Remote File Upload using Selenium 2's FileDetectors

testing_upload_se2_sauce.rb

require 'rubygems'
require "test/unit"
require 'selenium-webdriver'

class ExampleTest < Test::Unit::TestCase
   def setup
      caps = Selenium::WebDriver::Remote::Capabilities.firefox
      caps.version = "5"
      caps.platform = :XP
      caps[:name] = "Remote File Upload using Selenium 2 with Ruby"
      caps['selenium-version'] = "2.18.0"

      @driver = Selenium::WebDriver.for(
        :remote,
        :url => "http://<username>:<api-key>@saucelabs.com:4444/wd/hub",
        :desired_capabilities => caps)

      @driver.file_detector = lambda do |args|
         # args => ["/path/to/file"]
         str = args.first.to_s
         str if File.exist?(str)
      end
   end

   def test_sauce
      @driver.navigate.to "http://sl-test.herokuapp.com/guinea_pig/file_upload"
      element = @driver.find_element(:id, 'myfile')
      element.send_keys "/Users/sso/SauceLabs/sauce/hostess/maitred/maitred/public/images/darkbulb.jpg"

      @driver.find_element(:id, "submit").click
      @driver.find_element(:tag_name, "img")
      assert "darkbulb.jpg (image/jpeg)" == @driver.find_element(:tag_name, "p").text
   end

   def teardown
      @driver.quit
   end
end

TestingUploadSe2Sauce.java

import junit.framework.Assert;
import junit.framework.TestCase;
import org.openqa.selenium.*;
import org.openqa.selenium.remote.*;
import java.net.URL;
import java.util.concurrent.TimeUnit;

public class TestingUploadSe2Sauce extends TestCase {
    private RemoteWebDriver driver;

    public void setUp() throws Exception {
        DesiredCapabilities capabillities = DesiredCapabilities.firefox();
        capabillities.setCapability("version", "7");
        capabillities.setCapability("platform", Platform.XP);
        capabillities.setCapability("selenium-version", "2.18.0");
        capabillities.setCapability("name", "Remote File Upload using Selenium 2's FileDetectors");

        driver = new RemoteWebDriver(
           new URL("http://<username>:<api-key>@ondemand.saucelabs.com:80/wd/hub"),
           capabillities);
        driver.setFileDetector(new LocalFileDetector());
        driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
    }

    public void testSauce() throws Exception {
        driver.get("http://sl-test.herokuapp.com/guinea_pig/file_upload");
        WebElement upload = driver.findElement(By.id("myfile"));
        upload.sendKeys("/Users/sso/the/local/path/to/darkbulb.jpg");
        driver.findElement(By.id("submit")).click();
        driver.findElement(By.tagName("img"));
        Assert.assertEquals("darkbulb.jpg (image/jpeg)", driver.findElement(By.tagName("p")).getText());
    }

    public void tearDown() throws Exception {
        driver.quit();
    }
}

file_detector needs updated to str if File.exist?(str) and File.file?(str) to follow a bug with string "." being treated as a folder
SeleniumHQ/selenium@3dadcdc