Golang 1.18新特性模糊测试用法详解

func Reverse(str string) string {
	data := []byte(str)
	for i, j := 0, len(data)-1; i < len(data)/2; i, j = i+1, j-1 {
		data[i], data[j] = data[j], data[i]
	}
	return string(data)
}

func TestReverse(t *testing.T) {
	type TeseCase struct {
		Input    string
		Expected string
	}
	testcases := []TeseCase{
		{"hello", "olleh"},
		{"world", "dlrow"},
		{"earth", "htrae"},
	}
 
	for _, testcase := range testcases {
		actual := Reverse(testcase.Input)
		assert.Equal(t, testcase.Expected, actual)
	}
}

func FuzzReverse(f *testing.F) {
	var seeds = []string{"hello", "world", "earth"}
	for i := range seeds {
		f.Add(seeds[i])
	}
	f.Fuzz(func(t *testing.T, input string) {
		str1 := Reverse(input)
		str2 := Reverse(str1)
		if strings.EqualFold(input, str2) {
			t.Errorf("reverse failed! input: %s", input)
		}
	})
}

func FuzzReverse(f *testing.F) {
	var seeds = []string{"hello", "world", "earth"}
	for i := range seeds {
		f.Add(seeds[i])
	}
	f.Fuzz(func(t *testing.T, input string) {
		if input == "hello" || input == "world" || input == "earth" {
			return
		}
		str1 := Reverse(input)
		str2 := Reverse(str1)
		if strings.EqualFold(input, str2) {
			t.Errorf("reverse failed! input: %s", input)
		}
	})
}