How can I use WebDriverWait to wait until an attribute changes?
In my AUT I have to wait for a button to become enabled before continuing, unfortunately due to the way the developer coded the page I can't use WebElement's isEnabled() method. The developer is using some CSS to just make the button look like it's disabled so the user can't click on it and the method isEnabled always returns true for me. So what I have to do is get the attribute "aria-disabled" and check whether the text is "true" or "false". What I've been doing so far is a for loop with Thread.sleep, something like this:
for(int i=0; i<6; ++i){ WebElement button = driver.findElement(By.xpath("xpath")); String enabled = button.getText() if(enabled.equals("true")){ break; } Thread.sleep(10000); }
(disregard the code above if incorrect, just pseudo code of what I'm doing)
I'm sure there's a way to achieve something similar using WebDriverWait which is the preferred method I just can't figure out how. This is what I'm trying to achieve even though the following won't work:
WebDriverWait wait = new WebDriverWait(driver, 60); wait.until(ExpectedConditions.visibilityOf(refresh.getText() == "true"));
Obviously it doesn't work because the function is expecting a WebElement not String but it's what I'm trying to evaluate. Any ideas?
Selenium WebDriverWait is one of the Explicit waits. Explicit waits are confined to a particular web element. Explicit Wait is code you define to wait for a certain condition to occur before proceeding further in the code.
WebDriverWait by default calls the ExpectedCondition every 500 milliseconds until it returns successfully. A successful return value for the ExpectedCondition function type is a Boolean value of true, or a non-null object.
FluentWait is a generic class and WebDriverWait is its specialization class with WebDriver instance. Since WebDriverWait is specialization class of FluentWait class, it ignores instances of NotFoundException that are encountered (thrown) by default in the 'until' condition, and immediately propagate all others.
In order to declare explicit wait, one has to use “ExpectedConditions”. The following Expected Conditions can be used in Explicit Wait. To use Explicit Wait in test scripts, import the following packages into the script. Then, Initialize A Wait Object using WebDriverWait Class.
The following might help your requirement. In the following code, we override apply method incorporating the condition that we are looking for. So, as long as the condition is not true, in our case, the enabled is not true, we go in a loop for a maximum of 10 seconds, polling every 500 ms (this is the default) until the apply method returns true.
WebDriverWait wait = new WebDriverWait(driver,10); wait.until(new ExpectedCondition<Boolean>() { public Boolean apply(WebDriver driver) { WebElement button = driver.findElement(By.xpath("xpath")); String enabled = button.getAttribute("aria-disabled"); if(enabled.equals("true")) return true; else return false; } });
If someone wants to use @Sri as a method in a Selenium wrapper, here is a way to do it (thanks to this answer btw):
public void waitForAttributeChanged(By locator, String attr, String initialValue) { WebDriverWait wait = new WebDriverWait(this.driver, 5); wait.until(new ExpectedCondition<Boolean>() { private By locator; private String attr; private String initialValue; private ExpectedCondition<Boolean> init( By locator, String attr, String initialValue ) { this.locator = locator; this.attr = attr; this.initialValue = initialValue; return this; } public Boolean apply(WebDriver driver) { WebElement button = driver.findElement(this.locator); String enabled = button.getAttribute(this.attr); if(enabled.equals(this.initialValue)) return false; else return true; } }.init(locator, attr, initialValue)); }
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