diff --git a/.inscode b/.inscode
index ecc8bdde946f464a2c4d431d8f8196413737d922..c569fd6e84d32ab9ae224a33d637d9e83f599487 100644
--- a/.inscode
+++ b/.inscode
@@ -1,6 +1,10 @@
-run = "npm i && npm run dev"
+run = "npm i && npm run test"
+language = "node"
 
 [env]
 PATH = "/root/${PROJECT_DIR}/.config/npm/node_global/bin:/root/${PROJECT_DIR}/node_modules/.bin:${PATH}"
 XDG_CONFIG_HOME = "/root/.config"
-npm_config_prefix = "/root/${PROJECT_DIR}/.config/npm/node_global"
\ No newline at end of file
+npm_config_prefix = "/root/${PROJECT_DIR}/.config/npm/node_global"
+
+[debugger]
+program = "main.js"
diff --git a/babel.config.js b/babel.config.js
new file mode 100644
index 0000000000000000000000000000000000000000..32b35df80120d83c84a4b5aba082cc4b69469ea2
--- /dev/null
+++ b/babel.config.js
@@ -0,0 +1,3 @@
+module.exports = {
+  presets: [['@babel/preset-env', {targets: {node: 'current'}}]],
+};
\ No newline at end of file
diff --git a/index.js b/index.js
index 2d7e6834fb6366b3120c7a37cc5f637bc4a33928..c420ef836ad1e03203e4e4adfc6da23fa4261eca 100644
--- a/index.js
+++ b/index.js
@@ -1 +1,6 @@
-console.log("欢迎来到 InsCode");
\ No newline at end of file
+
+import {round} from 'lodash-es'
+
+export function fixed(a) {
+    return round(a)
+}
diff --git a/index.test.js b/index.test.js
new file mode 100644
index 0000000000000000000000000000000000000000..7cc7592454192f27f05e8744d46fdbc94e588982
--- /dev/null
+++ b/index.test.js
@@ -0,0 +1,6 @@
+// const sum = require('./index')
+import { fixed } from './index'
+
+test('fixed 2', () => {
+    expect(fixed(2)).toBe(2.00);
+});
\ No newline at end of file
diff --git a/package.json b/package.json
index 72caa1750a1c44c18460a496d258fbd3c51c673a..5811c7b7421070fb3c769e7ab37bc0150c4df665 100644
--- a/package.json
+++ b/package.json
@@ -4,15 +4,21 @@
     "description": "",
     "main": "index.js",
     "scripts": {
-      "dev": "node index.js",
-      "test": "echo \"Error: no test specified\" && exit 1"
+        "dev": "node index.js",
+        "test": "jest"
     },
     "keywords": [],
     "author": "",
     "license": "ISC",
     "dependencies": {
-      "@types/node": "^18.0.6",
-      "node-fetch": "^3.2.6"
+        "@types/node": "^18.0.6",
+        "lodash-es": "^4.17.21",
+        "node-fetch": "^3.2.6"
+    },
+    "devDependencies": {
+        "@babel/core": "^7.25.2",
+        "@babel/preset-env": "^7.25.4",
+        "babel-jest": "^29.7.0",
+        "jest": "^29.7.0"
     }
-  }
-  
\ No newline at end of file
+}
diff --git a/sum.js b/sum.js
new file mode 100644
index 0000000000000000000000000000000000000000..28e61dddcec5d511f7afd90ecd0a5cd311fcda49
--- /dev/null
+++ b/sum.js
@@ -0,0 +1,3 @@
+export const sum = (a, b) => {
+    return a + b
+}
\ No newline at end of file