Download Files Using LambdaTest Selenium Grid
While you perform Selenium test automation, you may want to test the download functionality of your web-application or website. With LambdaTest Selenium Grid, you can test the download feature of your web-application on 2000+ real browsers for mobile and desktop. You can download a file inside the test machine through your Selenium test automation script by Base64 encryption & decryption.
LambdaTest Selenium Grid will provide you with an encoded string of base64 which you can leverage to download any file inside the virtual machine triggered through your Selenium testing scripts. For this, LambdaTest has provided three main flags using JavascriptExecutor to:
- Check whether the downloaded file exists in the test machine.
((JavascriptExecutor) driver).executeScript("lambda-file-exists=file-name.file_format");- Retrieve file metadata such as md5 code, modified time, name and size
((JavascriptExecutor) driver).executeScript("lambda-file-stats=file-name.file_format");- Download file content using base64 encoding
((JavascriptExecutor) driver).executeScript("lambda-file-content=file-name.file_format");- Lambda File List Custom Executor
print driver.execute_script("lambda-file-list={match string with filename}");ie:. print driver.execute_script("lambda-file-list=sample");Response: List of files in downloads dir starting with sampleNote: Don’t forget to feed the file format with the file name to the JavaScriptExecutor.
Downloading File Using Selenium With Java#
import java.io.FileOutputStream;import java.io.OutputStream;import java.net.MalformedURLException;import java.net.URL;import java.util.Base64;import java.util.concurrent.TimeUnit;import org.openqa.selenium.By;import org.openqa.selenium.JavascriptExecutor;import org.openqa.selenium.NoSuchElementException;import org.openqa.selenium.WebElement;import org.openqa.selenium.firefox.FirefoxOptions;import org.openqa.selenium.remote.DesiredCapabilities;import org.openqa.selenium.remote.RemoteWebDriver;import org.openqa.selenium.remote.SessionId;import org.testng.Assert;import org.testng.annotations.AfterTest;import org.testng.annotations.BeforeTest;import org.testng.annotations.Test; public class DownloadCheck { public String username = "user_name"; public String accesskey = "access_Key"; public RemoteWebDriver driver; public String gridURL = "@hub.lambdatest.com/wd/hub"; String status = "passed"; @BeforeTest public void setUp() throws Exception { FirefoxOptions options = new FirefoxOptions(); options.addPreference("browser.download.folderList", 2); options.addPreference("browser.download.dir", "D:\\Downloads"); options.addPreference("browser.download.useDownloadDir", true); options.addPreference("browser.helperApps.neverAsk.saveToDisk", "image/jpeg"); DesiredCapabilities capabilities = new DesiredCapabilities(); capabilities.setCapability("browserName", "firefox"); capabilities.setCapability("version", "65"); capabilities.setCapability("platform", "WIN10"); capabilities.setCapability("build","Download functionality test"); capabilities.setCapability("name", "sample test"); capabilities.setCapability("network", true); // To enable network logs capabilities.setCapability("visual", true); capabilities.setCapability("video", true); // To enable video recording` capabilities.setCapability("console", true); // To capture console logs capabilities.setCapability("selenium_version","3.4.0"); capabilities.merge(options); try { driver = new RemoteWebDriver(new URL("https://" + username + ":" + accesskey + gridURL), capabilities); } catch (MalformedURLException e) { System.out.println("Invalid grid URL"); } catch (Exception e) { System.out.println(e.getMessage()); } } @Test() public void fileDownload() throws Exception { try { driver.get("https://www.w3schools.com/tags/tryit.asp?filename=tryhtml5_a_download"); driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS); driver.switchTo().frame("iframeResult"); WebElement element = driver.findElement(By.xpath("//a[@href='/images/myw3schoolsimage.jpg']")); element.click(); Thread.sleep(4000); Assert.assertEquals(((JavascriptExecutor) driver).executeScript("lambda-file-exists=myw3schoolsimage.jpg"), true); //file exist check System.out.println(((JavascriptExecutor) driver).executeScript("lambda-file-stats=myw3schoolsimage.jpg")); //retrieve file stats String base64EncodedFile = ((JavascriptExecutor) driver).executeScript("lambda-file-content=myw3schoolsimage.jpg").toString(); // file content download System.out.println(base64EncodedFile); byte[] data = Base64.getDecoder().decode(base64EncodedFile); OutputStream stream = new FileOutputStream("myw3cImage.jpg"); stream.write(data); } catch (NoSuchElementException e) { System.out.println(e.getMessage()); SessionId id = driver.getSessionId(); System.out.println("Failed test session id: " + id.toString()); } } @AfterTest public void tearDown() throws Exception { if (driver != null) { ((JavascriptExecutor) driver).executeScript("lambda-status=" + status); driver.quit(); } }}Downloading File Using Selenium With Python#
import unittestimport timeimport base64from selenium import webdriverfrom selenium.webdriver.common.keys import Keys
class LTAutomate(unittest.TestCase): def setUp(self): # username: Username can be found at automation dashboard username="user_name" # accessToken: AccessToken can be genarated from automation dashboard or profile section accessToken="access_Key"
# gridUrl: gridUrl can be found at automation dashboard gridUrl = "hub.lambdatest.com/wd/hub" desired_cap = { 'platform' : "win10", 'browserName' : "chrome", 'version' : "79.0", # Resolution of machine "resolution": "1024x768", "name": "sample test", "build": "Download functionality test", "selenium_version" : "3.4.0", "network": True, "video": True, "visual": True, "console": True, }
# URL: https://{username}:{accessToken}@beta-hub.lambdatest.com/wd/hub url = "https://"+username+":"+accessToken+"@"+gridUrl print("Initiating remote driver on platfrom: "+desired_cap["platform"]+" browser: "+desired_cap["browserName"]+" version: "+desired_cap["version"]) self.driver = webdriver.Remote( desired_capabilities=desired_cap, command_executor= url )
def test_download(self): driver = self.driver print("Driver initiated sucessfully. Navigate url") driver.get("https://www.w3schools.com/tags/tryit.asp?filename=tryhtml5_a_download")
time.sleep(5) driver.switch_to.frame('iframeResult')
elem = driver.find_element_by_xpath("//a[@href='/images/myw3schoolsimage.jpg']") elem.click() #file exists check exists_status = driver.execute_script('lambda-file-exists=myw3schoolsimage.jpg') print(exists_status)
# get file stats file_properties = driver.execute_script('lambda-file-stats=myw3schoolsimage.jpg') print(file_properties)
# download file-base64 file_content = driver.execute_script('lambda-file-content=myw3schoolsimage.jpg') print(file_content)
data = base64.b64decode(file_content) f = open("myw3cImage.jpg", "wb") f.write(data) driver.execute_script("lambda-status=passed")
def tearDown(self): """ Quit selenium driver """ self.driver.quit()
if __name__ == "__main__": unittest.main()Downloading File Using Selenium With Node.js#
const webdriver = require('selenium-webdriver');
const USERNAME = 'user_name';
dashboard or profile sectionconst KEY = 'access_Key';
// gridUrl: gridUrl can be found at automation dashboardconst GRID_HOST = 'hub.lambdatest.com/wd/hub';
const fs = require('fs');
function downloadFeature() {
// Setup Input capabilities const capabilities = { platform: 'windows 10', browserName: 'chrome', version: '79.0', resolution: '1280x800', network: true, visual: true, console: true, video: true, name: 'Test 1', // name of the test build: 'NodeJS build' // name of the build }
const gridUrl = 'https://' + USERNAME + ':' + KEY + '@' + GRID_HOST;
const driver = new webdriver.Builder() .usingServer(gridUrl) .withCapabilities(capabilities) .build();
driver.get('https://www.w3schools.com/tags/tryit.asp?filename=tryhtml5_a_download').then(function() { driver.switchTo().frame("iframeResult").then(function() { driver.findElement(webdriver.By.xpath("//a[@href='/images/myw3schoolsimage.jpg']")).click().then(function() { driver.getTitle().then(function(title) { // check if file exists driver.executeScript('lambda-file-exists=myw3schoolsimage.jpg').then(function(file_exists){ console.log(file_exists); })// get file stats driver.executeScript('lambda-file-stats=myw3schoolsimage.jpg').then(function(file_properties) { console.log(file_properties); }) // get file base64 driver.executeScript('lambda-file-content=myw3schoolsimage.jpg').then(function(get_file_content) { fs.writeFile('myfile.jpg', get_file_content, {encoding: 'base64'}, function(err) { console.log(get_file_content.toString('base64')); }); })
driver.quit();
}); }); }); }) .catch(function(err){ console.log("test failed with reason "+err) driver.executeScript('lambda-status=failed'); driver.quit(); });}downloadFeature();Downloading File Using Selenium With C##
using System;using OpenQA.Selenium;using OpenQA.Selenium.Remote;using NUnit.Framework;using System.Threading;using System.Collections.Generic;using System.Linq.Expressions;using System.IO;​namespace NUnitSelenium{ [TestFixture("chrome", "84.0", "Windows 10")] [Parallelizable(ParallelScope.Children)] public class NUnitSeleniumSample { public static string LT_USERNAME = Environment.GetEnvironmentVariable("LT_USERNAME") ==null ? "your username" : Environment.GetEnvironmentVariable("LT_USERNAME"); public static string LT_ACCESS_KEY = Environment.GetEnvironmentVariable("LT_ACCESS_KEY") == null ? "your accessKey" : Environment.GetEnvironmentVariable("LT_ACCESS_KEY"); public static bool tunnel = Boolean.Parse(Environment.GetEnvironmentVariable("LT_TUNNEL")== null ? "false" : Environment.GetEnvironmentVariable("LT_TUNNEL")); public static string build = Environment.GetEnvironmentVariable("LT_BUILD") == null ? "your build name" : Environment.GetEnvironmentVariable("LT_BUILD"); public static string seleniumUri = "https://hub.lambdatest.com:443/wd/hub";​​ ThreadLocal<IWebDriver> driver = new ThreadLocal<IWebDriver>(); private String browser; private String version; private String os;​ public NUnitSeleniumSample(String browser, String version, String os) { this.browser = browser; this.version = version; this.os = os; }​ [SetUp] public void Init() { DesiredCapabilities capabilities = new DesiredCapabilities(); capabilities.SetCapability(CapabilityType.BrowserName, browser); capabilities.SetCapability(CapabilityType.Version, version); capabilities.SetCapability(CapabilityType.Platform, os); capabilities.SetCapability("visual", true); capabilities.SetCapability("network", true); capabilities.SetCapability("console", true); ​ if (tunnel) { capabilities.SetCapability("tunnel", tunnel); } if (build != null) { capabilities.SetCapability("build", build); } capabilities.SetCapability("user", LT_USERNAME); capabilities.SetCapability("accessKey", LT_ACCESS_KEY);​ capabilities.SetCapability("name", String.Format("{0}:{1}", TestContext.CurrentContext.Test.ClassName, TestContext.CurrentContext.Test.MethodName)); driver.Value = new RemoteWebDriver(new Uri(seleniumUri), capabilities, TimeSpan.FromSeconds(600)); Console.Out.WriteLine(driver); }​ [Test] public void Todotest() { { try { Console.WriteLine("Navigating to todos app."); driver.Value.Navigate().GoToUrl("https://www.w3schools.com/tags/tryit.asp?filename=tryhtml5_a_download"); driver.Value.SwitchTo().Frame("iframeResult"); driver.Value.FindElement(By.XPath("//a[@href='/images/myw3schoolsimage.jpg']")).Click();​ Console.WriteLine(((IJavaScriptExecutor) driver.Value).ExecuteScript("lambda-file-stats=myw3schoolsimage.jpg"));​ String base64EncodedFile = ((IJavaScriptExecutor)driver.Value).ExecuteScript("lambda-file-content=myw3schoolsimage.jpg").ToString(); Console.WriteLine(base64EncodedFile); byte[] data = System.Convert.FromBase64String(base64EncodedFile); base64EncodedFile = System.Text.ASCIIEncoding.ASCII.GetString(data); Console.WriteLine(data); } catch(Exception e) { Console.WriteLine(e); } } }​ [TearDown] public void Cleanup() { bool passed = TestContext.CurrentContext.Result.Outcome.Status == NUnit.Framework.Interfaces.TestStatus.Passed; try { ((IJavaScriptExecutor)driver.Value).ExecuteScript("lambda-status=" + (passed ? "passed" : "failed")); } finally { // Terminates the remote webdriver session driver.Value.Quit(); } } }}Downloading File Using Selenium With Ruby#
require 'selenium-webdriver'require 'test/unit'
class LtTest < Test::Unit::TestCase """ LambdaTest selenium automation sample example Configuration ---------- username: Username can be found at automation dashboard accessToken: AccessToken can be generated from automation dashboard or profile section
Result ------- Execute Ruby Automation Tests on LambdaTest Distributed Selenium Grid """
def setup """ Setup remote driver Params ---------- platform : Supported platform - (Windows 10, Windows 8.1, Windows 8, Windows 7, macOS High Sierra, macOS Sierra, OS X El Capitan, OS X Yosemite, OS X Mavericks) browserName : Supported platform - (chrome, firefox, Internet Explorer, MicrosoftEdge) version : Supported list of version can be found at https://www.lambdatest.com/capabilities-generator/
Result ------- """ username= "prateeks" accessToken= "ABCDEFGHIJKLMNOPQRST" gridUrl = "hub.lambdatest.com/wd/hub" caps = { :browserName => "chrome", :version => "80.0", :platform => "win10", :name => "LambdaTest ruby google search name", :build => "LambdaTest ruby google search build", :network => false, :visual => false, :video => true, :console => false } puts (caps) # URL: https://{username}:{accessToken}@hub.lambdatest.com/wd/hub @driver = Selenium::WebDriver.for(:remote, :url => "https://"+username+":"+accessToken+"@"+gridUrl, :desired_capabilities => caps) end
def test_Login """ Setup remote driver Params ---------- Execute test: Download File from remote browser Sample in Ruby Result ------- File exists """ puts("Navigate the URL") sleep(10) @driver.get("https://www.w3schools.com/tags/tryit.asp?filename=tryhtml5_a_download") @driver.switch_to.frame('iframeResult') elem = @driver.find_element(:xpath, "//a[@href='/images/myw3schoolsimage.jpg']") elem.click fileExist= @driver.execute_script("lambda-file-exists=myw3schoolsimage.jpg") puts(fileExist) fileGet = @driver.execute_script('lambda-file-stats=myw3schoolsimage.jpg') puts(fileGet) fileCon = @driver.execute_script('lambda-file-content=myw3schoolsimage.jpg') puts(fileCon)
end def teardown """ Quit selenium driver """ @driver.quit endendGot Questions? Give a Shout to us. We’re here for you 24/7. Happy testing! 🙂