WebDriver driver;
      String baseUrl = "http://example.com";
    @BeforeClass

  public void beforeClass() {
      System.setProperty("webdriver.firefox.marionette","local path to geckodriver-v0.10.0-win64");
      DesiredCapabilities capabilities = DesiredCapabilities.firefox();
      capabilities.setCapability("marionette", true);
      driver = new FirefoxDriver();
  }

  @Test
  public void login() throws InterruptedException {
      driver.get(baseUrl);
      Thread.sleep(3000);
  }

  @AfterClass
  public void afterClass() {
  }