access-engine/cmd/flex-auth/main_test.go

package main

import (
	"os"
	"os/exec"
	"strings"
	"testing"
)

// The retired binary must fail and name its replacement, whatever it is asked.
func TestRetiredBinaryNamesReplacement(t *testing.T) {
	if os.Getenv("ACCESS_ENGINE_STUB_CHILD") == "1" {
		main()
		return
	}
	cmd := exec.Command(os.Args[0], "-test.run=TestRetiredBinaryNamesReplacement", "serve", "--addr", "x")
	cmd.Env = append(os.Environ(), "ACCESS_ENGINE_STUB_CHILD=1")
	out, err := cmd.CombinedOutput()
	exit, ok := err.(*exec.ExitError)
	if !ok || exit.ExitCode() != 2 {
		t.Fatalf("want exit 2, got %v", err)
	}
	if !strings.Contains(string(out), "renamed to access-engine") {
		t.Fatalf("missing rename message: %s", out)
	}
}