英文:
Golang unit testing user input
问题
我正在尝试以测试驱动开发（TDD）的思维方式学习Go语言。我在理解测试方面遇到了困难。
在下面的示例中，我提示用户输入，进行一些验证并打印结果。我为此编写了一个测试（测试通过），但我觉得它没有触发验证部分，所以我做错了什么。希望能得到一些建议。
package main
import (
"bufio"
"fmt"
"io"
"os"
"regexp"
"strings"
)
func main() {
response := askQuestion("What is your name?")
fmt.Printf("Hello %s\n", response)
}
func askQuestion(question string) string {
reader := bufio.NewReader(os.Stdin)
answer := ""
for {
fmt.Printf("%s\n", question)
input, err := reader.ReadString('\n')
if err != nil {
if err != io.EOF {
panic(err)
}
break
}
if regexp.MustCompile(`[A-Z]{5}`).MatchString(strings.TrimSpace(input)) == true {
answer = strings.TrimSpace(input)
fmt.Printf("You entered %s\n", answer)
break
} else {
fmt.Printf("3[31mYou must enter only 5 upper case letters.\n3[0m")
continue
}
}
return answer
}
package main
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"os"
"reflect"
"strings"
"testing"
)
func TestAskQuestion(t *testing.T) {
expected := "foo"
entered := "foo"
askQuestion("What is your last name?")
oldStdout := os.Stdout
r, w, _ := os.Pipe()
os.Stdout = w
fmt.Println(entered)
outC := make(chan string)
go func() {
var buf bytes.Buffer
io.Copy(&buf, r)
outC <- buf.String()
}()
w.Close()
os.Stdout = oldStdout
out := strings.TrimSpace(<-outC)
b, _ := ioutil.ReadAll(os.Stdin)
t.Log(string(b))
if !reflect.DeepEqual(expected, out) {
t.Fatalf("Test Status Failure Issue. Got: '%v' expected %s", out, expected)
}
}
以上是你提供的代码。
英文:
I am trying to learn go with a TDD mindset. I am stuck getting my head wrapped around testing.
In the example below, I am prompting a user for input, doing a little validation and printing the results. I wrote a test for it (which is passing) however I don't feel like it is hitting the validation portion, so I am doing something wrong. Any advice would be appreciated.
https://play.golang.org/p/FDpbof9Y20
package main
import (
"bufio"
"fmt"
"io"
"os"
"regexp"
"strings"
)
func main() {
response := askQuestion("What is your name?")
fmt.Printf("Hello %s\n",response)
}
func askQuestion(question string) string {
reader := bufio.NewReader(os.Stdin)
answer := ""
for {
fmt.Printf("%s\n", question)
input, err := reader.ReadString('\n')
if err != nil {
if err != io.EOF {
panic(err)
}
break
}
if regexp.MustCompile(`[A-Z]{5}`).MatchString(strings.TrimSpace(input)) == true {
answer = strings.TrimSpace(input)
fmt.Printf("You entered %s\n", answer)
break
} else {
fmt.Printf("3[31mYou must enter only 5 upper case letters.\n3[0m")
continue
}
}
return answer
}
https://play.golang.org/p/WcI4CRfle5
package main
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"os"
"reflect"
"strings"
"testing"
)
func TestAskQuestion(t *testing.T) {
expected := "foo"
entered := "foo"
askQuestion("What is your last name?")
oldStdout := os.Stdout
r, w, _ := os.Pipe()
os.Stdout = w
fmt.Println(entered)
outC := make(chan string)
go func() {
var buf bytes.Buffer
io.Copy(&buf, r)
outC <- buf.String()
}()
w.Close()
os.Stdout = oldStdout
out := strings.TrimSpace(<-outC)
b, _ := ioutil.ReadAll(os.Stdin)
t.Log(string(b))
if !reflect.DeepEqual(expected, out) {
t.Fatalf("Test Status Failure Issue. Got: '%v' expected %s", out, expected)
}
}
答案1
得分: 2
Go的测试需要放在以xyz_test.go命名的文件中，所以Playground不是熟悉单元测试功能的正确地方。
如果你在本地安装了Go，请运行命令go help test，以获得一个非常简要的介绍。
英文:
Go's tests need to live in files which are named xyz_test.go, so the playground is not the right place to familiarize yourself with the unit testing feature.
If you have go installed locally, run the command go help test, to get a very brief introduction.
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