#!usr/bin/env python ?#-*- coding:utf-8 -*- ?#在HTML5的画布元素上进行绘画操作import unittest,timefrom selenium import webdriverclass TestDemo(unittest.TestCase): ???def setUp(self): ???????self.driver = webdriver.Chrome() ???def test_HTML5Canvas(self): ???????url = ‘http://www.w3school.com.cn/tiy/loadtext.asp?f=html5_canvas_line‘ ???????self.driver.get(url) ???????self.driver.execute_script("var c = document.getElementById(‘myCanvas‘);" ??????????????????????????????????#getElementById(‘myCanvas‘);获取页面上的画布元素 ??????????????????????????????????+ "var cxt = c.getContext(‘2d‘);" ??????????????????????????????????#var cxt = c.getContext(‘2d‘);设定画布为2d ??????????????????????????????????+ "cxt.fillStyle = ‘#FF0000‘;" ??????????????????????????????????#cxt.fillStyle = ‘#FF0000‘;设定填充色为红色 ??????????????????????????????????+ ‘cxt.fillRect(0,0,150,150);‘) ??????????????????????????????????#cxt.fillRect(0,0,150,150);在画布上绘制矩阵 ???????time.sleep(3) ???????self.driver.save_screenshot("e:\\HTML5Canvas.png") ???def tearDown(self): ???????self.driver.quit()if __name__ == ‘__main__‘: ???unittest.mian()在HTML5的画布元素上进行绘画操作
原文地址：https://www.cnblogs.com/sleeping-cat/p/8278726.html