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ginkgo
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Writing tests for a Kubernetes Operator
Ginkgo: a testing framework based on the concept of "Behavior Driven Development" (BDD)
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We moved our Cloud operations to a Kubernetes Operator
We were also able to leverage Ginkgo's parallel testing runtime to run our integration tests on multiple concurrent processes. This provided multiple benefits: we could run our entire integration test suite in under 10 minutes and also reuse the same suite to load test the operator in a production-like environment. Using these tests, we were able to identify hot spots in the code that needed further optimization and experimented with ways to save API calls to ease the load on our own Kubernetes API server while also staying under various AWS rate limits. It was only after running these tests over and over again that I felt confident enough to deploy the operator to our dev and prod clusters.
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Recommendations for Learning Test-Driven Development (TDD) in Go?
A bit off-topic, but i really like the ginkgo BDD framework
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Start test names with “should” (2020)
You obviously are not familiar with the third circle of golang continuous integration hell that is ginkgo+gomega:
https://onsi.github.io/ginkgo/#adding-specs-to-a-suite
It’s actually worse than that example suggests. Stuff like Expect(“type safety”).ShouldBe(GreaterThan(13)) throws runtime errors.
The semantics of parallel test runs weren’t defined anywhere the last time I checked.
Anyway, you’ll be thinking back fondly to the days of TestShouldReplaceChildrenWhenUpdatingInstance because now you need to write nested function calls like:
Context(“instances”, func …)
Describe(“that are being updated”, …)
Expect(“should replace children”, …)
And to invoke that from the command line, you need to write a regex against whatever undocumented and unprinted string it internally concatenates together to uniquely describe the test.
Also, they dump color codes to stdout without checking that they are writing to a terminal, so there will be line noise all over whatever automated test logs you produce, or if you pipe stdout to a file.
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ginkgo integration with jira/elasticsearch/webex/slack
If you are using Ginkgo for your e2e, this library might of help.
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Testing frameworks, which to use?
https://onsi.github.io/ginkgo/ offers a simple way to create tables with different scenarios useful to generate different test cases based on a file like a yml without to need to develop useless code. Maybe at start seems to be a little verbose but depends how you design the test case.
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Testza - A modern test framework with pretty output
What are people’s thoughts on testing frameworks? I’ve heard that most devs only use the testing package in the standard library and the testify package for assertions— I assume this is because Go is meant to be lightweight and scalable, and adding external dependencies basically goes against that. But I’ve also seen devs use packages like ginkgo to make tests more structured and readable. What do you guys think?
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What are your favorite packages to use?
Ginkgo Behavioural test framework
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Air – Live reload when developing with Go
If you write your tests with Ginkgo [0] its CLI can do this for you. It also has nice facilities to quickly disable a test or portion of a test by pretending an X to the test function name, or to focus a test (only run that test) by prepending an F. It’s pretty nice.
[0]: https://onsi.github.io/ginkgo/
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Half a million lines of Go at The Khan Academy
The BDD testing framework Ginko [1] has some "weird" / unidiomatic patterns, yet it is very popular
https://github.com/onsi/ginkgo
godog
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Godog integration test failing with weird error
It's complaining about a file missing in $GOPATH/pkg... but I'm not sure how do I get the packages its asking for. Things I have tried: - running go mod tidy - running go get -u github.com/cucumber/godog (hoping it would add the files to pkg/mod/... - Uninstalled and installed Go again.
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What's your favourite part of unit testing?
I also use BDD (Gherkin with godog in particular) to verify and document the expected behaviour of a product from an end user's perspective when needed. I usually do this when the product also contains untested code that I have no control over when I'm working on a problem - this gives me peace of mind over something I can't control while doubling as documentation.
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Behaviour Driven Development (BDD) boilerplate tests generator
It looks like it is not possible to share steps between scenario's or features. In https://github.com/cucumber/godog it is possible to share steps.
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Behaviour Driven Development (BDD) boilerplate tests generator for Golang
Differences between gherkingen and godog are:
- BDD (Behavior-driven development) mit Go
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.
goblin - Minimal and Beautiful Go testing framework
venom - 🐍 Manage and run your integration tests with efficiency - Venom run executors (script, HTTP Request, web, imap, etc... ) and assertions
httpexpect - End-to-end HTTP and REST API testing for Go.
assert - :exclamation:Basic Assertion Library used along side native go testing, with building blocks for custom assertions
gocheck - Rich testing for the Go language
gomega - Ginkgo's Preferred Matcher Library
go-cmp - Package for comparing Go values in tests
Gauge - Light weight cross-platform test automation