使用自定义库运行机器人框架测试用例时，如何解决“NameError: global name 'x' is not defined”错误？

Question

I am seeing the "NameError: global name 'x' is not defined" error while running a testcase in Robot Framework.

Following is my custom library file (modified as per Bryan Oakley's comments):

import re

def pass_fail_criteria():
    if int(re.findall(r"NUM_FLOWS\n-+[\s\S]*?(\d+)\s*-+", x)[0]):
        return "pass"
    else:
        return "fail"

Following is the "pass_fail.robot" file contents:

*** Settings ***
Library         Selenium2Library
Library         SSHLibrary
Library         regexp_def.py
Suite Setup     Go to gmail page
Suite Teardown  Close All Browsers

*** Variables ***
${HOMEPAGE}     https://www.gmail.com/intl/en/mail/help/about.html
${BROWSER}      firefox
${LOGINPAGE}    https://www.gmail.com/intl/en/mail/help/about.html
${FINALURL}     https://mail.google.com/mail/
${FINALURL1}    https://accounts.google.com/ServiceLogin?service=mail&continue=https://mail.google.com/mail/'

${HOST}         1.1.1.1
${USERNAME}     test
${PASSWORD}     test



*** Test Cases ***
Login into gmail
    Go to gmail page
    Login Page Should Be Open
    Click Signin Button
    Input Username        test@gmail.com
    Input Password        test@123
    Submit Credentials
    Inbox page should open

Check Deep Packet Inspection Stats
    Open Connection         ${HOST}
    enable ssh logging      XYZ
    Login    ${USERNAME}    ${PASSWORD}
    Write                   enable
    Write                   show dpi app stats gmail on AVC/ap7532-15E8CC
    ${x}                    Read Until Regexp   .*#


Pass fail Criteria
    ${status}               pass fail criteria
    should be equal         ${status}           pass
    ${result}               Pass fail criteria  ${x}

*** Keywords ***
Go to gmail page
    Open Browser    ${HOMEPAGE}     ${BROWSER}
    Maximize Browser Window

Login Page Should Be Open
    Location Should Be        ${LOGINPAGE}

Click Signin Button
    Click Element     id=gmail-sign-in

Input Username
    [Arguments]       ${username}
    Input Text        id=Email    ${username}


Input Password
    [Arguments]       ${password}
    Input Text        id=Passwd    ${password}

Submit Credentials
    Click Button    id=signIn

Inbox page should open
    Location Should Be        ${FINALURL}

I am getting the following error while running this file:

C:\Users\symbol\Desktop\Projects\gmail_stats_with_pass_fail_criteria>pybot pass_
fail.robot
==============================================================================
Pass Fail
==============================================================================
Login into gmail                                                      | PASS |
------------------------------------------------------------------------------
Check Deep Packet Inspection Stats                                    | PASS |
------------------------------------------------------------------------------
Pass fail Criteria                                                    | FAIL |
NameError: global name 'x' is not defined
------------------------------------------------------------------------------
Pass Fail                                                             | FAIL |
3 critical tests, 2 passed, 1 failed
3 tests total, 2 passed, 1 failed
==============================================================================
Output:  C:\Users\symbol\Desktop\Projects\gmail_stats_with_pass_fail_criteria\ou
tput.xml
Log:     C:\Users\symbol\Desktop\Projects\gmail_stats_with_pass_fail_criteria\lo
g.html
Report:  C:\Users\symbol\Desktop\Projects\gmail_stats_with_pass_fail_criteria\re
port.html

C:\Users\symbol\Desktop\Projects\gmail_stats_with_pass_fail_criteria>

There are issues in the below code:

Pass fail Criteria
    ${status}           pass fail criteria
    should be equal     ${status}             pass
    ${result}           Pass fail criteria    ${x}

How can I fix this issue?

Answer 1

You have several problems working against you. It seems like you have a fundamental misunderstanding of how Python-based keywords work.

Two keywords with the same name

You are defining and importing a library named regexp_def.py. In it there is one keyword, "pass_fail_criteria". Robot will remove the underscores, so from Robot's perspective, this keyword is named "Pass fail criteria".

In your test case you are also creating a keyword called "Pass fail criteria". It is unclear why you're doing that. Do not do that. Remove that keyword; it is unnecessary.

The variables "x" and "${x}"

You are using a variable x in pass_fail_criteria , but you haven't defined it. That is what the error is telling you. You need to define it, or pass it in. To pass it in you need to make it a parameter, and then you need to provide a value for that parameter. This is no different than any other keyword, or any other function.

In file regexp_def.py :

import re

def pass_fail_criteria(x):
    if int(re.findall(r"NUM_FLOWS\n-+[\s\S]*?(\d+)\s*-+",x)[0]):
        return "pass"
    else:
        return "fail"

(notice the added parameter in the definition)

In your test case:

Pass fail Criteria
    ${status}               pass fail criteria    ${x}

(notice the argument on the end of the second line)

Independent test cases

The way you currently have your test cases structured, you are defining ${x} in one test case, and then attempting to use it in another. I don't know if this was intentional or not, but many people consider this bad test case design. Test cases should be as independent as possible.

While you can do this (using the built-in keyword Set Suite Variable ), I recommend calling pass fail criteria in the test case named "Check Deep Packet Inspection Stats", where ${x} is defined.

For example:

Check Deep Packet Inspection Stats
    ...
    ${x}                    Read Until Regexp       .*#
    ${status}               pass fail criteria      ${x}
    Run keyword if          "${status}" == "pass"   ...

Answer 2

x is not defined and you are using x in the following statement.

if int(re.findall(r"NUM_FLOWS\\n-+[\\s\\S]*?(\\d+)\\s*-+",x)[0]):

Pass x as an argument to function pass_fail_criteria(x) and use try except

def pass_fail_criteria(x):
    try:
        a = int(re.findall(r"NUM_FLOWS\n-+[\s\S]*?(\d+)\s*-+",x)[0])
        return "pass"
    except:
        return "fail"