python 需要调用 WebDriverWait 两次

Question

I am writing an automated test with Selenium in Python. I do not understand why in the piece of code below the until method of WebdriverWait needs to be called twice, because otherwise the text input will not be filled. What do I need to add or delete so that the html input field is filled without the need to call to WebDriverWait.until() twice? The method looks like this: class SomeClass: usernameId = 'username' passwordId = 'password' def doSomething(self, username, password): wait = WebDriverWait(self.driver, 10) sleep(2) # TODO: find out why one wait is not enough, and how it should be done properly. element = wait.until(EC.element_to_be_clickable((By.ID, self.usernameId))) # Why is the seconde line needed? Without it the input is not filled. It should not be? element = wait.until(EC.element_to_be_clickable((By.ID, self.usernameId))) element.send_keys(username) d = self.driver wait.until(lambda d: element.get_attribute("value") == username) class SomeClass: usernameId = 'username' passwordId = 'password' def doSomething(self, username, password): wait = WebDriverWait(self.driver, 10) sleep(2) # TODO: find out why one wait is not enough, and how it should be done properly. element = wait.until(EC.element_to_be_clickable((By.ID, self.usernameId))) # Why is the seconde line needed? Without it the input is not filled. It should not be? element = wait.until(EC.element_to_be_clickable((By.ID, self.usernameId))) element.send_keys(username) d = self.driver wait.until(lambda d: element.get_attribute("value") == username)

 pwdElement = wait.until(EC.element_to_be_clickable((By.ID, self.passwordId))) # Why is the seconde line needed? Without it the input is not filled. It should not be? pwdElement = wait.until(EC.element_to_be_clickable((By.ID, self.passwordId))) pwdElement.send_keys(password) wait.until(lambda d: pwdElement.get_attribute("value") == password) sleep(2) inloggenButton = wait.until(EC.element_to_be_clickable((By.ID, self.inloggenButtonId))) inloggenButton.click() GeneralPage(self.driver).logged_on()

Answer 1

It looks absolutely redundant.
You can remove one of element = wait.until(EC.element_to_be_clickable((By.ID, self.usernameId))) lines and the sleep(2) too.
Possibly your site loads too much time and the 10 seconds timeout is not enough.
In this case you can set the timeout to 30 or even 60 seconds, as following:

class SomeClass:
    usernameId = 'username'
    passwordId = 'password'
    def doSomething(self, username, password):
        wait = WebDriverWait(self.driver, 60)

        # TODO: find out why one wait is not enough, and how it should be done properly.
        element = wait.until(EC.element_to_be_clickable((By.ID, self.usernameId)))

        element.send_keys(username)
        d = self.driver
        wait.until(lambda d: element.get_attribute("value") == username)


        pwdElement = wait.until(EC.element_to_be_clickable((By.ID, self.passwordId)))
        # Why is the seconde line needed? Without it the input is not filled. It should not be?
        pwdElement = wait.until(EC.element_to_be_clickable((By.ID, self.passwordId)))
        pwdElement.send_keys(password)
        wait.until(lambda d: pwdElement.get_attribute("value") == password)
    
        inloggenButton = wait.until(EC.element_to_be_clickable((By.ID, self.inloggenButtonId)))
        inloggenButton.click()
    GeneralPage(self.driver).logged_on()

Not sure about identation, copy-pasted it from your question...