From c1c7eb006bb7a5172ad56da88af9f9048b3d3604 Mon Sep 17 00:00:00 2001
From: Developer <developer@example.com>
Date: Wed, 18 Mar 2026 16:19:03 +0800
Subject: [PATCH] chore: add ESLint, Prettier and Jest configuration

---
 .eslintignore                       |  7 ++++
 .eslintrc.js                        | 19 ++++++++++
 .prettierrc                         |  9 +++++
 jest.config.js                      |  6 ++++
 server/__tests__/validators.test.js | 55 +++++++++++++++++++++++++++++
 5 files changed, 96 insertions(+)
 create mode 100644 .eslintignore
 create mode 100644 .eslintrc.js
 create mode 100644 .prettierrc
 create mode 100644 jest.config.js
 create mode 100644 server/__tests__/validators.test.js

diff --git a/.eslintignore b/.eslintignore
new file mode 100644
index 0000000..aaed6a0
--- /dev/null
+++ b/.eslintignore
@@ -0,0 +1,7 @@
+node_modules/
+frontend/node_modules/
+frontend/.next/
+logs/
+*.log
+accountbook.db
+.worktrees/
diff --git a/.eslintrc.js b/.eslintrc.js
new file mode 100644
index 0000000..3267031
--- /dev/null
+++ b/.eslintrc.js
@@ -0,0 +1,19 @@
+module.exports = {
+  root: true,
+  env: {
+    node: true,
+    es2021: true,
+    jest: true,
+  },
+  extends: ['eslint:recommended'],
+  parserOptions: {
+    ecmaVersion: 'latest',
+    sourceType: 'module',
+  },
+  rules: {
+    'no-console': 'off',
+    'no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
+    'prefer-const': 'error',
+    'no-var': 'error',
+  },
+};
diff --git a/.prettierrc b/.prettierrc
new file mode 100644
index 0000000..2d30e11
--- /dev/null
+++ b/.prettierrc
@@ -0,0 +1,9 @@
+{
+  "semi": true,
+  "singleQuote": true,
+  "tabWidth": 2,
+  "trailingComma": "es5",
+  "printWidth": 100,
+  "bracketSpacing": true,
+  "arrowParens": "always"
+}
diff --git a/jest.config.js b/jest.config.js
new file mode 100644
index 0000000..7490637
--- /dev/null
+++ b/jest.config.js
@@ -0,0 +1,6 @@
+module.exports = {
+  testEnvironment: 'node',
+  roots: ['<rootDir>/server'],
+  testMatch: ['**/__tests__/**/*.test.js'],
+  verbose: true,
+};
diff --git a/server/__tests__/validators.test.js b/server/__tests__/validators.test.js
new file mode 100644
index 0000000..a4b3b19
--- /dev/null
+++ b/server/__tests__/validators.test.js
@@ -0,0 +1,55 @@
+const {
+  isNonEmptyString,
+  isValidMonth,
+  isValidDateTime,
+  validateRecordPayload,
+} = require('../utils/validators');
+
+describe('Validators', () => {
+  describe('isNonEmptyString', () => {
+    test('returns true for non-empty string', () => {
+      expect(isNonEmptyString('hello')).toBe(true);
+    });
+
+    test('returns false for empty string', () => {
+      expect(isNonEmptyString('')).toBe(false);
+    });
+
+    test('returns false for non-string', () => {
+      expect(isNonEmptyString(123)).toBe(false);
+      expect(isNonEmptyString(null)).toBe(false);
+    });
+  });
+
+  describe('isValidMonth', () => {
+    test('returns true for valid month format', () => {
+      expect(isValidMonth('2024-01')).toBe(true);
+    });
+
+    test('returns false for invalid month format', () => {
+      expect(isValidMonth('2024-1')).toBe(false);
+    });
+  });
+
+  describe('validateRecordPayload', () => {
+    test('returns null for valid payload', () => {
+      const payload = {
+        type: 'expense',
+        amount: 100,
+        category: '餐饮',
+        date: '2024-01-15',
+      };
+      expect(validateRecordPayload(payload)).toBeNull();
+    });
+
+    test('returns error for invalid type', () => {
+      const payload = {
+        type: 'invalid',
+        amount: 100,
+        category: '餐饮',
+        date: '2024-01-15',
+      };
+      expect(validateRecordPayload(payload)).toBe('账目类型错误');
+    });
+  });
+});