gomega
go-cmp
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gomega | go-cmp | |
---|---|---|
6 | 7 | |
2,076 | 3,975 | |
- | 1.7% | |
8.1 | 3.7 | |
8 days ago | 4 months ago | |
Go | Go | |
MIT License | BSD 3-clause "New" or "Revised" License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
gomega
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Writing tests for a Kubernetes Operator
Gomega: is a test assertion library, a vital dependency on Ginkgo.
- Quick tip: Easy test assertions with Go generics
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Learning Go by examples: part 6 - Create a gRPC app in Go
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.
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Tips to prevent adoption of your API
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.
- fluentassert - a prototype of yet another assertion library
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Go generics beyond the playground
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.
go-cmp
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Visualizing Diffs The Myers difference algorithm
This made me think of a couple other interesting things:
1. you can change which algorithm is used in git diff as multiple are supported
https://luppeng.wordpress.com/2020/10/10/when-to-use-each-of...
2. Google has an edit graph implementation in Go in the cmp package
https://github.com/google/go-cmp/blob/master/cmp/internal/di...
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How do you do DB preparation in e2e tests?
Assertion libraries that people seem to love: - testify (my favorite) - go-cmp is a more barebones library - gotest.tools -- I have never used this but some swear by it
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alecthomas/assert: A minimalist type-safe drop-in replacement for testify/require
it uses https://github.com/google/go-cmp instead of reflect.DeepEqual
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What annoys you about Go?
When I use functional arguments, I either prefix all of the options with the same prefix or put them in a dedicated package (like cmpopts) to help the IDE.
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Migrating from PHP to Go
Checking for equality in tests: https://github.com/google/go-cmp
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What are your favorite packages to use?
oklog/ulid to generate IDs. coreos/go-oidc for validating JWTs I get from auth. google/go-cmp for comparing structs in tests (unless the project is already using Testify). spf13/pflag because life's too short for Go's flag handling. getkin/kin-openapi for validating reqests/responses against my OpenAPI spec (in tests).
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Go Package for Equality: github.com/google/go-cmp
One thing to keep in mind about reflect.DeepEqual is because of the way it is implemented you could get positive results when the values are not actually the same, see this comment for reference.
What are some alternatives?
Testify - A toolkit with common assertions and mocks that plays nicely with the standard library
GoConvey - Go testing in the browser. Integrates with `go test`. Write behavioral tests in Go.
ginkgo - A Modern Testing Framework for Go
godog - Cucumber for golang
go-testdeep - Extremely flexible golang deep comparison, extends the go testing package, tests HTTP APIs and provides tests suite
assert - :exclamation:Basic Assertion Library used along side native go testing, with building blocks for custom assertions
JSON-to-Go - Translates JSON into a Go type in your browser instantly (original)
goblin - Minimal and Beautiful Go testing framework
gocheck - Rich testing for the Go language
assert - A simple assertion library using Go generics