watcher.emit('unlink', 'yarn.lock');
});