package gameserver

import (
	"fmt"
	"os"
	"path/filepath"
	"runtime"
	"testing"
)

func TestMain(m *testing.M) {
	_, source, _, ok := runtime.Caller(0)
	if !ok {
		fmt.Fprintln(os.Stderr, "cannot locate gameserver test helper source")
		os.Exit(2)
	}
	root := filepath.Clean(filepath.Join(filepath.Dir(source), "..", ".."))
	if err := os.Chdir(root); err != nil {
		fmt.Fprintf(os.Stderr, "cannot change to repository root %s: %v\n", root, err)
		os.Exit(2)
	}
	os.Exit(m.Run())
}

func chdirRepositoryRoot(t *testing.T) {
	t.Helper()
	_, source, _, ok := runtime.Caller(0)
	if !ok {
		t.Fatal("cannot locate gameserver test helper source")
	}
	root := filepath.Clean(filepath.Join(filepath.Dir(source), "..", ".."))
	if _, err := os.Stat(filepath.Join(root, "go.mod")); err != nil {
		t.Fatalf("cannot locate repository root from %s: %v", source, err)
	}
	t.Chdir(root)
}