Initial test setup errors on application start.

[kennethito]

Initial test setup errors on application start.

[mruoss]

That being said I'm gonna change the template to not add the operator to the supervision tree in :test env. Thanks for the issue.

[mruoss]

What is the errors you see? Can you try with mix test --no-start?

[kennethito]

What is the errors you see? Can you try with mix test --no-start?

The error and steps are in the repro link, but reposting here.

** (Mix) Could not start application bonny_example: BonnyExample.Application.start(:normal, [env: :test]) returned an error: shutdown: failed to start child: BonnyExample.Operator
    ** (EXIT) shutdown: failed to start child: %K8s.Operation{api_version: "bonny-example.test.com/v1", data: nil, method: :get, name: "BonnyExample", path_params: [namespace: "default"], query_params: [], verb: :list}
        ** (EXIT) exited in: GenServer.call(K8s.Client.DynamicHTTPProvider, {:locate, #PID<0.352.0>}, 5000)
            ** (EXIT) no process: the process is not alive or there's no process currently associated with the given name, possibly because its application isn't started

[kennethito]

mix test --no-start looks like it works. Is that the intended way to run the tests? --no-start refers to the application?

[mruoss]

--no-start refers to the application?

Yes, it means don't start the appilcation. But it is actually documented.

Is that the intended way to run the tests?

It depends on how you want to test your operator. Do you want to implement and run only unit tests or do you want to test it agains a real kubernetes cluster (integration tests) as well?

Unit tests only

You have two options:

• Use --no-start as described above
• In your appilcation.ex you get the mix environment. For :dev don't add the operator to the supervision tree

defmodule YourOperator.Application do
  use Application

  def start(_type, env: env) do
    children =
      case env do
        :test -> []
        _ -> [{YourOperator.Operator, conn: YourOperator.K8sConn.get!(env), name: YourOperator.Operator}]
      end

    opts = [strategy: :one_for_one, name: YourOperator.Supervisor]
    Supervisor.start_link(children, opts)
  end
end

With integration tests

This is advanced but if you want to run integration tests you're gonna have to create a local cluster (e.g. using k3d) and connect to that cluster. So you have to change YourOperator.K8sConn.get!(:test) to return a conn object to your local cluster. Make sure you generate the manifest and apply it to your cluster before you start the operator. This repository actually comes with integration tests. Use it to get inspired.