Add unit tests

Author: igorjs

.eslintrc

@@ -0,0 +1,119 @@
+name: Test and Lint
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run linter
+        run: npm run lint
+
+  test:
+    name: Test (Node ${{ matrix.node-version }} on ${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        node-version: [20.x, 22.x]
+        exclude:
+          # Exclude some combinations to save CI time
+          - os: windows-latest
+            node-version: 22.x
+          - os: macos-latest
+            node-version: 22.x
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run tests with coverage
+        run: npm run test:coverage
+
+      - name: Upload coverage to Codecov
+        if: matrix.os == 'ubuntu-latest' && matrix.node-version == '20.x'
+        uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: ./coverage/lcov.info
+          fail_ci_if_error: false
+          verbose: true
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    needs: [lint, test]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build
+        run: npm run build
+
+      - name: Verify build succeeded
+        run: |
+          if [ ! -f "dist/index.js" ]; then
+            echo "::error::Build failed - dist/index.js not found"
+            exit 1
+          fi
+          echo "Build completed successfully"
+
+  # This job is used as a required check in branch protection rules
+  ci-status:
+    name: CI Status
+    runs-on: ubuntu-latest
+    needs: [lint, test, build]
+    if: always()
+
+    steps:
+      - name: Check CI status
+        run: |
+          if [[ "${{ needs.lint.result }}" == "failure" || "${{ needs.test.result }}" == "failure" || "${{ needs.build.result }}" == "failure" ]]; then
+            echo "::error::One or more CI jobs failed"
+            exit 1
+          fi
+          echo "All CI checks passed successfully"

.github/workflows/test-and-lint.yml

@@ -1,5 +1,7 @@
 # Clean Workflow Action
 
+[![Test and Lint](https://github.com/igorjs/gh-actions-clean-workflow/actions/workflows/test-and-lint.yml/badge.svg)](https://github.com/igorjs/gh-actions-clean-workflow/actions/workflows/test-and-lint.yml)
+
 Clean workflow run logs based on configuration.
 
 ## Usage

README.md

@@ -1,16 +1,78 @@
 const js = require("@eslint/js");
+const tsPlugin = require("@typescript-eslint/eslint-plugin");
+const tsParser = require("@typescript-eslint/parser");
+const globals = require("globals");
+
+// Available global sets from the globals package:
+// - globals.browser - Browser environment globals
+// - globals.node - Node.js globals (includes CommonJS)
+// - globals.nodeBuiltin - Node.js built-ins only (no CommonJS)
+// - globals.es2015 to globals.es2025 - ECMAScript globals by year
+// - globals.jest, globals.mocha, globals.jasmine, globals.vitest - Testing frameworks
+// - globals.commonjs - CommonJS specific (require, module, exports)
+// - globals.worker - Web Worker environment
+// - globals.serviceworker - Service Worker environment
+// - globals.jquery - jQuery globals
+// - globals['shared-node-browser'] - Shared between Node.js and browsers
 
 module.exports = [
+  // Base JavaScript configuration
+  js.configs.recommended,
+
+  // JavaScript files configuration
   {
+    files: ["**/*.js"],
     languageOptions: {
+      ecmaVersion: 2022,
+      sourceType: "module",
       globals: {
-        console: "readonly",
-        process: "readonly",
+        ...globals.node,
+        ...globals.es2021,
       },
     },
   },
+
+  // TypeScript configuration
   {
-    ignores: [".github/**", "dist/**", "node_modules/**"],
+    files: ["**/*.ts"],
+    languageOptions: {
+      parser: tsParser,
+      parserOptions: {
+        ecmaVersion: 2022,
+        sourceType: "module",
+        project: "./tsconfig.json",
+      },
+      globals: {
+        ...globals.node,
+        ...globals.es2021,
+        ...globals.jest,
+      },
+    },
+    plugins: {
+      "@typescript-eslint": tsPlugin,
+    },
+    rules: {
+      ...tsPlugin.configs.recommended.rules,
+      "@typescript-eslint/no-explicit-any": "warn",
+      "@typescript-eslint/no-unused-vars": [
+        "error",
+        { argsIgnorePattern: "^_" },
+      ],
+      "no-unused-vars": "off", // Turn off base rule as it's handled by TypeScript
+    },
+  },
+
+  // Ignore patterns
+  {
+    ignores: [
+      ".github/**",
+      "dist/**",
+      "node_modules/**",
+      "coverage/**",
+      "*.config.js",
+      "*.config.ts",
+      "**/*.test.ts",
+      "**/*.spec.ts",
+    ],
   },
-  js.configs.recommended,
 ];

dist/index.js

@@ -0,0 +1,26 @@
+import type { Config } from "jest";
+
+const config: Config = {
+  preset: "ts-jest",
+  testEnvironment: "node",
+  roots: ["<rootDir>/src"],
+  testMatch: ["**/*.test.ts"],
+  collectCoverageFrom: [
+    "src/**/*.ts",
+    "!src/**/*.d.ts",
+    "!src/**/__tests__/**",
+  ],
+  coverageThreshold: {
+    global: {
+      branches: 80,
+      functions: 80,
+      lines: 80,
+      statements: 80,
+    },
+  },
+  clearMocks: true,
+  restoreMocks: true,
+  maxWorkers: 1, // Run tests sequentially
+};
+
+export default config;