将重复性动作进行封装为keyword，在测试用例中调用keyword。
*** Settings ***
Documentation Simple example using SeleniumLibrary.
Library SeleniumLibrary
*** Variables ***
${URL} https://www.baidu.com
${BROWSER} Chrome
*** Test Cases ***
case1
Open Browser ${URL} ${BROWSER}
${title} Baidu Search robot framework
should contain ${title} robot framework_百度搜索
close browser
case2
Open Browser ${URL} ${BROWSER}
${title} Baidu Search selenium
should contain ${title} selenium_百度搜索
close browser
*** Keywords ***
Baidu Search
[Arguments] ${search_key}
Input text id:kw ${search_key}
click button id:su
Evaluate time.sleep(2) time
${title} Get Title
[Return] ${title}
*** S
