获得验证信息及设置元素等待

web自动化测试中，用的最多的几种验证信息是title, current_url, text。title:获取当前页面标题；current_url：获取当前页面url；text： 获取当前页面文本信息。

from selenium import webdriver
import time

driver = webdriver.Firefox()
driver.get("https://www.baidu.com")

text = driver.find_element_by_id("s-bottom-layer-right").text
print(text)

title = driver.title
print(title)

now_url = driver.current_url
print(now_url)

"""
output:©2020 Baidu (京)-经营性-2017-0020京公网安备11000002000001号京ICP证030173号
百度一下，你就知道
https://www.baidu.com/
"""

from selenium import webdriver
import time

driver = webdriver.Firefox()
driver.get("https://www.baidu.com")
driver.find_element_by_id("kw").send_keys("python")
driver.find_element_by_id("su").click()
time.sleep(2)
title = driver.title
now_url = driver.current_url
nums = driver.find_element_by_class_name("nums_text").text


print(title)
print(now_url)
print(nums)

 2、设置元素等待:显示等待和隐士等待。

显示等待：webdriver等待某个条件成立则继续执行，否则在到达最大等待时长时抛出异常。

语法：WebDriverWait(driver, timeout, poll_frequency=0.5, ingored_exceptions=None)

driver: 浏览器驱动；timeout: 最长超时时间，默认以秒为单位；poll_frequency: 检测的时间间隔，默认0.5s；ingored_exceptions=None: 超时后异常信息。

WebDriverWait() 一般与until() 或until_not()方法配合使用：until(method, message=" ")； until_not(method, message=" ")

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

driver = webdriver.Firefox()
driver.get("http://www.baidu.com")

element = WebDriverWait(driver,5,0.5).until(
    EC.visibility_of_element_located((By.ID,"kw")))

element.send_keys("python")

driver.quit()

隐式等待：implicitly_wait(): 参数是时间，单位 s。

from selenium import webdriver
from selenium.common.exceptions import NoSuchElementException
from time import ctime

driver = webdriver.Chrome()


driver.implicitly_wait(10)
driver.get("https://www.baidu.com")


try:
    print(ctime())
    driver.find_element_by_id("kw2").send_keys("python")
    
except NoSuchElementException as e:
    print(e)

finally:
    print(ctime())
    driver.quit()