Add working Jest & TypeScript config

- Jest now uses ts-jest for transforms
- TypeScript compilation via `lerna run tsc`

jest.config.js

@@ -0,0 +1,12 @@
+module.exports = {
+  clearMocks: true,
+  moduleFileExtensions: ['js', 'ts'],
+  roots: ['<rootDir>/packages'],
+  testEnvironment: 'node',
+  testMatch: ['**/__tests__/*.test.ts'],
+  testRunner: 'jest-circus/runner',
+  transform: {
+    '^.+\\.ts$': 'ts-jest'
+  },
+  verbose: true
+}

package.json

@@ -4,18 +4,13 @@
   "scripts": {
     "test": "jest"
   },
-  "jest": {
-    "clearMocks": true,
-    "roots": [
-      "<rootDir>/packages"
-    ],
-    "testEnvironment": "node",
-    "testRunner": "jest-circus/runner",
-    "verbose": true
-  },
   "devDependencies": {
+    "@types/jest": "^24.0.11",
+    "@types/node": "^11.13.5",
     "jest": "^24.7.1",
     "jest-circus": "^24.7.1",
-    "lerna": "^3.13.3"
+    "lerna": "^3.13.3",
+    "ts-jest": "^24.0.2",
+    "typescript": "^3.4.4"
   }
 }

packages/github/__tests__/github.test.ts

@@ -0,0 +1,7 @@
+import { github } from '../src/github';
+
+describe('@actions/github', () => {
+  it('needs tests', () => {
+      expect(github()).toBe(true)
+  });
+});

packages/github/package.json

@@ -24,7 +24,8 @@
     "url": "git+https://github.com/actions/toolkit.git"
   },
   "scripts": {
-    "test": "echo \"Error: run tests from root\" && exit 1"
+    "test": "echo \"Error: run tests from root\" && exit 1",
+    "tsc": "tsc"
   },
   "bugs": {
     "url": "https://github.com/actions/toolkit/issues"

packages/github/src/github.ts

@@ -0,0 +1,3 @@
+export function github() {
+  return true
+}

packages/github/tsconfig.json

@@ -0,0 +1,11 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "baseUrl": "./",
+    "outDir": "./lib",
+    "rootDir": "./src"
+  },
+  "include": [
+    "./src"
+  ]
+}

tsconfig.json

@@ -0,0 +1,14 @@
+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "strict": true,
+    "declaration": true,
+    "target": "es6",
+    "sourceMap": true,
+    "lib": ["es6"]
+  },
+  "exclude": [
+    "node_modules",
+    "**/*.test.ts"
+  ]
+}