Selenium-Python-如何减少NoSuchElementException的时间

Question

I have a test case where I need to check that on clicking an element, a popup is NOT displayed. This code works fine, but it takes too long, 60 seconds for NoSuchElementException, print the PASS condition and move to next test case. How can I reduce the wait time in this case?

driver.find_element_by_xpath(
".//*[@id='assetIdDIV']/div/myaots-input/div/div/div[1]/span/i[2]"
).click()

try:
    DUP_popup = driver.find_element_by_xpath(
    ".//*[@id='DuplicateTicketsPopup']/div/div/div/div[1]/span[2]/img"
    )

    if (DUP_popup):
        print ("Duplicate tkts popup is displayed - Fail")

except NoSuchElementException:
        print ("Duplicate popup not displayed - PASS")

Answer 1

You can use explicit wait.

WebDriverWait by default calls the ExpectedCondition every 500 milliseconds until it returns successfully within timeout, otherwise throw TimeoutException

from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

try:
  DUP_popup = WebDriverWait(driver, 10).until(
    EC.presence_of_element_located((By.XPath, 
      "//*[@id='DuplicateTicketsPopup']/div/div/div/div[1]/span[2]/img"))
  )

  # This waits up to 10 seconds before throwing a TimeoutException 
  # unless it finds the element to return within 10 seconds.

  if (DUP_popup):
    print ("Duplicate tkts popup is displayed - Fail")

except TimeoutException:
  print ("Duplicate popup not displayed - PASS")

More detail about explicit wait and implicit wait can be found here

Answer 2

It is not clear to why it would take as long as 60 seconds to raise NoSuchElementException and print the pass condition but you can configure the wait period through a waiter inducing WebDriverWait as follows :

driver.find_element_by_xpath(".//*[@id='assetIdDIV']/div/myaots-input/div/div/div[1]/span/i[2]").click()
if(len(WebDriverWait(driver, 20).until(EC.presence_of_all_elements_located((By.XPATH, ".//*[@id='DuplicateTicketsPopup']/div/div/div/div[1]/span[2]/img"))))!= 0):
    print ("Duplicate tkts popup is displayed - Fail")
else:
    print ("Duplicate popup not displayed - PASS")

Note : Incase your program includes _implicitly_wait()_ you need to remove the instances of _implicitly_wait()_ as the documentation clearly mentions Do not mix implicit and explicit waits. Doing so can cause unpredictable wait times. Do not mix implicit and explicit waits. Doing so can cause unpredictable wait times.

Answer 3

Check your driver instance's implicit wait value. If implicit value is set to 60secs, then it'll wait till 60secs to throw any selenium related exceptions.