chore: initial import

pkg/errors/errors_test.go

@@ -0,0 +1,45 @@
+package errors
+
+import (
+	"errors"
+	"testing"
+)
+
+func TestAppErrorErrorIncludesCodeAndMessage(t *testing.T) {
+	err := &AppError{Code: "OPS_TEST", Message: "failed"}
+	if got := err.Error(); got != "[OPS_TEST] failed" {
+		t.Fatalf("unexpected error string: %s", got)
+	}
+}
+
+func TestWithDetailReturnsCopyWithoutMutatingBase(t *testing.T) {
+	detail := map[string]any{"field": "name"}
+	err := ErrBadRequest.WithDetail(detail)
+
+	if err == ErrBadRequest {
+		t.Fatal("expected a copy, got original pointer")
+	}
+	if err.Code != ErrBadRequest.Code || err.HTTPStatus != ErrBadRequest.HTTPStatus || err.Message != ErrBadRequest.Message {
+		t.Fatalf("metadata not preserved: %+v", err)
+	}
+	if err.Detail["field"] != "name" {
+		t.Fatalf("detail not attached: %+v", err.Detail)
+	}
+	if ErrBadRequest.Detail != nil {
+		t.Fatalf("base error was mutated: %+v", ErrBadRequest.Detail)
+	}
+}
+
+func TestWrap(t *testing.T) {
+	if Wrap(nil, ErrInternal) != nil {
+		t.Fatal("nil input should return nil")
+	}
+
+	wrapped := Wrap(errors.New("boom"), ErrInternal)
+	if wrapped.Code != ErrInternal.Code || wrapped.HTTPStatus != ErrInternal.HTTPStatus {
+		t.Fatalf("metadata not preserved: %+v", wrapped)
+	}
+	if wrapped.Message != "内部服务错误: boom" {
+		t.Fatalf("unexpected message: %s", wrapped.Message)
+	}
+}