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Testing in GO

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song jiayang
song jiayang

About go unit test, content contains: - Why Unit Test - Basic Knowledge - Table Testing - Testing HTTP - Other Packages - Other Mock Packages - Testing with Docker

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Testing In GO How to write efficient unit test songjiayang@JDCloud
Agenda ? Why Unit Test ? Basic Knowledge ? Table Testing ? Testing HTTP ? Other Packages ? Other Mock Packages ? Testing with Docker
Why Unit Test ? Finds bugs early ? Debugging process ? Avoids breaking old code ? Quality of code ? Reduce costs ? Makes the process agile ? ´.. Find Debug Refactor Improve Reduce Make agile Reference https://dzone.com/articles/top-8-benefits-of-unit-testing
So, Unit test should be a consensus !
But, Why not yet
Why not yet ? Lack of basic knowledge ? Don't know how to use tools ? Don't know how to mock ? Writing not boring unit tests not easy
Basic knowledge ? Tests are written on files ending with "_test.go" ? Test function starts with Test* and has only the parameter *testing.T ? Use go test command to run your tests https://golang.org/pkg/testing
go test ? go test // testing the local package ? go test some/pkg // testing a specific package ? go test some/pkg/´ // testing a specific package in recursive ? go test -v some/pkg Crun ^TestSum$ // runs a specified tests ? go test -cover // code coverage ? go test -count=1 // testing without cache ? ´. https://golang.org/pkg/cmd/go/internal/test/
Table Testing A example about IPV4 regexp: `^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0- 5]).){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0- 9]|25[0-5])$`
Table Testing ? Using anonymous structs to represent test cases ? Using Subtests with t.Run
Testing HTTP A example about user login ? Read body ? Unmarshal LoginForm ? Check Input data
Testing HTTP ? Use httptest.NewRecorder no need listen ? Use errorReader to improve coverage https://golang.org/pkg/net/http/httptest
Other Packages
Testify ? Run within go test ? Assertions, mostly shortcuts ? Mocking https://github.com/stretchr/testify (10k+ stars)
GinkGo ? BDD ? Work with go test, but has it's own structure ? Uses a custom lib for assertion (Gomega) ? Rerun testes on change https://github.com/onsi/ginkgo (4k stars) https://en.wikipedia.org/wiki/Behavior-driven_development
GinkGo ? ginkgo bootstrap ? ginkgo generate gotesting ? ginkgo || go test ? ginkgo watch
GinkGo ? ginkgo bootstrap ? ginkgo generate gotesting ? ginkgo || go test ? ginkgo watch
GoConvey ? BDD alike ? Work with go test ? Pretty browser interface ? Reload tests on file changes ? Custom DSL ? goconvey || go test https://github.com/smartystreets/goconvey (5.7k stars)
GoConvey http://127.0.0.1:8080/
GoConvey http://127.0.0.1:8080/
Other Mock Packages
GoMock ? Official library ? An interface mock ? Mock and stub support ? Generate code with command `mockgen` https://github.com/golang/mock mockgen -source=../post/post.go - destination=mock_post_test.go -package=gomocktesting
GoMock A example about PostService
GoMock
GoMock
HTTPMock ? Mock http request ? Custom any response ? Base URL regular matching https://github.com/jarcoal/httpmock
HTTPMock A example about post client to fetch items and unmarshal
HTTPMock
HTTPMock
SQLMock ? Mock for database/sql ? Base regular matching ? Support query, exec, transaction https://github.com/DATA-DOG/go-sqlmock
SQLMock A example about PostDAO implement
SQLMock
SQLMock
Testing with Docker
Go docker image A example to run our tests docker run --volume=$(pwd):/ws -- workdir=/ws golang:1.13.10 /bin/bash -c "GOPROXY=off go test - v -cover -count=1 -mod=vendor ./... https://hub.docker.com/_/golang
Custom docker image A example to run our tests with MongoDB
Conclusion ? Unit test should be a consensus ? Unit test in go is easy ? Mock make our testing efficient ? Service should be an interface for mock friendly ? Standard lib is good enough (table testing, testing HTTP) ? Other frameworks make testing better and documentation ? Docker can be used for more complex environment
Thanks you! Code at https://github.com/songjiayang/gotesting

More Related Content

Testing in GO

  • 1. Testing In GO How to write efficient unit test songjiayang@JDCloud
  • 2. Agenda ? Why Unit Test ? Basic Knowledge ? Table Testing ? Testing HTTP ? Other Packages ? Other Mock Packages ? Testing with Docker
  • 3. Why Unit Test ? Finds bugs early ? Debugging process ? Avoids breaking old code ? Quality of code ? Reduce costs ? Makes the process agile ? ´.. Find Debug Refactor Improve Reduce Make agile Reference https://dzone.com/articles/top-8-benefits-of-unit-testing
  • 4. So, Unit test should be a consensus !
  • 6. Why not yet ? Lack of basic knowledge ? Don't know how to use tools ? Don't know how to mock ? Writing not boring unit tests not easy
  • 7. Basic knowledge ? Tests are written on files ending with "_test.go" ? Test function starts with Test* and has only the parameter *testing.T ? Use go test command to run your tests https://golang.org/pkg/testing
  • 8. go test ? go test // testing the local package ? go test some/pkg // testing a specific package ? go test some/pkg/´ // testing a specific package in recursive ? go test -v some/pkg Crun ^TestSum$ // runs a specified tests ? go test -cover // code coverage ? go test -count=1 // testing without cache ? ´. https://golang.org/pkg/cmd/go/internal/test/
  • 9. Table Testing A example about IPV4 regexp: `^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0- 5]).){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0- 9]|25[0-5])$`
  • 10. Table Testing ? Using anonymous structs to represent test cases ? Using Subtests with t.Run
  • 11. Testing HTTP A example about user login ? Read body ? Unmarshal LoginForm ? Check Input data
  • 12. Testing HTTP ? Use httptest.NewRecorder no need listen ? Use errorReader to improve coverage https://golang.org/pkg/net/http/httptest
  • 14. Testify ? Run within go test ? Assertions, mostly shortcuts ? Mocking https://github.com/stretchr/testify (10k+ stars)
  • 15. GinkGo ? BDD ? Work with go test, but has it's own structure ? Uses a custom lib for assertion (Gomega) ? Rerun testes on change https://github.com/onsi/ginkgo (4k stars) https://en.wikipedia.org/wiki/Behavior-driven_development
  • 16. GinkGo ? ginkgo bootstrap ? ginkgo generate gotesting ? ginkgo || go test ? ginkgo watch
  • 17. GinkGo ? ginkgo bootstrap ? ginkgo generate gotesting ? ginkgo || go test ? ginkgo watch
  • 18. GoConvey ? BDD alike ? Work with go test ? Pretty browser interface ? Reload tests on file changes ? Custom DSL ? goconvey || go test https://github.com/smartystreets/goconvey (5.7k stars)
  • 22. GoMock ? Official library ? An interface mock ? Mock and stub support ? Generate code with command `mockgen` https://github.com/golang/mock mockgen -source=../post/post.go - destination=mock_post_test.go -package=gomocktesting
  • 23. GoMock A example about PostService
  • 26. HTTPMock ? Mock http request ? Custom any response ? Base URL regular matching https://github.com/jarcoal/httpmock
  • 27. HTTPMock A example about post client to fetch items and unmarshal
  • 30. SQLMock ? Mock for database/sql ? Base regular matching ? Support query, exec, transaction https://github.com/DATA-DOG/go-sqlmock
  • 31. SQLMock A example about PostDAO implement
  • 35. Go docker image A example to run our tests docker run --volume=$(pwd):/ws -- workdir=/ws golang:1.13.10 /bin/bash -c "GOPROXY=off go test - v -cover -count=1 -mod=vendor ./... https://hub.docker.com/_/golang
  • 36. Custom docker image A example to run our tests with MongoDB
  • 37. Conclusion ? Unit test should be a consensus ? Unit test in go is easy ? Mock make our testing efficient ? Service should be an interface for mock friendly ? Standard lib is good enough (table testing, testing HTTP) ? Other frameworks make testing better and documentation ? Docker can be used for more complex environment
  • 38. Thanks you! Code at https://github.com/songjiayang/gotesting