Docker-based test execution in PyTest - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the main benefit of running tests inside a Docker container?

Running tests inside a Docker container ensures a consistent environment, so tests behave the same way on any machine.

beginner

How do you specify the command to run pytest inside a Docker container?

You specify the command in the Dockerfile or docker-compose.yml using CMD ["pytest"] or by passing it in docker run.

intermediate

Why is it important to mount your test code directory as a volume in Docker when running tests?

Mounting your test code as a volume lets Docker use the latest code without rebuilding the image every time you change tests.

beginner

What is a common way to install pytest and dependencies inside a Docker container?

Use a requirements.txt file and add RUN pip install -r requirements.txt in the Dockerfile.

beginner

How can you view test results when running pytest inside Docker?

Test results appear in the Docker container's output logs, which you can see by running docker logs [container_id] or directly in the terminal if you run interactively.

What command runs pytest tests inside a Docker container?

A docker run myimage pytest

B docker build pytest

C docker start pytest

D docker stop pytest

You use 'docker run' with the image name and the command 'pytest' to run tests inside the container.

Why use Docker volumes when running tests?

A To increase container memory

B To speed up Docker image building

C To share test code between host and container without rebuilding

D To run tests faster on the host

Volumes let you share files between your computer and the container, so you can change code without rebuilding the image.

Where should you install pytest in a Docker setup?

A Inside the Dockerfile using pip

B On the host machine only

C After running tests

D In the docker-compose.yml file

Installing pytest inside the Dockerfile ensures the container has all needed tools to run tests.

How do you see test output when running pytest in Docker interactively?

A Output is sent to Docker Hub

B Output is saved in a file only

C Output is hidden by default

D Output shows directly in the terminal

Running Docker interactively shows the test output directly in your terminal.

What is the purpose of a Dockerfile in test execution?

A To store test results

B To define the environment and commands to run tests

C To write test cases

D To manage test reports

A Dockerfile sets up the environment and specifies how to run tests inside the container.

Explain how Docker helps create a consistent test environment for pytest.

Think about how Docker packages everything needed for tests.

Describe the steps to run pytest tests inside a Docker container using a Dockerfile.

Consider what a Dockerfile needs to prepare and how to execute tests.