使用Selenium 2測試GWT應用程序

Question

我正在嘗試使用Selen來測試按鈕單擊。 我的第一頁有一個ID = HOME_START_BUTTON的按鈕。 當我點擊這個我的應用程序，然後進入一個ID = CONTACTS_ADD_BUTTON按鈕的頁面。 這是我必須測試的代碼。如果我註釋掉

private static boolean checkPageContainsStartButton() 
{ 
    // type search query 
    // driver.findElement(By.name("q")).sendKeys("qa automation\n"); 

    //Use static finals for these button names 
    WebElement startButton = driver.findElement(By.id("HOME_START_BTN")); 
    if (startButton == null) 
    { 
     return false; 
    } 
    else 
    { 
     startButton.click(); 
    } 

    WebElement myDynamicElement = (new WebDriverWait(driver, 30)) 
     .until(new ExpectedCondition<WebElement>(){ 
      @Override 
      public WebElement apply(WebDriver d) { 
      return d.findElement(By.id("CONTACTS_ADD_BTN")); 
    }}); 

    WebElement addButton = driver.findElement(By.id("CONTACTS_ADD_BTN")); 
} 

錯誤堆棧跟蹤

Command duration or timeout: 28 milliseconds 
For documentation on this error, please visit: http://seleniumhq.org/exceptions/no_such_element.html 
Build info: version: '2.29.0', revision: '58258c3', time: '2013-01-17 22:47:00' 
System info: os.name: 'Windows 7', os.arch: 'x86', os.version: '6.1', java.version: '1.7.0_04' 
Session ID: b25e7efb428c98da880826fbf9e68de6 
Driver info: org.openqa.selenium.chrome.ChromeDriver 
Capabilities [{platform=XP, chrome.chromedriverVersion=26.0.1383.0, acceptSslCerts=false, javascriptEnabled=true, browserName=chrome, rotatable=false, locationContextEnabled=false, version=24.0.1312.57, cssSelectorsEnabled=true, databaseEnabled=false, handlesAlerts=true, browserConnectionEnabled=false, nativeEvents=true, webStorageEnabled=true, applicationCacheEnabled=false, takesScreenshot=true}] 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) 
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) 
    at java.lang.reflect.Constructor.newInstance(Unknown Source) 
    at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:187) 
    at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:145) 
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:533) 
    at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:302) 
    at org.openqa.selenium.remote.RemoteWebDriver.findElementById(RemoteWebDriver.java:331) 
    at org.openqa.selenium.By$ById.findElement(By.java:216) 
    at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:294) 
    at WebDriverTestClass.checkPageContainsStartButton(WebDriverTestClass.java:67) 
    at WebDriverTestClass.main(WebDriverTestClass.java:35) 
Test failed. 

我測試通過

WebElement addButton = driver.findElement(By.id("CONTACTS_ADD_BTN")); 

所以基本上硒似乎並不能夠看到瀏覽器窗口時，在新的widget我做了一個按鈕點擊

Answer 1

您需要添加一個等待，直到第一個按鈕操作完成。在應用中的所有等待中使用默認常量。 DEFAULT_RPC_WAIT，DEFAULT_SCREEN_WAIT等。通過使用常量而不僅僅是幻數來幫助你知道你在哪裏設置了你的等待。

參考GWT準則WRT，以硒 - https://developers.google.com/web-toolkit/doc/latest/DevGuideTestingRemoteTesting

Answer 2

1. 您發佈ID = HOME_START_BUTTON
   但在你的代碼中，我看到：By.id("HOME_START_BTN")

2. 從findElement方法webdriver的接口評論：
   findElement不應該用於查找不存在的元素，請使用findElements(By)並取而代之聲明零長度響應。

   /** 
   * Find the first {@link WebElement} using the given method. 
   * This method is affected by the 'implicit wait' times in force at the time of execution. 
   * The findElement(..) invocation will return a matching row, or try again repeatedly until 
   * the configured timeout is reached. 
   * 
   * findElement should not be used to look for non-present elements, use {@link #findElements(By)} 
   * and assert zero length response instead. 
   * 
   * @param by The locating mechanism 
   * @return The first matching element on the current page 
   * @throws NoSuchElementException If no matching elements are found 
   * @see org.openqa.selenium.By 
   * @see org.openqa.selenium.WebDriver.Timeouts 
   */ 
   WebElement findElement(By by);