asynchronous函数依赖于量angular器testing中的外部模块

我要

1. 保存在远程Web服务器中的图像文件 ，以及
2. 将其上传到另一台服务器

在量angular器testing。

// depend on a external module var fs = require('fs'); // save remote file(url) to local(dest) var download = function (url, dest) { // let this function be async browser.executeAsyncScript(function (url, dest, done) { var file = fs.createWriteStream(dest); var request = http.get(url, function (response) { response.pipe(file); file.on('finish', function () { file.close(done); }); }); }, url, dest); }; describe('', function () { it('', function () { browser.get('http://...'); download('http://.../foo.jpg', 'foo.jpg'); /*** DOESN'T WORK! ***/ var absolutePath = path.resolve(__dirname, 'foo.jpg'); $('input[type=file]').sendKeys(absolutePath); $('#uploadButton').click(); ... 

但是这不起作用：

  Stacktrace: UnknownError: javascript error: fs is not defined 

当我把var fs = require('fs'); 在downloadfunction中，错误信息如下：

  Stacktrace: UnknownError: javascript error: require is not defined 

Answer 1

当你调用executeAsyncScript ，你传递的函数被序列化，并在浏览器中执行。 该函数不会在量angular器testing的上下文中运行，而会在浏览器上运行。

您需要创build一个承诺，解决您完成下载文件。

 // depend on a external module var fs = require('fs'); describe('', function () { // save remote file(url) to local(dest) var download = function (url, dest) { // Create a promise that will be resolved after download. var d = protractor.promise.defer(); var file = fs.createWriteStream(dest); var request = http.get(url, function (response) { response.pipe(file); file.on('finish', function () { file.close(); // The file has been read, resolve the promise d. fulfill(); }); }); // Return the promise d.promise; }; it('', function () { browser.get('http://...'); // Get the file and wait for the promise to resolve to move on download('http://.../foo.jpg', 'foo.jpg').then(function() { // Make sure you specify a path where you can write and read the file. var absolutePath = path.resolve(__dirname, 'foo.jpg'); $('input[type=file]').sendKeys(absolutePath); $('#uploadButton').click(); ... }); 

让我知道如果它的作品

这里是文档： https ： //code.google.com/p/selenium/wiki/WebDriverJs#Deferred_Objects