Adding tests with jest

.babelrc

@@ -1,3 +1,11 @@
 {
-  "presets": ["es2015"]
+  "presets": [
+    ["es2015", {"modules": false}]
+  ],
+
+  "env": {
+    "test": {
+      "plugins": ["transform-es2015-modules-commonjs"]
+    }
+  }
 }

.eslintrc

@@ -1,11 +1,15 @@
 {
   "env": {
+    "jest/globals": true,
     "browser": true
   },
   "parserOptions": {
     "ecmaVersion": 6,
     "sourceType": "module"
   },
+  "plugins": [
+    "jest"
+  ],
   "rules": {
     "no-cond-assign": 0,
     "no-console": 2,

package.json

@@ -31,6 +31,7 @@
     "ava": "^0.19.1",
     "babel-cli": "^6.24.1",
     "babel-core": "^6.24.1",
+    "babel-jest": "^19.0.0",
     "babel-loader": "^6.4.1",
     "babel-preset-env": "^1.4.0",
     "babel-preset-es2015": "^6.24.1",
@@ -38,8 +39,11 @@
     "browser-env": "^2.0.30",
     "eslint": "^3.19.0",
     "eslint-loader": "^1.7.1",
+    "eslint-plugin-jest": "^19.0.1",
+    "jest": "^19.0.2",
     "npm-run-all": "^4.0.2",
     "rimraf": "^2.6.1",
+    "simulant": "^0.2.2",
     "smart-banner-webpack-plugin": "^3.0.1",
     "webpack": "^2.4.1",
     "webpack-dev-server": "^2.4.2"
@@ -50,31 +54,6 @@
     "build:main": "webpack",
     "build:main.min": "webpack --output-filename [name].min.js -p",
     "dev": "webpack-dev-server",
-    "test": "ava test/*.js"
+    "test": "jest"
-  },
-  "babel": {
-    "presets": [
-      [
-        "es2015",
-        {
-          "modules": false
-        },
-        "@ava/stage-4",
-        "@ava/transform-test-files"
-      ]
-    ]
-  },
-  "ava": {
-    "babel": {
-      "presets": [
-        "es2015",
-        "stage-0",
-        "react"
-      ]
-    },
-    "require": [
-      "babel-register",
-      "./test/helpers/setup-browser-env.js"
-    ]
   }
 }

src/js/utils/dom.js

@@ -46,14 +46,17 @@ export default class DOM {
 
   /**
    * Gets the prefixed transitionend event.
+   * @param {?Element} optEl Element to check
    * @return {string}
    */
-  static getTransitionEvent() {
+  static getTransitionEvent(optEl) {
-    if (transitionEvent) {
+    if (transitionEvent && !optEl) {
       return transitionEvent;
     }
 
-    const el = document.createElement('ws');
+    transitionEvent = '';
+
+    const el = optEl || document.createElement('ws');
     const transitions = {
       'transition': 'transitionend',
       'OTransition': 'oTransitionEnd',
@@ -76,14 +79,17 @@ export default class DOM {
 
   /**
    * Gets the prefixed animation end event.
+   * @param {?Element} optEl Element to check
    * @return {string}
    */
-  static getAnimationEvent() {
+  static getAnimationEvent(optEl) {
-    if (animationEvent) {
+    if (animationEvent && !optEl) {
       return animationEvent;
     }
 
-    const el = document.createElement('ws');
+    animationEvent = '';
+
+    const el = optEl || document.createElement('ws');
     const animations = {
       'animation': 'animationend',
       'OAnimation': 'oAnimationEnd',
@@ -156,10 +162,9 @@ export default class DOM {
 
     if (document.activeElement) {
       const isContentEditable = document.activeElement
-          .contentEditable !== 'inherit';
+          .contentEditable !== 'inherit' && document.activeElement.contentEditable !== undefined;
       const isInput = ['INPUT', 'SELECT', 'OPTION', 'TEXTAREA']
           .indexOf(document.activeElement.tagName) > -1;
-
       result = isInput || isContentEditable;
     }
 

test/utils/dom.test.js

@@ -0,0 +1,270 @@
+import DOM from '../../src/js/utils/dom';
+import simulant from 'simulant';
+
+describe('Node creation', () => {
+  test('Creates a node', () => {
+    const node = DOM.createNode('p');
+
+    expect(node).toBeInstanceOf(Element);
+    expect(node.tagName).toBe('P');
+    expect(node.id).toBe('');
+  });
+
+  test('Should be possible to pass an id', () => {
+    const node = DOM.createNode('p', 'myId');
+
+    expect(node.id).toBe('myId');
+  });
+
+  test('Should be possible to pass text', () => {
+    const node = DOM.createNode('p', 'id', 'foo');
+
+    expect(node.textContent).toBe('foo');
+  });
+});
+
+describe('Once', () => {
+  let parent;
+  let inner;
+
+  beforeEach(() => {
+    document.body.innerHTML = `
+      <div id="parent">
+        <div id="inner"></div>
+      </div>
+    `;
+    parent = document.getElementById('parent');
+    inner = document.getElementById('inner');
+  });
+
+  afterEach(() => {
+    document.body.innerHTML = '';
+  });
+
+  test('Only once called once', () => {
+    const cb = jest.fn();
+    DOM.once(parent, 'click', cb);
+    simulant.fire(parent, 'click');
+    simulant.fire(parent, 'click');
+    simulant.fire(parent, 'click');
+
+    expect(cb).toHaveBeenCalledTimes(1);
+  });
+
+  test('Callback doesn\'t run on bubbled event', () => {
+    const cb = jest.fn();
+    DOM.once(parent, 'click', cb);
+    simulant.fire(inner, 'click');
+
+    expect(cb).not.toHaveBeenCalled();
+  });
+});
+
+describe('Transition', () => {
+  test('Returns unprefixed first if available', () => {
+    const fakeEl = {
+      style: {
+        transition: 'foo',
+        OTransition: 'foo',
+        MozTransition: 'foo',
+        WebkitTransition: 'foo'
+      }
+    };
+
+    expect(DOM.getTransitionEvent(fakeEl)).toBe('transitionend');
+  });
+
+  test('Prefixed Opera', () => {
+    const fakeEl = {
+      style: {
+        OTransition: 'foo'
+      }
+    };
+
+    expect(DOM.getTransitionEvent(fakeEl)).toBe('oTransitionEnd');
+  });
+
+
+  test('Prefixed Gecko', () => {
+    const fakeEl = {
+      style: {
+        MozTransition: 'foo'
+      }
+    };
+
+    expect(DOM.getTransitionEvent(fakeEl)).toBe('transitionend');
+  });
+
+
+  test('Prefixed Webkit', () => {
+    const fakeEl = {
+      style: {
+        WebkitTransition: 'foo'
+      }
+    };
+
+    expect(DOM.getTransitionEvent(fakeEl)).toBe('webkitTransitionEnd');
+  });
+
+  test('Retains value', () => {
+    const fakeEl = {
+      style: {
+        WebkitTransition: 'foo'
+      }
+    };
+
+    expect(DOM.getTransitionEvent(fakeEl)).toBe('webkitTransitionEnd');
+    expect(DOM.getTransitionEvent()).toBe('webkitTransitionEnd');
+  });
+});
+
+describe('Animation', () => {
+  test('Returns unprefixed first if available', () => {
+    const fakeEl = {
+      style: {
+        animation: 'foo',
+        OAnimation: 'foo',
+        MozAnimation: 'foo',
+        WebkitAnimation: 'foo'
+      }
+    };
+
+    expect(DOM.getAnimationEvent(fakeEl)).toBe('animationend');
+  });
+
+  test('Prefixed Opera', () => {
+    const fakeEl = {
+      style: {
+        OAnimation: 'foo'
+      }
+    };
+
+    expect(DOM.getAnimationEvent(fakeEl)).toBe('oAnimationEnd');
+  });
+
+
+  test('Prefixed Gecko', () => {
+    const fakeEl = {
+      style: {
+        MozAnimation: 'foo'
+      }
+    };
+
+    expect(DOM.getAnimationEvent(fakeEl)).toBe('animationend');
+  });
+
+
+  test('Prefixed Webkit', () => {
+    const fakeEl = {
+      style: {
+        WebkitAnimation: 'foo'
+      }
+    };
+
+    expect(DOM.getAnimationEvent(fakeEl)).toBe('webkitAnimationEnd');
+  });
+
+  test('Retains value', () => {
+    const fakeEl = {
+      style: {
+        WebkitAnimation: 'foo'
+      }
+    };
+
+    expect(DOM.getAnimationEvent(fakeEl)).toBe('webkitAnimationEnd');
+    expect(DOM.getAnimationEvent()).toBe('webkitAnimationEnd');
+  });
+});
+
+describe('Show/hide', () => {
+  test('Show removes the display property', () => {
+    const el = DOM.createNode('div');
+    el.style.display = 'flex';
+
+    expect(el.style.display).toBe('flex');
+    DOM.show(el);
+    expect(el.style.display).toBe('');
+  });
+
+  test('Hide adds display none', () => {
+    const el = DOM.createNode('div');
+
+    expect(el.style.display).toBe('');
+    DOM.hide(el);
+    expect(el.style.display).toBe('none');
+  });
+});
+
+describe('Custom Event', () => {
+  test('Event gets fired', () => {
+    const cb = jest.fn();
+    const el = DOM.createNode('div');
+
+    el.addEventListener('foo', cb);
+    DOM.fireEvent(el, 'foo');
+    expect(cb).toHaveBeenCalled();
+  });
+
+  test('Event can pass data', () => {
+    const cb = jest.fn();
+    const el = DOM.createNode('div');
+
+    el.addEventListener('foo', cb);
+    DOM.fireEvent(el, 'foo', {
+      foo: 'bar'
+    });
+    expect(cb.mock.calls[0][0].detail.foo).toBe('bar');
+  });
+});
+
+describe('To Array', () => {
+  test('Converts to array', () => {
+    document.body.innerHTML = '<p></p><p></p><p></p><p></p><p></p>';
+    const paragraphs = document.querySelectorAll('p');
+
+    expect(paragraphs.length).toBe(5);
+    expect(paragraphs).not.toBeInstanceOf(Array);
+    expect(DOM.toArray(paragraphs)).toBeInstanceOf(Array);
+    expect(DOM.toArray(paragraphs).length).toBe(5);
+
+    document.body.innerHTML = '';
+  });
+});
+
+describe('Focusble Element', () => {
+  beforeEach(() => {
+    document.body.innerHTML = `      
+      <p id="noContent" tabindex="0"></p>
+      <input id="input" type="text">
+      <select id="select">
+        <option id="option1"></option>
+        <option id="option2"></option>
+      </select>
+      <textarea id="textarea"></textarea>
+    `;
+  });
+
+  afterEach(() => {
+    document.body.innerHTML = '';
+  });
+
+  test('Returns false if not focusable', () => {
+    document.getElementById('noContent').focus();
+    expect(DOM.isFocusableElement()).toBe(false);
+  });
+
+  test('Returns true if focusable', () => {
+    document.getElementById('noContent').focus();
+    expect(DOM.isFocusableElement()).toBe(false);
+    document.getElementById('input').focus();
+    expect(DOM.isFocusableElement()).toBe(true);
+    document.getElementById('noContent').focus();
+    expect(DOM.isFocusableElement()).toBe(false);
+    document.getElementById('select').focus();
+    expect(DOM.isFocusableElement()).toBe(true);
+    document.getElementById('noContent').focus();
+    expect(DOM.isFocusableElement()).toBe(false);
+    document.getElementById('textarea').focus();
+    expect(DOM.isFocusableElement()).toBe(true);
+  });
+});

test/utils/keys.test.js

@@ -0,0 +1,14 @@
+import Keys from '../../src/js/utils/keys';
+
+test('Keys are present', () => {
+  expect(Keys.ENTER).toBe(13);
+  expect(Keys.SPACE).toBe(32);
+  expect(Keys.RE_PAGE).toBe(33);
+  expect(Keys.AV_PAGE).toBe(34);
+  expect(Keys.END).toBe(35);
+  expect(Keys.HOME).toBe(36);
+  expect(Keys.LEFT).toBe(37);
+  expect(Keys.UP).toBe(38);
+  expect(Keys.RIGHT).toBe(39);
+  expect(Keys.DOWN).toBe(40);
+});