test(jest): add jest dependencies and update tsconfig

jest.config.js

@@ -0,0 +1,9 @@
+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  roots: ['./lib'],
+  testMatch: ['**/__tests__/**/*.+(ts)', '**/?(*.)+(spec|test).+(ts)'],
+  transform: {
+    '^.+\\.(ts)$': 'ts-jest'
+  }
+};

package.json

@@ -23,9 +23,11 @@
     "build": "yarn build:dockerimage && yarn build:emscripten && yarn build:lib",
     "clean": "rimraf build dist",
     "lint": "eslint . --ext .js,.ts",
+    "test": "jest",
     "changelog": "auto-changelog -p && git add CHANGELOG.md"
   },
   "devDependencies": {
+    "@types/jest": "^24.0.25",
     "@types/node": "^13.1.2",
     "@typescript-eslint/eslint-plugin": "^2.14.0",
     "@typescript-eslint/parser": "^2.14.0",
@@ -35,10 +37,12 @@
     "eslint-config-google": "^0.14.0",
     "eslint-config-prettier": "^6.9.0",
     "eslint-plugin-prettier": "^3.1.2",
+    "jest": "^24.9.0",
     "napa": "^3.0.0",
     "node": "^13.5.0",
     "prettier-eslint": "^9.0.1",
     "rimraf": "^3.0.0",
+    "ts-jest": "^24.2.0",
     "typescript": "^3.7.4",
     "typescript-eslint": "^0.0.1-alpha.0"
   },

tsconfig.json

@@ -9,5 +9,10 @@
     "sourceMap": true,
     "declaration": true
   },
-  "exclude": ["dist", "build"]
+  "exclude": [
+    "dist",
+    "build",
+    "**/__tests__/**/*.+(ts)",
+    "**/?(*.)+(spec|test).+(ts)"
+  ]
 }