feat: set up jest

jest.config.js

@@ -0,0 +1,12 @@
+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  globals: {
+    'ts-jest': {
+      tsConfig: 'src/tsconfig.json'
+    }
+  },
+  moduleNameMapper: {
+    '^@/(.*)$': '<rootDir>/src/$1'
+  }
+}

package.json

@@ -34,7 +34,8 @@
     "build": "rimraf -rf dist && tsc -p src/client && tsc -p src/node && node scripts/copy",
     "changelog": "conventional-changelog -p angular -i CHANGELOG.md -s",
     "prepublishOnly": "yarn build && yarn changelog",
-    "postpublish": "git add CHANGELOG.md && git commit -m 'chore: changelog [ci skip]'"
+    "postpublish": "git add CHANGELOG.md && git commit -m 'chore: changelog [ci skip]'",
+    "test": "jest"
   },
   "engines": {
     "node": ">=10.0.0"
@@ -75,16 +76,20 @@
   },
   "devDependencies": {
     "@types/fs-extra": "^8.1.0",
+    "@types/jest": "^26.0.3",
     "@types/lru-cache": "^5.1.0",
     "@types/markdown-it": "^10.0.1",
     "@types/node": "^13.13.4",
     "@types/postcss-load-config": "^2.0.1",
     "chokidar": "^3.4.0",
     "conventional-changelog-cli": "^2.0.31",
+    "jest": "^26.0.1",
+    "jest-each": "^26.0.1",
     "lint-staged": "^10.2.1",
     "npm-run-all": "^4.1.5",
     "prettier": "^2.0.5",
     "rimraf": "^3.0.2",
+    "ts-jest": "^26.1.1",
     "typescript": "^3.8.3",
     "yorkie": "^2.0.0"
   }

src/tsconfig.json

@@ -0,0 +1,25 @@
+{
+  "compilerOptions": {
+    "baseUrl": "./",
+    "outDir": "../dist",
+    "module": "commonjs",
+    "lib": ["ESNext", "DOM"],
+    "sourceMap": false,
+    "target": "esnext",
+    "moduleResolution": "node",
+    "esModuleInterop": true,
+    "declaration": true,
+    "allowJs": true,
+    "checkJs": true,
+    "allowSyntheticDefaultImports": true,
+    "noUnusedLocals": true,
+    "strictNullChecks": true,
+    "noImplicitAny": true,
+    "removeComments": false,
+    "preserveSymlinks": true,
+    "paths": {
+      "@/*": ["./*"]
+    }
+  },
+  "include": ["."]
+}