setup TypeScript

Author: santakadev

examples/typescript/ts-step_shotgun_surgery-01_base/babel.config.js

@@ -0,0 +1,6 @@
+module.exports = {
+  presets: [
+    ['@babel/preset-env', {targets: {node: 'current'}}],
+    '@babel/preset-typescript',
+  ],
+};

examples/typescript/ts-step_shotgun_surgery-01_base/package.json

@@ -7,6 +7,12 @@
     "test": "jest"
   },
   "devDependencies": {
-    "jest": "^26.6.3"
+    "@babel/core": "^7.13.15",
+    "@babel/preset-env": "^7.13.15",
+    "@babel/preset-typescript": "^7.13.0",
+    "@types/jest": "^26.0.22",
+    "babel-jest": "^26.6.3",
+    "jest": "^26.6.3",
+    "typescript": "^4.2.4"
   }
 }

examples/typescript/ts-step_shotgun_surgery-01_base/src/index.js

@@ -0,0 +1,9 @@
+interface Course {
+    title: string;
+}
+
+function courseTitle(course: Course) {
+    return course.title;
+}
+
+module.exports = courseTitle;

examples/typescript/ts-step_shotgun_surgery-01_base/src/index.ts

@@ -0,0 +1,6 @@
+const courseTitle = require('../src');
+
+test('gets the course title', () => {
+    const course = {title: 'Refactoring'}
+    expect(courseTitle(course)).toBe('Refactoring')
+});