selenium webdriver三種等待方法

webdriver三種等待方法

1.使用WebDriverWait

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait                            # available since 2.4.0
from selenium.webdriver.support import expected_conditions as EC           # available since 2.26.0
driver = webdriver.Firefox()
driver.get("http://somedomain/url_that_delays_loading")
try:
    element = WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.ID, "myDynamicElement")))
finally:
    driver.quit()

presence_of_element_located可以替換為

• title_is
• title_contains
• presence_of_element_located
• visibility_of_element_located
• visibility_of
• presence_of_all_elements_located
• text_to_be_present_in_element
• text_to_be_present_in_element_value
• frame_to_be_available_and_switch_to_it
• invisibility_of_element_located
• element_to_be_clickable - it is Displayed and Enabled.
• staleness_of
• element_to_be_selected
• element_located_to_be_selected
• element_selection_state_to_be
• element_located_selection_state_to_be
• alert_is_present

By.ID中的ID可替換為'CLASS_NAME', 'CSS_SELECTOR', 'ID', 'LINK_TEXT', 'NAME', 'PARTIAL_LINK_TEXT', 'TAG_NAME', 'XPATH'

2、隱式等待，相當於設置全局的等待，在定位元素時，對所有元素設置超時時間。

隱式等待使得WebDriver在查找一個Element或者Element數組時，每隔一段特定的時間就會輪詢一次DOM，如果Element或數組沒有馬上被發現的話。

默認設置是0。

一旦設置，這個隱式等待會在WebDriver對象實例的整個生命周期起作用。
from selenium import webdriver
driver = webdriver.Firefox()
driver.implicitly_wait(10)                      # seconds
driver.get(http://www.xxx.com)
myDynamicElement = driver.find_element_by_id("ElementID")

3、強制等待

import time

time.sleep(10)