我需要根據(jù)預期結(jié)果檢查下載文件的內(nèi)容（本例中為CSV導出），并發(fā)現(xiàn)以下內(nèi)容可以正常工作：

var filename = '/tmp/export.csv';

var fs = require('fs');

if (fs.existsSync(filename)) {

    // Make sure the browser doesn't have to rename the download.

    fs.unlinkSync(filename);

}

$('a.download').click();

browser.driver.wait(function() {

    // Wait until the file has been downloaded.

    // We need to wait thus as otherwise protractor has a nasty habit of

    // trying to do any following tests while the file is still being

    // downloaded and hasn't been moved to its final location.

    return fs.existsSync(filename);

}, 30000).then(function() {

    // Do whatever checks you need here.  This is a simple comparison;

    // for a larger file you might want to do calculate the file's MD5

    // hash and see if it matches what you expect.

    expect(fs.readFileSync(filename, { encoding: 'utf8' })).toEqual(

        "A,B,C\r\n"

    );

});

我發(fā)現(xiàn)Leo的配置建議有助于將下載文件保存在可訪問的位置。

30000毫秒的超時是默認值，因此可以省略，但是我提醒您，以防萬一有人要更改它。