it('should have right fesm files', () => {
   const expected = [
     'example.js',
     'example.js.map',
     'secondary.js',
     'secondary.js.map',
   ];
   expect(shx.ls('-R', 'esm5').stdout.split('\n').filter(n => !!n).sort()).toEqual(expected);
   expect(shx.ls('-R', 'esm2015').stdout.split('\n').filter(n => !!n).sort()).toEqual(expected);
 });

 it('should have right fesm files', () => {
   const expected = [
     'common.js',
     'common.js.map',
     'http',
     'http.js',
     'http.js.map',
     'http/testing.js',
     'http/testing.js.map',
     'testing.js',
     'testing.js.map',
   ];
   expect(shx.ls('-R', 'fesm5').stdout.split('\n').filter(n => !!n).sort()).toEqual(expected);
   expect(shx.ls('-R', 'fesm2015').stdout.split('\n').filter(n => !!n).sort()).toEqual(expected);
 });

let writeFile = function (filename, dir, match: string[], prefix = '$') {
    let res = shell.ls(dir);
    for (let str of match) {
        fs.writeFileSync(path.join(dir, `${str}_${filename}`), refFiles(res, str, prefix));
    }
    
}

 it('should generate valid samples .js that keeps the jsdoc top comment', () => {
     ls('spec/assets/*Sample.ts').forEach((file) => {
         let js = cat(file.replace('.ts', '.js'))
         expect(js).toContain(' * @NApiVersion 2')
         try {
             parseScript(js)
         } catch (ex) {
             fail('invalid javascript generated')
             console.log(ex, ex.stack)
         }
     })
 })

 () => { expect(shx.ls('bundles/core-testing.umd.js').length).toBe(1, 'File not found'); });

then(() => shell.ls('-l', inputDir) as any as Promise<(fs.Stats & {name: string})[]>).