docs & feat: add license & attribution notice (Apache-2.0 / GPL-3.0) and core system enhancements

internal/gameserver/test_helpers_test.go

@@ -2,12 +2,15 @@ package gameserver
 
 import (
 	"fmt"
+	"gac-hkrpg-go/internal/testutil"
 	"os"
 	"path/filepath"
 	"runtime"
 	"testing"
 )
 
+var testWorkspaceRoot string
+
 func TestMain(m *testing.M) {
 	_, source, _, ok := runtime.Caller(0)
 	if !ok {
@@ -15,11 +18,22 @@ func TestMain(m *testing.M) {
 		os.Exit(2)
 	}
 	root := filepath.Clean(filepath.Join(filepath.Dir(source), "..", ".."))
-	if err := os.Chdir(root); err != nil {
+	temporary, err := os.MkdirTemp("", "gac-gameserver-tests-")
+	if err != nil {
+		panic(err)
+	}
+	if err := testutil.CopyRuntime(root, temporary); err != nil {
+		panic(err)
+	}
+	testWorkspaceRoot = temporary
+	if err := os.Chdir(temporary); err != nil {
 		fmt.Fprintf(os.Stderr, "cannot change to repository root %s: %v\n", root, err)
 		os.Exit(2)
 	}
-	os.Exit(m.Run())
+	code := m.Run()
+	_ = os.Chdir(root)
+	_ = os.RemoveAll(temporary)
+	os.Exit(code)
 }
 
 func chdirRepositoryRoot(t *testing.T) {
@@ -32,5 +46,5 @@ func chdirRepositoryRoot(t *testing.T) {
 	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)
+	t.Chdir(testWorkspaceRoot)
 }