feat: backend service

integration/testenv/geoip.go

@@ -0,0 +1,57 @@
+package testenv
+
+import (
+	"io"
+	"os"
+	"path/filepath"
+	"runtime"
+	"testing"
+)
+
+// SyntheticGeoIPDB copies the MaxMind reference Country test database
+// into a fresh temp directory and returns the absolute path. The same
+// fixture is used by pkg/geoip tests, so all integration tests resolve
+// the same set of synthetic IPs against the same country mapping.
+func SyntheticGeoIPDB(t *testing.T) string {
+	t.Helper()
+	src := geoipFixturePath(t)
+	data, err := os.ReadFile(src)
+	if err != nil {
+		t.Fatalf("read mmdb fixture %s: %v", src, err)
+	}
+	dst := filepath.Join(t.TempDir(), "GeoIP2-Country-Test.mmdb")
+	if err := os.WriteFile(dst, data, 0o644); err != nil {
+		t.Fatalf("write mmdb fixture: %v", err)
+	}
+	return dst
+}
+
+func geoipFixturePath(t *testing.T) string {
+	t.Helper()
+	_, file, _, ok := runtime.Caller(0)
+	if !ok {
+		t.Fatalf("runtime.Caller failed")
+	}
+	// integration/testenv/geoip.go → workspace/pkg/geoip/...
+	root := filepath.Dir(filepath.Dir(filepath.Dir(file)))
+	return filepath.Join(root, "pkg", "geoip", "test-data", "test-data", "GeoIP2-Country-Test.mmdb")
+}
+
+// CopyFile copies src into dst with mode 0644. Convenience helper for
+// container bind-mount preparation.
+func CopyFile(src, dst string) error {
+	in, err := os.Open(src)
+	if err != nil {
+		return err
+	}
+	defer in.Close()
+	out, err := os.Create(dst)
+	if err != nil {
+		return err
+	}
+	defer out.Close()
+	if _, err := io.Copy(out, in); err != nil {
+		return err
+	}
+	return out.Chmod(0o644)
+}