string_test.go

// Benchmark for https://github.com/wjh/beaver/issues/1
package main

import (
	"bytes"
	"fmt"
	"os"
	"strconv"
	"testing"
	"text/template"
)

var name = "Conrad"
var age = 18

// Output to match
// "Hello, My name is {name}. In 5 years I will be {age + 5} years old!"
var foo = ""

// built-in

func TestConcat(t *testing.T) {
	fmt.Println("Hello, My name is " + name + ". In 5 years I will be " + strconv.Itoa(age+5) + " years old!")
}

func BenchmarkConcat(b *testing.B) {
	for i := 0; i < b.N; i++ {
		// Ugly, long and often rejected for the neater looking fmt.Printf
		foo = "Hello, My name is " + name + ". In 5 years I will be " + strconv.Itoa(age+5) + " years old!"
		foo = ""
	}
}

// fmt

func TestSprintF(t *testing.T) {
	fmt.Println(fmt.Sprintf("Hello, My name is %v. In 5 years I will be %v years old!", name, age+5))
}

func BenchmarkSprintf(b *testing.B) {
	for i := 0; i < b.N; i++ {
		// Most common because of neatness.
		foo = fmt.Sprintf("Hello, My name is %v. In 5 years I will be %v years old!", name, age+5)
		foo = ""
	}
}

// text/template
// Not normally used but has similar formatting to the proposed formatting.
// Too powerful for what is required.

type data struct {
	Name string
	Age  int
}

var fooBuffer = &bytes.Buffer{}

var temp, _ = (&template.Template{}).Parse("Hello, My name is {{.Name}}. In 5 years I will be {{.Age}} years old!")

func TestTextTemplate(t *testing.T) {
	temp.Execute(os.Stdout, data{name, age + 5})
	fmt.Println()
}

func BenchmarkTextTemplate(b *testing.B) {
	for i := 0; i < b.N; i++ {
		temp.Execute(fooBuffer, data{name, age + 5})
		fooBuffer.Reset()
	}
}