Running PyTest in GitHub Actions - Practice Problems & Coding Challenges

Challenge - 5 Problems

💻 Command Output

intermediate

What is the output of this GitHub Actions step running PyTest?

Given this GitHub Actions YAML snippet, what will be the output shown in the logs if all tests pass?

PyTest

steps:
  - name: Run tests
    run: pytest --maxfail=1 --disable-warnings -q

A All tests skipped

B 1 passed, 0 failed, 0 skipped

C SyntaxError: invalid syntax

D No tests collected

💡 Hint

PyTest shows a summary line with passed, failed, and skipped tests.

The command runs PyTest quietly with warnings disabled and stops after one failure. If all tests pass, the output summary shows '1 passed, 0 failed, 0 skipped'.

❓ Configuration

intermediate

Which GitHub Actions YAML snippet correctly installs dependencies and runs PyTest?

Select the YAML snippet that correctly installs Python dependencies from requirements.txt and runs PyTest in GitHub Actions.

A

steps:
  - uses: actions/checkout@v3
  - name: Install dependencies
    run: pip install pytest
  - name: Run tests
    run: pytest

B

steps:
  - uses: actions/checkout@v3
  - name: Setup Python
    uses: actions/setup-python@v4
    with:
      python-version: '3.12'
  - name: Run tests
    run: pytest

C

steps:
  - uses: actions/checkout@v3
  - name: Setup Python
    uses: actions/setup-python@v2
    with:
      python-version: '2.7'
  - name: Run tests
    run: pytest

D

steps:
  - uses: actions/checkout@v3
  - name: Setup Python
    uses: actions/setup-python@v4
    with:
      python-version: '3.12'
  - name: Install dependencies
    run: pip install -r requirements.txt
  - name: Run tests
    run: pytest

💡 Hint

You need to set up Python 3.12 and install dependencies before running tests.

Option D correctly checks out code, sets up Python 3.12, installs dependencies from requirements.txt, then runs PyTest. Other options miss installing dependencies or use wrong Python versions.

❓ Troubleshoot

advanced

Why does this GitHub Actions PyTest step fail with 'ModuleNotFoundError'?

You have this step in your workflow: steps: - uses: actions/checkout@v3 - name: Run tests run: pytest But the logs show 'ModuleNotFoundError: No module named mypackage'. What is the most likely cause?

A PyTest is not installed in the runner environment.

B The checkout action failed to download the code.

C The Python environment is missing the package dependencies because pip install was not run.

D The pytest command syntax is incorrect.

💡 Hint

Check if dependencies are installed before running tests.

Without installing dependencies, the Python environment lacks the required packages, causing ModuleNotFoundError. The checkout action succeeded since code is present, pytest command is valid, and pytest is usually pre-installed or installed with dependencies.

🔀 Workflow

advanced

What is the correct order of steps to run PyTest in GitHub Actions?

Arrange these steps in the correct order to run PyTest successfully in GitHub Actions:

A 2,4,1,3

B 4,2,1,3

C 2,1,4,3

D 1,2,4,3

💡 Hint

You must have code checked out before installing dependencies and running tests.

First, checkout code (2), then setup Python (4), then install dependencies (1), finally run tests (3). Other orders break dependencies or run tests before setup.

✅ Best Practice

expert

Which GitHub Actions configuration best ensures test failures stop the workflow immediately?

You want your GitHub Actions workflow to stop running further steps if PyTest finds any failing tests. Which configuration achieves this?

A run: pytest --maxfail=1 --disable-warnings -q

B run: pytest --continue-on-collection-errors

C run: pytest || true

D run: pytest --maxfail=0

💡 Hint

Look for an option that stops after the first failure.

Option A uses --maxfail=1 to stop after one failure, causing the step to fail and stop the workflow. Option A ignores failures, option A continues despite collection errors, option A disables maxfail stopping.