How do I wait for a value in a text box with Selenium in C#-CodePudding

I have a text input that is changed by Javascript based on values of other inputs.

How do I get Selenium to wait for it to change?

I currently have tried both

var wait3 = new WebDriverWait(_driver, TimeSpan.FromSeconds(5)).Until(driver => !driver.FindElement(By.Id("gbpAmount")).Equals(""));

and

bool pop= wait.Until<bool>((d) =>
            {
                var populated1 = d.FindElement(By.Id("gbpAmount")).Text != "";
                var populated2 = d.FindElement(By.Id("gbpAmount")).Text != "0";
                if (populated1 && populated2)
                {
                    return true;
                }
                else
                {
                    return false;
                }
            });

However neither of these methods work. Either they just pass through and when I fetch and check the element afterwards it is "" or they just exceed the wait time.

Yet clearly on the screen the value is changed...

CodePudding user response：

In Java the approach would be:

(new WebDriverWait(driver, Duration.ofSeconds(5))).until( ExpectedConditions.not(ExpectedConditions.attributeToBe(By.id("gbpAmount"), "value", "")));
String strAmount = driver.findElement(By.id("gbpAmount")).getAttribute("value");

So the equivalent in C# should work.

CodePudding user response：

You need to check the value DOM property of text inputs, not the Value property of IWebElement.

var wait = new WebDriverWait(driver, TimeSpan.FromSeconds(5));

wait.Until(d => d.FindElement(By.Id("gbpAmount")).GetProperty("value") != ""
             && d.FindElement(By.Id("gbpAmount")).GetProperty("value") != "0");

This should work for both <input type="X"> and <textarea>.

If the values are numeric in nature, this should wait until there is a non-zero result:

wait.Until(d => decimal.TryParse(d.FindElement(By.Id("gbpAmount")).GetProperty("value"), out decimal result) ? result != 0 : false);

Note that negative numbers will cause this to return true. If you want a positive number, change result != 0 to result > 0.