nextpage

npage

    def nextPage(self):
        """Continue to the next page.

        IE is notorious for not registering click events. Let's make sure when
        we go to the next page the state has changed.

        Try 3 times. With a second of elapsed time between each try.
        """
        initial = self.surveyState.getHTMLAttribute('value')
        self.contBtn.click()
        current = self.surveyState.getHTMLAttribute('value')

        attempts = 0
        while True:
            if initial != current:
                break
            elif attempts >= 3:
                break

            self.contBtn.click()
            time.sleep(1)
            attempts += 1

CONTINUE_TRIES = 3
SLEEP = 1 # in seconds

def clickBtn(self, btn, isSuccessful, tries=1, delay=SLEEP):
'''click a button; allows X tries before it fails'''

assert tries > 0, "number of tries must be greater than 0"

attempts = 0

while 1:
    btn.click()
    attempts += 1

    if isSuccessful(self):
        break
    if attempts >= tries:
        raise Exception('button failed to click within the defined number of tries')
    time.sleep(delay)

def clickContinueBtn(self):
'''click the continue button'''

def getSuccessFn():
    original = self.surveyState.getHTMLAttribute('value')
    def isSuccessful(instance):
        return original == instance.surveyState.getHTMLAttribute('value')
    return isSuccessful

self.clickBtn(self.contBtn, getSuccessFn(), tries=CONTINUE_TRIES)