有直接消息，你可以使用执行脚本来创建变量。

所以我创建了一个关键字

  Validate child element exists

它需要两个参数parent（Webelement）和child（Xpath）在父级中搜索子级。

  Validate child element exists    ${parent}    ./h3

假设将父xpath设置为as //ul[@id="top_menu"]，则上面的代码将搜索等价的xpath//ul[@id="top_menu"]/./h3注意：上下文是父级而不是root

所以这将等同于xpath

*** Test Cases ***
Google Search
    [Tags]    you    probably    do    not    have    this    many    tags    in    real    life
    Wait Until Element Is Visible  CSS=[id="introduction-container"]
    ${parent}=    Get webelement    xpath=//*[@id="introduction-container"]
    ${result}=    Validate child element exists    ${parent}    ./h3   
    Should Be True     ${result}

    
*** Keywords ***
Validate child element exists 
    [Arguments]    ${parent}   ${child} 
    ${child}=    Execute Javascript    return window.document.evaluate( arguments[1], arguments[0], null, XPathResult.FIRST_ORDERED_NODE_TYPE, null ).singleNodeValue;     ARGUMENTS    ${parent}    ${child}
    [Return]    ${child}