test: add unit tests generated by ToTheos

coverage/coverage-summary.json

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+}

jest.config.js

@@ -0,0 +1,21 @@
+import { createDefaultPreset } from 'ts-jest'
+
+const tsJestTransformCfg = createDefaultPreset().transform
+
+/** @type {import("jest").Config} **/
+export default {
+  testEnvironment: 'node',
+  transform: {
+    '^.+\\.ts$': [
+      'ts-jest',
+      {
+        isolatedModules: true,
+      },
+    ],
+  },
+  moduleNameMapper: {
+    '^.+\\?raw$': '<rootDir>/jest.raw-mock.js',
+    '\\.vue$': '<rootDir>/jest.raw-mock.js',
+    '^monaco-editor-core$': '<rootDir>/jest.monaco-mock.js',
+  },
+}

jest.monaco-mock.js

@@ -0,0 +1,21 @@
+// Manual mock for monaco-editor-core
+const mockModels = new Map()
+
+module.exports = {
+  Uri: {
+    parse: jest.fn((uri) => ({ toString: () => uri })),
+  },
+  editor: {
+    getModel: jest.fn((uri) => mockModels.get(uri.toString())),
+    getModels: jest.fn(() => Array.from(mockModels.values())),
+    createWebWorker: jest.fn(),
+    registerEditorOpener: jest.fn(),
+  },
+  languages: {
+    register: jest.fn(),
+    setLanguageConfiguration: jest.fn(),
+    onLanguage: jest.fn(),
+  },
+  // Export for test access
+  __mockModels: mockModels,
+}

jest.raw-mock.js

@@ -0,0 +1 @@
+module.exports = ''

package.json

@@ -86,6 +86,7 @@
     "@types/babel__standalone": "^7.1.9",
     "@types/codemirror": "^5.60.16",
     "@types/hash-sum": "^1.0.2",
+    "@types/jest": "^30.0.0",
     "@types/node": "^24.2.0",
     "@vitejs/plugin-vue": "^6.0.1",
     "@volar/jsdelivr": "2.4.23",
@@ -104,19 +105,21 @@
     "eslint-plugin-vue": "^10.4.0",
     "fflate": "^0.8.2",
     "hash-sum": "^2.0.0",
+    "jest": "^30.4.2",
     "lint-staged": "^16.1.4",
     "monaco-editor-core": "^0.52.2",
     "prettier": "^3.6.2",
     "shiki": "^4.0.2",
     "simple-git-hooks": "^2.13.1",
     "source-map-js": "^1.2.1",
     "sucrase": "^3.35.0",
+    "ts-jest": "^29.4.10",
     "typescript": "^5.9.2",
     "typescript-eslint": "^8.39.0",
     "vite": "^8.0.8",
     "vite-plugin-dts": "^4.5.4",
-    "vscode-uri": "^3.1.0",
     "volar-service-typescript": "0.0.65",
+    "vscode-uri": "^3.1.0",
     "vue": "^3.5.18",
     "vue-tsc": "3.0.8"
   }