Go - appending issue - Slice - Underlying arrays, append関数

Head First Go
楽天ブックス 紀伊國屋書店

開発環境

• macOS Mojave - Apple (OS)
• Emacs (Text Editor)
• Windows 10 Pro (OS)
• Visual Studio Code (Text Editor)
• Go (プログラミング言語)

Head First Go (Jay McGavren(著)、O'Reilly Media)のChapter 6(appending issue - Slice)、Exercise(191)の解答を求めてみる。

コード

sample2_test.go

package main

import "testing"

func TestSlice(t *testing.T) {
 array := [5]string{"a", "b", "c", "d", "e"}
 slice := array[1:3]
 slice = append(slice, "x")
 slice = append(slice, "y", "z")

 wants := []string{"b", "c", "x", "y", "z"}
 for i, got := range slice {
  want := wants[i]
  if got != want {
   t.Errorf("slice[%d] = %s, want %s", i, got, want)
  }
 }
}

sample2.go

package main

func main() {}

入出力結果(Bash、cmd.exe(コマンドプロンプト)、Terminal)

$ go test
PASS
ok   _/.../Head_First_Go/ch6/sample2 0.005s
$