gomega VS k8s-operator-talk

Gomega: is a test assertion library, a vital dependency on Ginkgo.

Gomega is a Go library that allows you to make assertions. In our example, we check if what we got is null, not null, or equal to an exact value, but the gomega library is much richer than that.

Depends on the API and how much testing you need. You want to test your code, not the API's availability or correctness.

But it can be as easy as using a fake http library and mocking the responses, or using a httptest server: https://onsi.github.io/gomega/#ghttp-testing-http-clients

If the API is complicated and you have to write your own fake server, that might not make sense for small projects.

If we do the count, we gather that subtest appear to solve five out of the six problems we identified with the assert library. At this point though, it's important to note that at the time when the assert package was designed, the sub-test feature in Go did not yet exist. Therefore it would have been impossible for that library to embed it into it's design. This is also true for when Gomega and Ginko where designed. If these test frameworks where created now, then most likely some parts of their design would have been done differently. What I am trying to say is that with even the slightest change in the Go language and standard library, completely new ways of designing programs become possible. Especially for new packages without any legacy use-cases to consider. And this brings us to generics.

You can find the code in this post on GitHub.

The first command generates all the files necessary to create the CRD. The second generates a docker container and pushes it to the indicated repository. The last command installs the generated container on the cluster. Tip: You can automate controller generation and installation in your development environment using Tilt. This project's repository has a Tiltfile that does all this work. To learn more about Tilt, check out my post about the tool.