How to use Sum method of example_test Package

Best Got code snippet using example_test.Sum

trace.go

Source:trace.go Github

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1package trace2import (3 "bytes"4 "fmt"5 "runtime"6 "strconv"7 "sync"8)9// 利用代码生成自动注入 Trace 函数10// 要实现向目标代码中的函数 / 方法自动注入 Trace 函数，首先要做的就是将 Trace 函数相关的代码打包到一个 module 中以方便其他 module 导入。11// 下面就先来看看将 Trace 函数放入一个独立的 module 中的步骤。12// 将 Trace 函数放入一个独立的 module 中13// 创建一个名为 instrument_trace 的目录，进入这个目录后，通过 go mod init 命令创建一个名为 github.com/lcy2013/instrument_trace 的 module：14// $mkdir instrument_trace15// $cd instrument_trace16// $go mod init github.com/lcy2013/instrument_trace17// 将最新版的 trace.go 放入到该目录下，将包名改为 trace，并仅保留 Trace 函数、Trace 使用的函数以及包级变量，其他函数一律删除掉。18//19// 作为 trace 包的作者，有义务告诉大家如何使用 trace 包。20// 在 Go 中，通常我们会用一个 example_test.go 文件来编写使用 trace 包的演示代码，21// 为 trace 包提供的 example_test.go 文件。22// 自动注入 Trace 函数23// 现在，在 instrument_trace module 下面增加一个命令行工具，这个工具可以以一个 Go 源文件为单位，自动向这个 Go 源文件中的所有函数注入 Trace 函数。24// 带有可执行文件的 Go 项目布局，在 instrument_trace module 中增加 cmd/instrument 目录，这个工具的 main 包就放在这个目录下，而真正实现自动注入 Trace 函数的代码呢，被我们放在了 instrumenter 目录下。25// $ tree ./instrument_trace26// ./instrument_trace27// ├── Makefile28// ├── cmd/29// │ └── instrument/30// │ └── main.go # instrument命令行工具的main包31// ├── example_test.go32// ├── go.mod33// ├── go.sum34// ├── instrumenter/ # 自动注入逻辑的相关结构35// │ ├── ast/36// │ │ └── ast.go37// │ └── instrumenter.go38// └── trace.go39// 先看 cmd/instrument/main.go 源码，然后自上而下沿着 main 函数的调用逻辑逐一看一下这个功能的实现。40// 不过，由于 http2curGoroutineID 不是一个导出函数，我们无法直接使用。可以把它复制出来改造一下：41var goroutineSpace = []byte("goroutine ")42// curGoroutineID 改造了两个地方。43// 一个地方是通过直接创建一个 byte 切片赋值给 b，替代原 http2curGoroutineID 函数中从一个 pool 池获取 byte 切片的方式，44// 另外一个是使用 strconv.ParseUint 替代了原先的 http2parseUintBytes。45// 改造后，就可以直接使用 curGoroutineID 函数来获取 Goroutine 的 ID 信息了。46func curGoroutineID() uint64 {47 b := make([]byte, 64)48 b = b[:runtime.Stack(b, false)]49 // Parse the 4707 out of "goroutine 4707 ["50 b = bytes.TrimPrefix(b, goroutineSpace)51 i := bytes.IndexByte(b, ' ')52 if i < 0 {53 panic(fmt.Sprintf("No space found in %q", b))54 }55 b = b[:i]56 n, err := strconv.ParseUint(string(b), 10, 64)57 if err != nil {58 panic(fmt.Sprintf("Failed to parse goroutine ID out of %q: %v", b, err))59 }60 return n61}62var mu sync.Mutex63var m = make(map[uint64]int)64// Trace 使用了一个 map 类型变量 m 来保存每个 Goroutine 当前的缩进信息：m 的 key 为 Goroutine 的 ID，值为缩进的层次。65// 然后，考虑到 Trace 函数可能在并发环境中运行，根据 map 不支持并发写的注意事项，增加了一个 sync.Mutex 实例 mu 用于同步对 m 的写操作。66// 对于一个 Goroutine 来说，每次刚进入一个函数调用，就在输出入口跟踪信息之前，将缩进层次加一，并输出入口跟踪信息，加一后的缩进层次值也保存到 map 中。67// 然后，在函数退出前，取出当前缩进层次值并输出出口跟踪信息，之后再将缩进层次减一后保存到 map 中。68// 除了增加缩进层次信息外，在这一版的 Trace 函数实现中，也把输出出入口跟踪信息的操作提取到了一个独立的函数 printTrace 中，这个函数会根据传入的 Goroutine ID、函数名、箭头类型与缩进层次值，按预定的格式拼接跟踪信息并输出。69func Trace() func() {70 // 通过 runtime.Caller 函数获得当前 Goroutine 的函数调用栈上的信息71 // runtime.Caller 的参数标识的是要获取的是哪一个栈帧的信息。72 // 当参数为 0 时，返回的是 Caller 函数的调用者的函数信息，在这里就是 Trace 函数。73 // 但我们需要的是 Trace 函数的调用者的信息，于是我们传入 1。74 //75 // Caller 函数有四个返回值：76 // 第一个返回值代表的是程序计数（pc）；77 // 第二个和第三个参数代表对应函数所在的源文件名以及所在行数，这里我们暂时不需要；78 // 最后一个参数代表是否能成功获取这些信息，如果获取失败，抛出 panic。79 pc, _, _, ok := runtime.Caller(1)80 if !ok {81 panic("not found caller")82 }83 // 通过 runtime.FuncForPC 函数和程序计数器（PC）得到被跟踪函数的函数名称。84 // runtime.FuncForPC 返回的名称中不仅仅包含函数名，还包含了被跟踪函数所在的包名。85 fn := runtime.FuncForPC(pc)86 // 获取上一个栈针的函数名称87 name := fn.Name()88 // 获取当前goroutine的信息89 gid := curGoroutineID()90 mu.Lock()91 indents := m[gid]92 m[gid] = indents + 193 mu.Unlock()94 printTrace(gid, name, "->", indents+1)95 return func() {96 mu.Lock()97 indent := m[gid]98 m[gid] = indent - 199 mu.Unlock()100 printTrace(gid, name, "<-", indent)101 }102}103// printTrace 格式化缩进输出104func printTrace(id uint64, name, arrow string, indent int) {105 indents := ""106 for i := 0; i < indent; i++ {107 indents = fmt.Sprintf("%s%s", indents, " ")108 }109 fmt.Printf("g[%05d]: %s%s%s\n", id, indents, arrow, name)110}...

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example_test.go

Source:example_test.go Github

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1/*2@Time : 11/21/21 21:143@Author : nil4@File : example_test.go5*/6package chaninvoke_test7import (8 "chaninvoke"9 "fmt"10 "testing"11 "time"12)13func TestExample(t *testing.T) {14 s := chaninvoke.StartServer(10)15 done := make(chan struct{})16 go func(){17 s.Register("f0", func(args ...interface{}) interface{}{18 sum := 019 for _, v := range args {20 sum += v.(int)21 }22 return interface{}(sum)23 })24 s.Register("f1", func(args ...int) int {25 product := 126 for _, v := range args {27 product *= v28 }29 return product30 })31 s.Register("f2", func(i, j string) string {32 return i+j33 })34 s.Register("f3", func(t int) int {35 time.Sleep(time.Second * time.Duration(t))36 fmt.Println("f3 end")37 return t38 })39 done <- struct{}{}40 for {41 s.Exec(<- s.CallChan)42 }43 }()44 fmt.Println("register done")45 <-done46 go func() {47 c := chaninvoke.StartClient(10, s)48 fmt.Println(c.Call("f0", 1, 2, 3, 4))49 fmt.Println(c.Call("f1", 1, 2, 3, 4))50 fmt.Println(c.Call("f1", 1))51 fmt.Println(c.Call("f2", "hello", "world"))52 c.AsyncCall("f3", 1, func(t int) {53 fmt.Printf("you finally awake, you sleep %d seconds\n", t)54 })55 c.Cb(<- c.AsyncRetChan)56 done <- struct{}{}57 }()58 <-done59}...

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04_suite_test.go

Source:04_suite_test.go Github

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...5 "github.com/ysmood/got"6 "github.com/ysmood/got/lib/example"7)8func TestSuite(t *testing.T) {9 // Execute each exported methods of SumSuite.10 // Each exported methods on SumSuite is a test case.11 got.Each(t, SumSuite{})12}13type SumSuite struct {14 got.G15}16func (g SumSuite) Sum() {17 g.Eq(example.Sum("1", "1"), "2")18}19func TestSumAdvancedSuite(t *testing.T) {20 // The got.Each can also accept a function to init the g for each test case.21 got.Each(t, func(t *testing.T) SumAdvancedSuite {22 g := got.New(t)23 // Concurrently run each test24 g.Parallel()25 // Timeout for each test26 g.PanicAfter(time.Second)27 return SumAdvancedSuite{g, "1", "2"}28 })29}30type SumAdvancedSuite struct {31 got.G32 a, b string33}34func (g SumAdvancedSuite) Sum() {35 g.Eq(example.Sum(g.a, g.b), "3")36}

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Sum

Using AI Code Generation

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1import (2func main() {3 fmt.Println("Hello, playground")4 fmt.Println(example.Sum(1,2))5}6import "testing"7func TestSum(t *testing.T) {8 if Sum(1,2) != 3 {9 t.Error("Expected 3")10 }11}12import "testing"13func TestSum(t *testing.T) {14 if Sum(1,2) != 3 {15 t.Error("Expected 3")16 }17}18func Sum(a int, b int) int {19}20--- PASS: TestSum (0.00s)21--- PASS: TestSum (0.00s)22--- PASS: TestSum (0.00s)23--- PASS: TestSum (0.00s)

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Sum

Using AI Code Generation

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1import "fmt"2func main() {3 fmt.Println(x.Sum())4}5import "fmt"6type example_test struct {7}8func (x example_test) Sum() int {9}10func main() {11 fmt.Println(x.Sum())12}13import "fmt"14type example_test struct {15}16func (x *example_test) Sum() int {17}18func main() {19 fmt.Println(x.Sum())20}21import "fmt"22type example_test struct {23}

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Sum

Using AI Code Generation

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1func main() {2 var example = example_test.Example{}3 fmt.Println(example.Sum(1, 2))4}5type Example struct{}6func (e Example) Sum(a, b int) int {7}

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Sum

Using AI Code Generation

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1import (2func main() {3 fmt.Println(hello.Sum(1, 2))4}5import (6func main() {7 fmt.Println(hello.Sum(1, 2))8 fmt.Println(world.Multiply(2, 3))9}10import (11func main() {12 fmt.Println(hello.Sum(1, 2))13 fmt.Println(world.Multiply(2, 3))14}15import (16func main() {17 fmt.Println(hello.Sum(1, 2))18 fmt.Println(world.Multiply(2, 3))19}

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Sum

Using AI Code Generation

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1import (2func main() {3 fmt.Println(example_test.Sum(5, 6))4}5import (6func Sum(a int, b int) int {7}8func TestSum(t *testing.T) {9 if Sum(5, 6) != 11 {10 t.Error("Expected 11, got ", Sum(5, 6))11 }12}13import (14func Sum(a int, b int) int {15}16func TestSum(t *testing.T) {17 if Sum(5, 6) != 11 {18 t.Error("Expected 11, got ", Sum(5, 6))19 }20}21func BenchmarkSum(b *testing.B) {22 for i := 0; i < b.N; i++ {23 Sum(5, 6)24 }25}26import (27func Sum(a int, b int) int {28}29func TestSum(t *testing.T) {30 t.Run("5+6=11", func(t *testing.T) {31 if Sum(5, 6) != 11 {32 t.Error("Expected 11, got ", Sum(5, 6))33 }34 })35 t.Run("0+0=0", func(t *testing.T) {36 if Sum(0, 0) != 0 {37 t.Error("Expected 0, got ", Sum(0, 0))38 }39 })40}41import (42func Sum(a int, b int) int {

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Sum

Using AI Code Generation

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1import (2func main() {3 fmt.Println(example.Sum(10, 20))4}5import "testing"6func TestSum(t *testing.T) {7 if Sum(10, 20) != 30 {8 t.Error("Sum(10, 20) should be 30")9 }10}11import "testing"12func TestSum(t *testing.T) {13 if Sum(10, 20) != 30 {14 t.Error("Sum(10, 20) should be 30")15 }16}17func TestSum2(t *testing.T) {18 if Sum(10, 20) != 30 {19 t.Error("Sum(10, 20) should be 30")20 }21}22import "testing"23func TestSum(t *testing.T) {24 if Sum(10, 20) != 30 {25 t.Error("Sum(10, 20) should be 30")26 }27}28func TestSum2(t *testing.T) {29 if Sum(10, 20) != 30 {30 t.Error("Sum(10, 20) should be 30")31 }32}33func TestSum3(t *testing.T) {34 if Sum(10, 20) != 30 {35 t.Error("Sum(10, 20) should be 30")36 }37}38import "testing"39func TestSum(t *testing.T) {40 if Sum(10, 20) != 30 {41 t.Error("Sum(10, 20) should be 30")42 }43}44func TestSum2(t *testing.T) {45 if Sum(10, 20) != 30 {46 t.Error("Sum(10, 20) should be

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