test: add test case

Author: xile611

package-lock.json

@@ -27,20 +27,57 @@
     "build": "tsc && node -e \"require('fs').chmodSync('build/index.js', '755')\"",
     "prepare": "npm run build",
     "watch": "tsc --watch",
+    "test": "jest",
+    "test:watch": "jest --watch",
+    "test:coverage": "jest --coverage",
+    "test:unit": "jest --testPathPattern=unit",
+    "test:integration": "jest --testPathPattern=integration",
     "test-tool": "node -e \"const { generateChartByType } = require('./build/utils/generateChart'); generateChartByType('area', { dataTable: [{x:'A',y:10}], xField:'x', yField:'y', chartOutput:'image' }).then(console.log);\"",
     "inspector": "npx @modelcontextprotocol/inspector build/index.js"
   },
   "dependencies": {
+    "@modelcontextprotocol/sdk": "^1.12.0",
     "@visactor/generate-vchart": "^2.0.7",
     "@visactor/vutils": "^1.0.7",
+    "axios": "^1.10.0",
+    "undici": "^7.11.0",
     "zod": "^3.25.32",
-    "zod-to-json-schema": "^3.24.5",
-    "@modelcontextprotocol/sdk": "^1.12.0",
-    "axios": "^1.10.0"
+    "zod-to-json-schema": "^3.24.5"
   },
   "devDependencies": {
+    "@jest/globals": "^30.0.4",
     "@modelcontextprotocol/inspector": "^0.15.0",
+    "@types/jest": "^29.5.12",
     "@types/node": "^20.11.24",
+    "jest": "^29.7.0",
+    "ts-jest": "^29.1.2",
     "typescript": "^5.3.3"
+  },
+  "jest": {
+    "preset": "ts-jest",
+    "testEnvironment": "node",
+    "roots": [
+      "<rootDir>/src",
+      "<rootDir>/tests"
+    ],
+    "testMatch": [
+      "**/__tests__/**/*.test.ts",
+      "**/?(*.)+(spec|test).ts"
+    ],
+    "collectCoverageFrom": [
+      "src/**/*.ts",
+      "!src/**/*.d.ts",
+      "!src/index.ts"
+    ],
+    "coverageDirectory": "coverage",
+    "coverageReporters": [
+      "text",
+      "lcov",
+      "html"
+    ],
+    "setupFilesAfterEnv": [
+      "<rootDir>/tests/setup.ts"
+    ],
+    "testTimeout": 30000
   }
 }