Protractor e2e test case for downloading csv file without prompt - angularjs

Question

Protractor e2e test case for downloading csv file without prompt is not working with the following code. Please help me on this. I have gone through all the stuff already available in stackoverflow. Nothing worked for me...
var q = require("q");
var FirefoxProfile = require("firefox-profile");
var makeFirefoxProfile = function(preferenceMap, specs) {
var deferred = q.defer();
var firefoxProfile = new FirefoxProfile();
for (var key in preferenceMap) {
firefoxProfile.setPreference(key, preferenceMap[key]);
}
firefoxProfile.encoded(function (encodedProfile) {
var capabilities = {
browserName: "firefox",
acceptInsecureCerts: true,
"moz:webdriverClick": false,
firefox_profile: encodedProfile,
};
deferred.resolve(capabilities);
});
return deferred.promise;
};
exports.config = {
getMultiCapabilities: function() {
return q.all([
makeFirefoxProfile(
{
"browser.download.dir": "./",
"browser.helperApps.neverAsk.saveToDisk": "text/commaseparated-values, text/csv, application/csv, application/excel, application/vnd.ms-excel, application/vnd.msexcel, text/anytext"
},
)
]);
},
// NOTE: this will need changing if a new version of selenium
// standalone server is released --->
seleniumServerJar: 'node_modules/protractor/node_modules/webdriver-manager/selenium/selenium-server-standalone-3.5.0.jar',
specs: [
'test/e2e/app.e2e_spec.js',
'test/e2e/**/*.e2e_spec.js',
],
capabilities: {
browserName: 'firefox',
acceptInsecureCerts: true,
firefox_profile: makeFirefoxProfile,
"moz:webdriverClick": false
},
jasmineNodeOpts: {
defaultTimeoutInterval: 240000
},
baseUrl: 'https://localhost:3030/',
seleniumAddress: 'http://localhost:4444/wd/hub',
framework: 'jasmine'
};
With the above is my protractor.conf file not working, Prompt pop-up is coming for file download.
Do you have any ideas? Thanks.