test(internal/storage/null): add unit testing for null

Author: huhong-web

internal/storage/null/null_test.go

@@ -0,0 +1,81 @@
+// Copyright 2026 The HuaTuo Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package null
+
+import (
+	"reflect"
+	"testing"
+	"time"
+
+	"huatuo-bamai/internal/storage/types"
+)
+
+func TestStorageClientWrite(t *testing.T) {
+	tests := []struct {
+		name   string
+		client *StorageClient
+		doc    *types.Document
+	}{
+		{
+			name:   "nil document",
+			client: &StorageClient{},
+			doc:    nil,
+		},
+		{
+			name:   "empty document",
+			client: &StorageClient{},
+			doc:    &types.Document{},
+		},
+		{
+			name:   "filled document",
+			client: &StorageClient{},
+			doc: &types.Document{
+				Hostname:     "host-1",
+				Region:       "cn",
+				UploadedTime: time.Date(2026, 1, 1, 0, 0, 0, 0, time.UTC),
+				Time:         "2026-01-01 00:00:00.000 +0000",
+				TracerName:   "cpu",
+				TracerID:     "task-1",
+				TracerTime:   "2026-01-01 00:00:00.000 +0000",
+				TracerData:   "payload",
+			},
+		},
+		{
+			name:   "nil receiver",
+			client: nil,
+			doc: &types.Document{
+				TracerName: "memory",
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var before *types.Document
+			if tt.doc != nil {
+				snapshot := *tt.doc
+				before = &snapshot
+			}
+
+			if err := tt.client.Write(tt.doc); err != nil {
+				t.Errorf("Write() returned unexpected error: %v", err)
+			}
+
+			if before != nil && !reflect.DeepEqual(*before, *tt.doc) {
+				t.Errorf("Write() should not mutate input document, before=%+v, after=%+v", *before, *tt.doc)
+			}
+		})
+	}
+}