go_test_workshop

如何编写健壮的代码？测试或者单元测试是一个非常有效的手段。自1997年JUint的出世引领单元测试以来，单元测试曾经风靡一时。然后在最近的十年，或者说在最近的几年，互联网企业面临巨大的竞争压力，或者说代码规范不收重视的情况下，糙快猛的编程方式也收到吹捧，以至于单元测试没有收到足够的重视，因此留下来很多的技术债务和线上风险，也就是俗称的"雷"。

这个实战课程，全面介绍Go语言的单元测试的知识，通过大量的实战的代码，带你领略go test的便捷和强大，解答你在实际开发中的众多的疑惑，你在以后的Go应用程序的开发中，可以应用本文介绍的知识，把单元测试威力实际发挥出来。

如果你会写func TestXXX(t *testing.T) {这一行代码，恭喜你，你已经知道了Go的一半的单元测试的知识，你可以重点关注其它的一半的Go单元测试的知识。如果你还未写过Go的单元测试，没关系，本门课程手把手教你怎么轻轻松松编写Go的单元测试。

本课程的代码放在了 Go Test Workshop

• s1: go test basic

  • table driven tests
  • color output
    • gotest -v ./...

• s2: testing.T

  • testing.TB interface
  • testing.T
    • Fail/FailNow/Failed/Fatal/Fatalf
    • Log/Logf/Error/Errorf
    • Skip/SkipNow/Skipf/Skipped
    • Helper
    • Parallel

• s3: go test command

  • go help test

    • go test [build/test flags] [packages] [build/test flags & test binary flags]
    • local directory mode: cache disabled
    • package list mode: cache enabled. -count=1 to disable cache
    • test binary flags
      • -c: Compile the test binary to pkg.test but do not run it
      • -exec xprog
      • -json: Convert test output to JSON suitable for automated processing.
      • -o file:Compile the test binary to the named file.

  • go help testflag

    • -count n: Run each test, benchmark, and fuzz seed n times (default 1).
    • -cpu 1,2,4: Specify a list of GOMAXPROCS values for which the tests, benchmarks or fuzz tests should be executed.
    • -failfast: Do not start new tests after the first test failure.
    • -json
    • -list regexp
    • -parallel n
    • -run regexp
    • -short
    • -shuffle off,on,N
    • -timeout d
    • -v
    • -vet list

  • go help testfunc

    • func TestXxx(t *testing.T) { ... }
    • func BenchmarkXxx(b *testing.B) { ... }
    • func FuzzXxx(f *testing.F) { ... }
    • func ExamplePrintln() { ... }

  • https://pkg.go.dev/testing

• s4: coverage

  • go test -coverprofile cover.out ./...
  • go-cover-treemap -coverprofile cover.out > out.svg
  • microsoft/vscode-go#816
  • https://golang.org/doc/go1.10#test
  • go tool cover -html=cover.out -o cover.html
  • go tool cover -o cover2.html -html=cover.out; sed -i 's/black/whitesmoke/g' cover2.html; open cover2.html
  • mac: go tool cover -o cover2.html -html=cover.out; sed -i'.bak' 's/black/whitesmoke/g' cover2.html; rm -fr cover2.html.bak;open cover2.html

• s5: tools

  • assert/require
  • gocovery: Behavior-driven Development

• s6: mock

  • https://github.com/golang/mock

  • https://github.com/vektra/mockery

  • https://github.com/DATA-DOG/go-sqlmock

  • https://github.com/h2non/gock

  • https://github.com/gavv/httpexpect

  • https://github.com/steinfletcher/apitest

  • https://github.com/carlmjohnson/be

  • https://github.com/arikama/go-mysql-test-container

  • https://github.com/jfilipczyk/gomatch

  • monkey

    • https://github.com/bouk/monkey
    • https://github.com/agiledragon/gomonkey
      • printf '\x07' | dd of=api.test bs=1 seek=160 count=1 conv=notrunc
      • https://github.com/eisenxp/macos-golink-wrapper

  • container

    • https://github.com/testcontainers/testcontainers-go

• s7: web case

• dao

• service

• http

• s8: benchmark

• s9: example

• s10: fuzzing test

install tools

go install github.com/rakyll/gotest@master
go install github.com/axw/gocov/gocov@latest
go install github.com/matm/gocov-html@latest
go install github.com/nikolaydubina/go-cover-treemap@latest
// https://go-cover-treemap.io/