java在测试通过后关闭浏览器

Question

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

public void signInFacebook(String link) throws InterruptedException {
    log.header("USER SIGN IN VIA FACEBOOK");
    log.step("Click the Sign In Link");
    clickLink(link);
    Thread.sleep(3000);
    log.log("click success.......");
    log.step("Click 'Sign in with Facebook' Link ");

    // Store the current window handle
    String parentHandle = driver.getWindowHandle();

    // Perform the click operation that opens new window
    driver.findElement(By.cssSelector(CONSTANTs.FB_SIGN_IN)).click();
    Thread.sleep(5000);

    // Switch to new window opened
    log.divider("Facebook Login Screen.....Enter Details Below");
    for (String childHandle : driver.getWindowHandles()) {
        driver.switchTo().window(childHandle);

        if (!childHandle.equals(parentHandle)) {
            log.step("Enter Email address");
            driver.findElement(By.cssSelector(CONSTANTs.FB_EMAIL_TXTBOX))
                    .sendKeys(CONSTANTs.EMAIL_ADDRESS);
            Thread.sleep(2000);
            log.step("Enter password");
            driver.findElement(By.cssSelector(CONSTANTs.FB_PASSWORD_TXTBOX))
                    .sendKeys(CONSTANTs.FB_PASSWORD);
            Thread.sleep(2000);
            log.step("Click Log_In button");
            driver.findElement(By.cssSelector(CONSTANTs.LOG_IN)).click();
            Thread.sleep(2000);
            log.log("Check for First Sign In or Return User.......wait");
            WebDriver switchPage = driver.switchTo().window(parentHandle);
            try {
                if (switchPage.getWindowHandle().contains(parentHandle)) {
                    driver.switchTo().window(childHandle);
                    log.log("Indo App NOT installed..... Click Ok to accept FB permissions...");
                    optionalClick(By.cssSelector(CONSTANTs.OK_CONTINUE_AS));
                    driver.switchTo().window(parentHandle);
                }
                log.log("DONE....... ");
                // break;
            } catch (Exception e) {
                log.log("Indo App Already exist on Users Fb acct ... Move to next screen");
            }
            break;
        }
    }

    log.log("Check if User is Signed In or Has Signed In with another account.......wait");
    Thread.sleep(5000);
    try {
        if ((driver.findElement(By.cssSelector(CONSTANTs.MY_ACCOUNT_LINK)))
                .isDisplayed()) {
            log.log("First Sign In ....... Successfully Logged in Using FB.");
            Thread.sleep(3000);
            tearDown();
        }
    } catch (Exception e) {
        log.header2("Second Sign In ...... User Already signed In with a different Acct........ pls wait");
    }
    driver.switchTo().window(parentHandle);     
    Thread.sleep(3000);

    try {
        if (driver.findElement(
                By.cssSelector(CONSTANTs.ALREADY_SIGNED_UP_PASSWD_TXTBOX))
                .isDisplayed()) {
            log.log("User Already signed Up with a NATIVE acct .....Please Enter Password for Native acct");
            driver.findElement(
                    By.cssSelector(CONSTANTs.ALREADY_SIGNED_UP_PASSWD_TXTBOX))
                    .sendKeys(CONSTANTs.NATIVE_PASSWORD);
            Thread.sleep(2000);
            driver.findElement(
                    By.cssSelector(CONSTANTs.ALREADY_SIGNED_UP_BTN))
                    .click();
            Thread.sleep(2000);
            log.log("Successfully Linked NATIVE acct with FB.");
            Thread.sleep(3000);
            tearDown();
        }

    } catch (Exception e1) {
        log.log(" acct....wait, checking other acct......");
    }


    try{
        if (driver.findElement(
                By.cssSelector(CONSTANTs.SIGN_IN_WITH_GOOGLE_BTN))
                .isDisplayed()) {
            log.log("User is Signed in Already with GOOGLE account ... Click Google button to Link account.");
            Thread.sleep(3000);
            driver.findElement(
                    By.cssSelector(CONSTANTs.SIGN_IN_WITH_GOOGLE_BTN))
                    .click();
            Thread.sleep(2000);
            log.log("Successfully Linked .");
            Thread.sleep(3000);
            tearDown();
        }
    }   
        catch(Exception e2) {
            log.log("No Google acct present either.... Please contact Gigya customer support....");
            Thread.sleep(3000);
            tearDown();
        }
}

Am trying to close the browser after a test pass at any stage in my code but i keep getting error below, What am trying to do in a nut shell is that, if my test passes at any stage, don't continues code execution, don't hang rather, close browser. Please take a closer look at were i have the tearDown(). if the login is successful at that point, then, browser should close after the sleep().

请注意，我已经检查了以前的解决方案，但不适用于我。驾驶员关闭或退出应该有效，但不是，也许我做错了。。。。。 提前谢谢你的帮助

线程“main”组织中出现异常。openqa。硒。遥远的SessionNotFoundException:会话ID为空。调用quit（）后使用WebDriver？ 构建信息：版本：“2.45.0”，修订版：“32a636c”，时间：“2015-03-05 22:01:35” 系统信息：主机：“Ola PC”，ip:“10.255.253.14”，操作系统。名称：“Windows 7”，操作系统。拱门：“amd64”，操作系统。版本：“6.1”，java。版本：“1.7.0_76” 司机信息：司机。版本：RemoteWebDriver 在org。openqa。硒。遥远的HttpCommandExecutor。execute（httpcommandexecuter.java:125） 在org。openqa。硒。遥远的服务驱动命令执行器。执行（DriverCommandExecutor.java:66） 在org。openqa。硒。遥远的RemoteWebDriver。执行（RemoteWebDriver.java:572） 在org。openqa。硒。遥远的RemoteWebDriver$RemoteTargetLocator。窗口（RemoteWebDriver.java:890） 在com上。独立的帮手testPageNavi。signInFacebook（testPageNavi.java:475） 在com上。独立的帮手测试。main（testing.java:113）