Selenium-webdriver系列教程(9)————如何操作select下拉框
在selenium-webdriver中定位select list的方法比较简单，用id和name等属性可以很方便的将select给找出来，但是怎么去选择下拉框中的某一项呢？
思路是这样的，首先定位到select list元素，然后找出该select list下所有的option，点击该option element既可，以下面的html代码为例
<html> <head> <title>Select</title> </head> <body> <span>select demo</span> <select id = "s" name = "ns"> <option value = "0">Op1</option> <option value = "1">Op2</option> <option value = "2">Op3</option> <option value = "3">Op4</option> </select> </body></html>
require 'rubygems'require 'selenium-webdriver'dr = Selenium::WebDriver.for :firefoxselect_file = 'file:///'.concat File.expand_path(File.join(File.dirname(__FILE__), 'select.html'))dr.navigate.to select_filedr.find_element(:id => 's').find_elements(:tag_name => 'option')[1].click
easy_wrap.rbrequire 'rubygems'require 'selenium-webdriver'module EasyWrap class Select def initialize e raise NotValidElementError unless e.is_a?(Selenium::WebDriver::Element) @e = e child_options end def select_by_value value @ops.each do |op| op.click if op['value'] == value end end def select_by_index index @ops[index].click if valid_index? index end def select_by_text text @ops.each do |op| op.click if op['text'] == text end end def valid_index? index index.to_i < (@ops.size - 1) end def child_options begin @ops = @e.find_elements(:tag_name => 'option') rescue raise CanNotFindOptionError, "can not find options in #{@o}" exit end end def options @ops_text_arr = [] @ops.each do |op| @ops_text_arr << op['text'] end @ops_text_arr end end class EasyWrapError < StandardError; end class NotValidElementError < EasyWrapError; end class CanNotFindOptionError < EasyWrapError; endend #EasyWrap通过引用该文件，我们的代码此时就应该是如下所示：select.rbrequire './easy_wrap'dr = Selenium::WebDriver.for :firefoxselect_file = 'file:///'.concat File.expand_path(File.join(File.dirname(__FILE__), 'select.html'))dr.navigate.to select_files = EasyWrap::Select.new dr.find_element(:id => 's')# 选择value是1的options.select_by_value('1')sleep 2# 选择index是2的option,也就是第3个options.select_by_index(2)sleep 2# 选择text是Op4的options.select_by_text('Op4')sleep 3dr.close