如何查找是否已定义变量? [英] How do I find if a variable has been defined?

问题描述

如何确定我的Robot Framework脚本中是否已定义变量?我正在做API测试，而不是UI测试.我的设置和拆卸过程很复杂，并且由于我正在通过脚本与多台计算机进行交互，因此，如果发生致命错误，了解当前状态非常重要.我可以跟踪一些复杂的元变量集或变量跟踪列表所做的工作，但我更喜欢查询是否已定义了特定变量，如果需要，则采取适当的拆卸步骤.

How do I find out if a variable has been defined in my Robot Framework script? I am doing API testing, not UI testing. I have a complex set up and tear-down sequence and, since I am interacting with multiple computers through the script, it is important to know the current state if a fatal error has occurred. I could track what I have done with some complex set of meta variables or a variable tracking list, but I would prefer to query if a particular variable has been defined and if so take the appropriate tear-down steps.

简化版本如下:

*** Test Cases ***
Check monitor
    ${monitored}=  Connect to Monitor  ${Monitor IP Address}  ${User name}  ${password}
    ${peer connected}=  Connect to Monitor  ${Peer IP Address}  ${User name}  ${password}
    Get Information from Monitor  ${IP Address}
    Send Info to Peer   ${buffer1}
    Report back to Monitor  ${Monitor IP Address}

我们假设拆解会关闭连接.我想关闭所有打开的连接，但是如果我无法打开对等连接，我将关闭监视器连接，并在关闭监视器连接时失败.

We are assuming that the tear-down closes the connections. I want to close any connections that are open, but if I failed to open the peer connection I will close the monitor connection and fail on closing the monitor connection.

我正在尝试确定是否定义了$ {peer connected}.我可以查看Robot Framework的变量存储以查看它是否存在(在该词典中吗?)?

I am trying to determine if ${peer connected} is defined. Can I look into Robot Framework's variable storage to see if it is there (in that dictionary?)?

推荐答案

您可以调用

You can call Get Variables to get a dictionary of all variables, then check whether the variable you're interested in is in the dictionary.

*** Test cases ***
Example
    ${foo}=        set variable  hello, world
    ${variables}=  Get variables

    Should be true      "\${foo}" in $variables
    Should not be true  "\${bar}" in $variables

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