gulp xunit cover

file.js

gulp.task('test', "Run all the tests", ["build", "tools:download:xunit-runner"], function() {
  console.log(config.tools.xunit.path)
  var options = {
    executable: config.tools.xunit.path,
    options: {
      nologo: true,
      xml: config.testResult
    }
  }
  var assemblies = [`../**/bin/${config.buildConfiguration}/*.Test.dll`]
  
  return gulp.src(assemblies, {read: true}).pipe(xunit(options));
})


// Possibile approccio

gulp.task('cover', "Run test code coverage and outputs an html report", [], () => {
  
  var through = require('through2');
  
  var assemblies = [`../**/bin/${config.buildConfiguration}/*.Test.dll`]

  var fileList = []
  gulp.src(assemblies)
    .pipe(through.obj(function (file, enc, cb) {
      fileList.push(file.path);
      cb(null);
    }))
    .pipe(gulp.dest('./temp/'))
      .on ('end', function () {
        console.log(fileList);
      });
})


//altro approccio

 gulp.task('cover', "Run test code coverage and outputs an html report", [], () => {
  
  var through = require('through2');
  
  var assemblies = [`../**/bin/${config.buildConfiguration}/*.Test.dll`]

  gulp.src(assemblies)
    .pipe(concatNames())
    .on('data', names => {
        console.log(names)
    })
      
  function concatNames() {
    var names = []
    function bufferContents(file, enc, cb) {
      names.push(file.path)
      cb(null)
    }
    function endStream() {
      this.emit('data', names.join(' '));
      this.emit('end');
    }
    return through.obj(bufferContents, endStream);
  }     
})