testing
最后更新于：2022-04-02 02:46:16
[TOC]
## 语法
### Func
基本都不常用
```
func AllocsPerRun(runs int, f func()) (avg float64)
func CoverMode() string
func Coverage() float64
func Init()
func Main(matchString func(pat, str string) (bool, error), tests []InternalTest, ...)
func RegisterCover(c Cover)
func RunBenchmarks(matchString func(pat, str string) (bool, error), ...)
func RunExamples(matchString func(pat, str string) (bool, error), examples []InternalExample) (ok bool)
func RunTests(matchString func(pat, str string) (bool, error), tests []InternalTest) (ok bool)
func Short() bool
func Verbose() bool
```
### Type
```
type B
func (c *B) Cleanup(f func())
//在第一次调用后,和执行完后执行
func (c *B) Error(args ...interface{})
func (c *B) Errorf(format string, args ...interface{})
func (c *B) Fail()
func (c *B) FailNow() // 停止并标记为失败
func (c *B) Failed() bool // 是否失败
func (c *B) Fatal(args ...interface{})
func (c *B) Fatalf(format string, args ...interface{})
func (c *B) Log(args ...interface{})
func (c *B) Logf(format string, args ...interface{})
func (c *B) Helper()
func (c *B) Name() string // 测试函数名
// 打开当前基准测试的内存统计功能，
// 与使用 -test.benchmem 设置类似，但 ReportAllocs 只影响那些调用了该函数的基准测试
func (b *B) ReportAllocs()
func (b *B) ReportMetric(n float64, unit string)
func (b *B) Run(name string, f func(b *B)) bool // 运行子程序
// 以并行的方式执行给定的基准测试。 RunParallel 会创建出多个 goroutine
// 其中 goroutine 数量的默认值为 GOMAXPROCS
func (b *B) RunParallel(body func(*PB))
// 将 RunParallel 使用的 goroutine 数量设置为 p*GOMAXPROCS
func (b *B) SetParallelism(p int)
// 单个操作中处理的字节数, 基准测试将会报告 ns/op 以及 MB/s
func (b *B) SetBytes(n int64)
// 跳过测试,并调用日志
func (c *B) Skip(args ...interface{})
func (c *B) SkipNow()
func (c *B) Skipf(format string, args ...interface{})
func (c *B) Skipped() bool // 是否跳过
// StartTimer 和 StopTimer 控制时间
func (b *B) StartTimer()
func (b *B) StopTimer()
func (b *B) ResetTimer() // 清除 ns/op 数
type PB
func (pb *PB) Next() bool
type T
func (c *T) Cleanup(f func())
func (t *T) Deadline() (deadline time.Time, ok bool)
func (c *T) Error(args ...interface{})
func (c *T) Errorf(format string, args ...interface{})
func (c *T) Log(args ...interface{})
func (c *T) Logf(format string, args ...interface{})
func (c *T) Fatal(args ...interface{})
func (c *T) Fatalf(format string, args ...interface{})
func (c *T) Fail()
func (c *T) FailNow()
func (c *T) Failed() bool
func (c *T) Helper()
func (c *T) Name() string
func (t *T) Parallel() // 并行测试
func (t *T) Run(name string, f func(t *T)) bool
func (c *T) Skip(args ...interface{})
func (c *T) SkipNow()
func (c *T) Skipf(format string, args ...interface{})
func (c *T) Skipped() bool
```
## 实例
### RunParallel 并行测试
```
func BenchmarkHello(b *testing.B) {
templ := template.Must(template.New("test").Parse("Hello, {{.}}!"))
// RunParallel will create GOMAXPROCS goroutines
// and distribute work among them.
b.RunParallel(func(pb *testing.PB) {
// Each goroutine has its own bytes.Buffer.
var buf bytes.Buffer
for pb.Next() {
// The loop body is executed b.N times total across all goroutines.
buf.Reset()
templ.Execute(&buf, "World")
}
})
}
```
### SetBytes
设置n=1 为一次操作,
```
func Benchmark_Api(b *testing.B) {
b.SetBytes(1)
for i := 0; i < b.N; i++ {
Hello()
}
}
// output:
// Benchmark_Api-4 1000000000 0.341 ns/op 2932.28 MB/s
```
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