Merge pull request Flipboard#38 from brentvatne/add-jest

Add Jest for unit testing

Author: Michael Johnston

lib/__tests__/clamp-test.js

@@ -0,0 +1,17 @@
+jest.dontMock('../clamp.js');
+
+var clamp = require('../clamp');
+
+describe('clamp', function() {
+ it('returns the min if n is less than min', function() {
+ expect(clamp(-1, 0, 1)).toBe(0);
+ });
+
+ it('returns the max if n is greater than max', function() {
+ expect(clamp(2, 0, 1)).toBe(1);
+ });
+
+ it('returns n if n is between min and max', function() {
+ expect(clamp(0.5, 0, 1)).toBe(0.5);
+ });
+});

lib/clamp.js

@@ -10,4 +10,3 @@
 module.exports = function (number, min, max) {
  return Math.min(Math.max(number, min), max);
 };
-

package.json

@@ -8,7 +8,8 @@
  "url": "https://github.com/Flipboard/react-canvas.git"
  },
  "scripts": {
- "start": "./node_modules/.bin/gulp"
+ "start": "./node_modules/.bin/gulp",
+ "test": "./node_modules/.bin/jest"
  },
  "keywords": [
  "react",
@@ -26,6 +27,7 @@
  "gulp": "^3.8.10",
  "gulp-connect": "^2.2.0",
  "gulp-webpack": "^1.2.0",
+ "jest-cli": "^0.2.2",
  "jsx-loader": "^0.12.2",
  "react": "^0.13.0-beta.1",
  "transform-loader": "^0.2.1",