AdvancedWebDriverUsageTests.cs

[TestMethod]
public void VerifyFileDownloadFirefox()
{
    string expectedFilePath = @"c:\temp\Testing_Framework_2015_3_1314_2_Free.exe";
    try
    {
        String downloadFolderPath = @"c:\temp\";
        FirefoxProfile profile = new FirefoxProfile();
        profile.SetPreference("browser.download.folderList", 2);
        profile.SetPreference("browser.download.dir", downloadFolderPath);
        profile.SetPreference("browser.download.manager.alertOnEXEOpen", false);
        profile.SetPreference("browser.helperApps.neverAsk.saveToDisk", "application/msword, application/binary, application/ris, text/csv, image/png, application/pdf, text/html, text/plain, application/zip, application/x-zip, application/x-zip-compressed, application/download, application/octet-stream");
        this.driver = new FirefoxDriver(profile);

        driver.Navigate().GoToUrl("https://www.telerik.com/download-trial-file/v2/telerik-testing-framework");
        WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(30));
        wait.Until((x) =>
        {
            return File.Exists(expectedFilePath);
        });
        FileInfo fileInfo = new FileInfo(expectedFilePath);
        long fileSize = fileInfo.Length;
        Assert.AreEqual(4326192, fileSize);
    }
    finally
    {
        if (File.Exists(expectedFilePath))
        {
            File.Delete(expectedFilePath);
        }
    }
}