Selenium JavascriptExecutor Calculation

Question

我试着在JavaScriptExecutor上做一个例子。

测试网站是：http://www.anaesthetist.com/mnm/javascript/calc.htm

测试场景为：3 + 9 = 12（加）

我写了下面的代码，但没有奏效。我调试代码，我在页​​面上看到了12个结果，但在断言点处，我从.getText（）方法获得了空值。

这里是我的代码：

public class CalculatorExampleTest { 
static WebDriver driver; 
private static String url = "http://www.anaesthetist.com/mnm/javascript/calc.htm"; 

//Setup Driver 
@BeforeClass 
public static void setupTest() { 
    driver = new FirefoxDriver(); 
    driver.navigate().to(url); 
    driver.manage().window().maximize(); 
} 

@Test 
public void calculatorJavaScriptTest() { 
    //Declare a Webdriver Wait 
    WebDriverWait wait = new WebDriverWait(driver, 10); 

    //1-) Click "9" 
    driver.findElement(By.cssSelector("input[type='button'][onclick='AddDigit(\\'9\\')']")).click(); 

    //2-) Click "+" 
    driver.findElement(By.cssSelector("input[type='button'][onclick='Operate(\\'+\\')']")).click(); 

    //3-) Click "3" 
    driver.findElement(By.cssSelector("input[type='button'][onclick='AddDigit(\\'3\\')']")).click(); 

    //4-) Declare JavaScriptExecutor and call "Calculate()" function 
    JavascriptExecutor js =(JavascriptExecutor)driver; 
    js.executeScript("Calculate();"); 

    //driver.findElement(By.cssSelector("input[type='button'][onclick='Calculate()']")).click(); 

    //5-) Check result is 12? 
    //Wrapped Anonymous Class (Synchronization) 
    wait.until(textDisplayed(By.cssSelector("input[name='Display']:nth-child(1)"),"12")); 

    WebElement result = driver.findElement(By.cssSelector("input[name='Display']:nth-child(1)")); 
    assertThat(result.getText(), is("12")); 

} 

//Wrapped Anonymous Class 
private ExpectedCondition<Boolean> textDisplayed (final By elementFindBy, final String text){ 
    return new ExpectedCondition<Boolean>() { 
     @Override 
     public Boolean apply(WebDriver webDriver) { 
      return webDriver.findElement(elementFindBy).getText().contains(text); 
     } 
    }; 
} 

//Close Driver 
@AfterClass 
public static void quitDriver() { 
    driver.quit(); 
} 

}

Answer 1

由于这是input元素，你需要得到value属性值，而不是文本：

WebElement result = driver.findElement(By.cssSelector("input[name=Display]")); 
assertThat(result.getAttribute("value"), is("12"));