Add unit tests for processChatTimeFilter function in chat utils

Bumps [tar-fs](https://github.com/mafintosh/tar-fs) from 3.0.8 to 3.0.9.
- [Commits](https://github.com/mafintosh/tar-fs/compare/v3.0.8...v3.0.9)

---
updated-dependencies:
- dependency-name: tar-fs
  dependency-version: 3.0.9
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

plugins/webcrawler/SPIDER/package-lock.json

@@ -4992,9 +4992,10 @@
       }
     },
     "node_modules/tar-fs": {
-      "version": "3.0.8",
-      "resolved": "https://registry.npmmirror.com/tar-fs/-/tar-fs-3.0.8.tgz",
-      "integrity": "sha512-ZoROL70jptorGAlgAYiLoBLItEKw/fUxg9BSYK/dF/GAGYFJOJJJMvjPAKDJraCXFwadD456FCuvLWgfhMsPwg==",
+      "version": "3.0.9",
+      "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-3.0.9.tgz",
+      "integrity": "sha512-XF4w9Xp+ZQgifKakjZYmFdkLoSWd34VGKcsTCwlNWM7QG3ZbaxnTsaBwnjFZqHRf/rROxaR8rXnbtwdvaDI+lA==",
+      "license": "MIT",
       "dependencies": {
         "pump": "^3.0.0",
         "tar-stream": "^3.1.5"

test/cases/service/core/chat/utils.test.ts

@@ -0,0 +1,128 @@
+import { describe, it, expect } from 'vitest';
+import { processChatTimeFilter } from '@/service/core/chat/utils';
+import type { DatasetCiteItemType } from '@fastgpt/global/core/dataset/type';
+
+describe('processChatTimeFilter', () => {
+  const baseTime = new Date('2025-01-01');
+
+  it('should return original item if no history', () => {
+    const item: DatasetCiteItemType = {
+      id: '1',
+      q: 'original q',
+      a: 'original a',
+      updateTime: baseTime.getTime(),
+      history: undefined
+    };
+
+    const result = processChatTimeFilter([item], baseTime);
+    expect(result).toEqual([item]);
+  });
+
+  it('should return original item if updateTime <= chatTime', () => {
+    const item: DatasetCiteItemType = {
+      id: '1',
+      q: 'original q',
+      a: 'original a',
+      updateTime: baseTime.getTime() - 1000,
+      history: [
+        {
+          q: 'history q',
+          a: 'history a',
+          updateTime: baseTime.getTime() - 2000
+        }
+      ]
+    };
+
+    const result = processChatTimeFilter([item], baseTime);
+    expect(result).toEqual([item]);
+  });
+
+  it('should return history item if one exists before chatTime', () => {
+    const item: DatasetCiteItemType = {
+      id: '1',
+      q: 'original q',
+      a: 'original a',
+      updateTime: baseTime.getTime() + 2000,
+      history: [
+        {
+          q: 'history q',
+          a: 'history a',
+          updateTime: baseTime.getTime() - 1000
+        }
+      ]
+    };
+
+    const result = processChatTimeFilter([item], baseTime);
+    expect(result).toEqual([
+      {
+        ...item,
+        q: 'history q',
+        a: 'history a',
+        updateTime: baseTime.getTime() - 1000,
+        updated: true
+      }
+    ]);
+  });
+
+  it('should return original item if no history before chatTime', () => {
+    const item: DatasetCiteItemType = {
+      id: '1',
+      q: 'original q',
+      a: 'original a',
+      updateTime: baseTime.getTime() + 2000,
+      history: [
+        {
+          q: 'history q',
+          a: 'history a',
+          updateTime: baseTime.getTime() + 1000
+        }
+      ]
+    };
+
+    const result = processChatTimeFilter([item], baseTime);
+    expect(result).toEqual([item]);
+  });
+
+  it('should handle multiple items', () => {
+    const items: DatasetCiteItemType[] = [
+      {
+        id: '1',
+        q: 'original q1',
+        a: 'original a1',
+        updateTime: baseTime.getTime() + 2000,
+        history: [
+          {
+            q: 'history q1',
+            a: 'history a1',
+            updateTime: baseTime.getTime() - 1000
+          }
+        ]
+      },
+      {
+        id: '2',
+        q: 'original q2',
+        a: 'original a2',
+        updateTime: baseTime.getTime() - 1000,
+        history: [
+          {
+            q: 'history q2',
+            a: 'history a2',
+            updateTime: baseTime.getTime() - 2000
+          }
+        ]
+      }
+    ];
+
+    const result = processChatTimeFilter(items, baseTime);
+    expect(result).toEqual([
+      {
+        ...items[0],
+        q: 'history q1',
+        a: 'history a1',
+        updateTime: baseTime.getTime() - 1000,
+        updated: true
+      },
+      items[1]
+    ]);
+  });
+});