Question 303747 in Ubuntu Question posted in
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Ubuntu – pytest not able to retrieve environment variables of Azure devops pipeline

I am building a unit testing in my azure devops build pipeline. I am using the python library pytest. In one of my test cases, I am retrieving the environment variables. However, when I run the unit testing, the environment variable is not being retrieve so my testing fails.

This is the yaml of my build

- script: |
   
   pip install pytest pytest-cov
   echo %AUTOMATION_ENV%
   
   python -m pytest -v ./test/general/test_identity.py
   python -m pytest -v ./test/general/test_initialization.py
   
  displayName: 'Unit test'
  enabled: false
  env:
    AUTOMATION_ENV: unittest

When the echo runs, it successfully prints my variable but for some reason the unit testing can’t get it.

I am running this on a Windows agent.

I tried to do the unit testing in Github action to verify if there is a problem with the logic but it is running properly using this steps

          export AUTOMATION_ENV=unittest
          pip install pytest pytest-cov
          python -m pytest -v ./test/general/test_identity.py
          python -m pytest -v ./test/general/test_initialization.py

in github, it runs on ubuntu linux system. Im’m not sure if this plays a role in the error.

Tags:

2

Answers


  1. 0

    On Windows agents, the script task (a shortcut of Command line task) will use CMD to execute the script by default. Similarly, on Linux agents, it will use Bash to execute the script by default.

    For your case, you can try to check with the following things to fix the issue in your pipeline:

    1. Use the Bash task or PowerShell task to execute the script.

    2. Use the Linux agents to run the pipeline job.

    3. If you still want to use the Windows agent with CMD to execute the script, try to update your script like as below based on the statement here.

      - script: |
    call pip install pytest pytest-cov
    echo %AUTOMATION_ENV%
    call python -m pytest -v ./test/general/test_identity.py
    call python -m pytest -v ./test/general/test_initialization.py
  displayName: 'Unit test'
  enabled: false
  env:
    AUTOMATION_ENV: unittest
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  2. 0

    I create a sample for your case for both ubuntu agent and windows agent.

    modify the python file path with your own.

    test_identity.py

    import pytest
import os

def simple_fun2(s: str):
    return s + 'fun2'

#-------test--------#
env2 = os.environ["AUTOMATION_ENV"]

def test_two():
    assert simple_fun2(env2) == 'unittestfun2'

    test_initialization.py

    import pytest
import os

def simple_fun1(s: int):
    return s + "fun1"

#-------test--------#
env2 = os.environ["AUTOMATION_ENV"]

def test_one():
    assert simple_fun1(env2) == "unittestfun1"

    test.yaml

    jobs:
- job: ubuntuJob
  pool:
    vmImage: ubuntu-latest
  steps:
  - script: |
      pip install pytest pytest-cov
      echo $AUTOMATION_ENV

      python -m pytest -v ./pythonPytest/test_identity.py
      python -m pytest -v ./pythonPytest/test_initialization.py
    env:
      AUTOMATION_ENV: unittest

- job: windowsJob
  pool:
    vmImage: windows-latest
  steps:
  - script: |
      pip install pytest pytest-cov
      echo %AUTOMATION_ENV%

      python -m pytest -v ./pythonPytest/test_identity.py
      python -m pytest -v ./pythonPytest/test_initialization.py
    env:
      AUTOMATION_ENV: unittest

    Outputs: both echo and pytest works well:

    ubuntu job:

    enter image description here

    windows job:

    enter image description here

    just copy and paste and modify the file path then try yourself. hope this helps.

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