Assert a file does not exist (node)

assert-file-exists.ts

import * as fs from 'fs';
import * as assert from 'assert';
import * as _ from 'lodash';

function assertFileExists(filePath:string, msg?:string) {
	try {
		fs.statSync(filePath);
	}
	catch (err) {
		if (_.includes(['ENOENT', 'ENOTDIR'], err.code)) {
			return assert.fail(undefined, filePath, msg || `File does not exist at path ${filePath}`, 'exists');
		}
		assert.ifError(err);
	}
}
export default assertFileExists;

assert-file-not-exists

const fs = require('fs');
const assert = require('assert');
const _ = require('lodash');

module.exports = function assertFileNotExists(filePath, msg) {
	try {
		fs.statSync(filePath);
	}
	catch (err) {
		if (!_.includes(['ENOENT', 'ENOTDIR'], err.code)) {
			assert.ifError(err);
		}
		return;
	}

	assert(false, msg);
}

assert-file-not-exists.ts

import * as fs from 'fs';
import * as assert from 'assert';
import * as _ from 'lodash';

function assertFileNotExists(filePath:string, msg?:string) {
	try {
		fs.statSync(filePath);
	}
	catch (err) {
		if (!_.includes(['ENOENT', 'ENOTDIR'], err.code)) {
			assert.ifError(err);
		}
		return;
	}
	assert(false, `${msg}: (file exists)`);
}
export default assertFileNotExists;