Skip to content

Unit Tests

We unit test our common library, while it isn’t near complete coverage but it does offer some basic checks.

Running the tests

Running these tests can be done any way you like. In this document we limit ourselves to using Visual Studio Code, using our Development Container.

Using Visual Studio Code

Our repo comes with a Visual Studio Code development container definition and launch.json that allow you to quickly set up an environment in which you can run the tests.


  • Visual Studio Code is installed.
  • Docker is installed and running.
  • The “Remote - Containers” extension is installed and enabled in Visual Studio Code.

For more details, please refer to the official documentation.

Running tests

Once Visual Studio Code is set up, and you open the charts workspace, you will see a popup asking if you wish to re-open the workspace in a development container:

Visual Studio Code development container popup

Select to do so and a Dockerized workspace will be built. You can now use Visual Studio Code as normal.

To run or debug the unit tests, click the “Run” button on the left sidebar and select the desired configuration:

Visual Studio Code run configurations

  • UnitTest - active spec file only: This configuration will try to run the currently opened test file.

    Note: Make sure that you have opened a valid test file (.rb files in the test/charts folder), or this will not work.

  • UnitTest - all spec files: This configuration will run the all test files in the test/charts folder.

Next, press the green “Play” icon. This will start the tests show the outcome in a terminal window.


A successful test will output something like the following…

Started with run options --seed 52955
common-test::statefulset volumeClaimTemplates
can set values for volumeClaimTemplates PASS (0.16s)
volumeClaimTemplates should be empty by default PASS (0.06s)
common-test::ports settings
targetPort can be overridden PASS (0.17s)
port name can be overridden PASS (0.17s)
defaults to name "http" on port 8080 PASS (0.16s)
targetPort cannot be a named port PASS (0.05s)
common-test::pod replicas
defaults to 1 PASS (0.08s)
accepts integer as value PASS (0.08s)
common-test::Environment settings
Check no environment variables PASS (0.05s)
set "valueFrom" environment variables PASS (0.11s)
set "static" and "Dynamic/Tpl" environment variables PASS (0.15s)
set "Dynamic/Tpl" environment variables PASS (0.11s)
set "static" environment variables PASS (0.10s)
ingress with hosts PASS (0.10s)
should be disabled when ingress.enabled: false PASS (0.06s)
ingress with hosts template is evaluated PASS (0.11s)
ingress with hosts and tls PASS (0.15s)
ingress with hosts and tls templates is evaluated PASS (0.16s)
should be enabled when ingress.enabled: true PASS (0.06s)
common-test::controller type
accepts "daemonset" PASS (0.06s)
accepts "statefulset" PASS (0.06s)
defaults to "Deployment" PASS (0.06s)
Finished in 2.26077s
22 tests, 59 assertions, 0 failures, 0 errors, 0 skips