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Feb 12, 2019 · The answer is a full demonstration of how to set it up, including how to access the TestEnvironment object within the test fixtures. The TestEnvironment shown IS the environment object, getStartTime () is one of its attributes. This answer is 3 years old now, and I've switched to Rust so not keeping up with googletest.
- Installing Molecule. Assuming you have pip installed, Installing Molecule is quite easy: pip install molecule. Check if it's working: $ molecule --version molecule, version 2.19.0.
- Initializing a new role with Molecule. Before we start integrating Molecule into an existing role, let's take a look at the 'happy path'—using Molecule itself to init a new role
- Role development with Molecule. I used to use this Ansible role testing 'shim' script to do lightweight development of my roles, but it was a little bit of a hassle using it, and I didn't have a quick "build me a local environment to work in and leave it running" mode, without setting some extra environment variables.
- Configure Molecule. If you've been working through the examples in this blog post, you'll notice Molecule puts out a lot of notices about skipped steps, like
- Ansible Testing Levels
- How It Works?
- Installing Molecule
- Initializing A New Role
- Typical Test Workflow
- Debugging A Molecule Test
- Testing Ansible Playbooks
- Recommended Resources
You probably heard of the test pyramidin software development. The test pyramid defines three layers : unit tests, integrations tests and end-to-end tests. Infrastructure as Code (IaC) testing using Ansible tools involves the same concepts: There are multiple levels of testing with Ansible (from bottom to top): 1. Unit tests: 1.1. Testing yaml stru...
Testing steps
When running tests (molecule test), Molecule goes through a series of steps (the test matrix). Here is a summary: 1. dependency: collect required dependencies (roles, collections) using specified dependency manager (in molecule.yml), Galaxy is the default one 2. lint: lint project using an external shell command (ansible-lintis recommended) 3. cleanup: (using a provided cleanup.yml, specified in molecule.yml). This playbook is used to clean up test infrastructure set up in the prepare phase....
Molecule is easy to install: Note: The Molecule team highly recommends to install it in a Python virtual environment using pyenv. If you are not very familiar with Python or don't have any valid Python install, I recommend its use through Docker: It's fair easy and allows you to get started without installing Python, pip, and its various dependenci...
Initializing a new role using Molecule is also easy: Using Docker (Linux): On Windows: Ansible's Galaxy users will not be lost as Molecules uses it to generate role layouts. If you are not familiar with Ansible Galaxy, you can review the directory structure here.
As stated at the beginning of this tutorial, Molecule will go through a long series of steps (the test matrix), listed below by Molecule itself: This test matrix is similar to the Maven lifecycle, for those who know well Maven (welcome Java developers ;). As the entire test matrix takes some time to complete, a typical workflow when developing a ro...
When your tests are failing, it can be very useful to inspect the created instance to see what's happening inside.
As the converge.ymlfile is just an Ansible playbook that is run to execute tests, testing a playbook is quite similar to testing a role. First, issue this command to create a new scenario in your playbook's directory: Then, instead of including a role in the converge.ymlfile, simply import a playbook: Run the molecule converge command to execute th...
Books
The must-read book on this topic is obviously Ansible for DevOps by the famous Jeff Geerling, which is also the author of 99 Ansible roles.
Courses
For those who prefer watching screencasts over reading books, here is a great one on Pluralsight, authored by RedHat: https://app.pluralsight.com/library/courses/ansible-fundamentals/table-of-contents For an in-depth tutorial, head over this course: https://app.pluralsight.com/library/courses/getting-started-ansible/table-of-contents If you don't own a Pluralsight account yet, use this linkto get 50% off your first month or 15% off an annual subscription.
Docs
The official documentation.
May 11, 2024 · The Challenge of Changing Environment Variables. In other languages, such as JavaScript, we can very easily modify the environment in a test: beforeEach (() => {. process. env. MY_VARIABLE = 'set'; }); Copy. Java is a lot more strict. In Java, the environment variable map is immutable.
If you are a Python developer who likes to keep application configuration in simple Python modules and that your app have some default settings and production/dev/test setting files, converge can help you merge settings and start the application with desired settings based on environment variables. 2 Getting started 2.1 Easy to use
Nov 18, 2022 · 1. pytest tests/test_env_vars_env_file.py. Using the python-dotenv package is a cleaner and more scalable way to define environment variables. This package can read .env files or even load environment variables from a local environment. However, it’s tough to isolate the test environment from the local environment.
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Starting in CONVERGE 3.0, the periodic matching directions do not need to be coordinate-aligned, periodic faces do not need to be planar, and a case can have multiple periodic matching directions. In CONVERGE 2.4, the rotational periodic boundaries were limited by z as the axis of rotation, xz as symmetry plane, and planar faces.
