blob: b67bce7c4b4982b2b5d71299effe5d20806fea14 [file] [log] [blame]
// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
func TestMain(t *testing.T) {
checkOutput(t, "greeting.go", "Hello, Gophers!\n")
// checkOutput from running a program against expectations.
func checkOutput(t *testing.T, file, expected string) {
actual := runCmd(t, file)
if expected != actual {
t.Errorf("Expected output %q, got %q.", expected, actual)
// runCmd a program and capture the output.
func runCmd(t *testing.T, file string) string {
out, err := exec.Command("go", "run", file).Output()
if e, ok := err.(*exec.ExitError); ok {
t.Fatalf("unsuccessful exit: %s", e.Stderr)
} else if err != nil {
t.Fatalf("%s", err)
return string(out)