Merge pull request #67 from edx/hyperlink-component

Hyperlink Component

.storybook/__snapshots__/Storyshots.test.js.snap

@@ -133,6 +133,54 @@ exports[`Storyshots Dropdown basic usage 1`] = `
 </div>
 `;
 
+exports[`Storyshots HyperLink minimal usage 1`] = `
+<a
+  href="https://en.wikipedia.org/wiki/Hyperlink"
+  onClick={[Function]}
+  target="_self"
+>
+  edX.org
+</a>
+`;
+
+exports[`Storyshots HyperLink with blank target 1`] = `
+<a
+  href="https://www.edx.org"
+  onClick={[Function]}
+  target="_blank"
+>
+  edX.org
+  <span>
+     
+    <span
+      aria-hidden={false}
+      aria-label="Opens in a new window"
+      className="fa fa-external-link"
+      title="Opens in a new window"
+    />
+  </span>
+</a>
+`;
+
+exports[`Storyshots HyperLink with onClick 1`] = `
+<a
+  href="https://www.edx.org"
+  onClick={[Function]}
+  target="_blank"
+>
+  edX.org
+  <span>
+     
+    <span
+      aria-hidden={false}
+      aria-label="Opens in a new window"
+      className="fa fa-external-link"
+      title="Opens in a new window"
+    />
+  </span>
+</a>
+`;
+
 exports[`Storyshots InputSelect basic usage 1`] = `
 <div
   className="form-group"

package.json

 {
   "name": "@edx/paragon",
-  "version": "1.1.6",
+  "version": "1.1.7",
   "description": "Accessible, responsive UI component library based on Bootstrap.",
   "main": "src/index.js",
   "author": "arizzitano",

src/Hyperlink/Hyperlink.stories.jsx

+/* eslint-disable import/no-extraneous-dependencies, no-console */
+import React from 'react';
+import { storiesOf } from '@storybook/react';
+import { action } from '@storybook/addon-actions';
+import { setConsoleOptions } from '@storybook/addon-console';
+
+import Hyperlink from './index';
+
+setConsoleOptions({
+  panelExclude: ['warn', 'error'],
+});
+
+const onClick = (event) => {
+  console.log(`onClick fired for ${event.target}`);
+
+  action('HyperLink Click');
+};
+
+storiesOf('HyperLink', module)
+  .add('minimal usage', () => (
+    <Hyperlink
+      destination={'https://en.wikipedia.org/wiki/Hyperlink'}
+      content={'edX.org'}
+    />
+  ))
+  .add('with blank target', () => (
+    <Hyperlink
+      destination={'https://www.edx.org'}
+      content={'edX.org'}
+      target={'_blank'}
+    />
+  ))
+  .add('with onClick', () => (
+    <Hyperlink
+      destination={'https://www.edx.org'}
+      content={'edX.org'}
+      target={'_blank'}
+      onClick={onClick}
+    />
+  ));

src/Hyperlink/Hyperlink.test.jsx

+/* eslint-disable import/no-extraneous-dependencies */
+import React from 'react';
+import { shallow, mount } from 'enzyme';
+import classNames from 'classnames';
+import FontAwesomeStyles from 'font-awesome/css/font-awesome.min.css';
+
+import Hyperlink from './index';
+
+const content = 'content';
+const destination = 'destination';
+const onClick = () => {};
+const props = {
+  content,
+  destination,
+  onClick,
+};
+const externalLinkAlternativeText = 'externalLinkAlternativeText';
+const externalLinkTitle = 'externalLinktTitle';
+const externalLinkProps = {
+  target: '_blank',
+  externalLinkAlternativeText,
+  externalLinkTitle,
+  ...props,
+};
+
+describe('correct rendering', () => {
+  it('renders Hyperlink', () => {
+    const wrapper = shallow(<Hyperlink {...props} />);
+    expect(wrapper.type()).toEqual('a');
+    expect(wrapper).toHaveLength(1);
+
+    expect(wrapper.prop('children')).toEqual([content, undefined]);
+    expect(wrapper.prop('href')).toEqual(destination);
+    expect(wrapper.prop('target')).toEqual('_self');
+    expect(wrapper.prop('onClick')).toEqual(onClick);
+
+    expect(wrapper.find('span')).toHaveLength(0);
+    expect(wrapper.find('i')).toHaveLength(0);
+  });
+
+  it('renders external Hyperlink', () => {
+    const wrapper = mount(<Hyperlink {...externalLinkProps} />);
+
+    expect(wrapper.find('span')).toHaveLength(2);
+
+    const icon = wrapper.find('span').at(1);
+
+    expect(icon.prop('aria-hidden')).toEqual(false);
+    expect(icon.prop('className'))
+      .toEqual(classNames(FontAwesomeStyles.fa, FontAwesomeStyles['fa-external-link']));
+    expect(icon.prop('aria-label')).toEqual(externalLinkAlternativeText);
+    expect(icon.prop('title')).toEqual(externalLinkTitle);
+  });
+});
+
+describe('event handlers are triggered correctly', () => {
+  let spy;
+
+  beforeEach(() => { spy = jest.fn(); });
+
+  it('should fire onClick', () => {
+    const wrapper = mount(<Hyperlink {...props} onClick={spy} />);
+    expect(spy).toHaveBeenCalledTimes(0);
+    wrapper.simulate('click');
+    expect(spy).toHaveBeenCalledTimes(1);
+  });
+});

src/Hyperlink/index.jsx

+import React from 'react';
+import classNames from 'classnames';
+import FontAwesomeStyles from 'font-awesome/css/font-awesome.min.css';
+import PropTypes from 'prop-types';
+import isRequiredIf from 'react-proptype-conditional-require';
+
+function Hyperlink(props) {
+  const {
+    destination,
+    content,
+    target,
+    onClick,
+    externalLinkAlternativeText,
+    externalLinkTitle,
+    ...other
+  } = props;
+
+  let externalLinkIcon;
+
+  if (target === '_blank') {
+    externalLinkIcon = (
+      // Space between content and icon
+      <span>{' '}
+        <span
+          className={classNames(FontAwesomeStyles.fa, FontAwesomeStyles['fa-external-link'])}
+          aria-hidden={false}
+          aria-label={externalLinkAlternativeText}
+          title={externalLinkTitle}
+        />
+      </span>
+    );
+  }
+
+  return (
+    <a
+      href={destination}
+      target={target}
+      onClick={onClick}
+      {...other}
+    >{content}{externalLinkIcon}
+    </a>
+  );
+}
+
+Hyperlink.defaultProps = {
+  target: '_self',
+  onClick: () => {},
+  externalLinkAlternativeText: 'Opens in a new window',
+  externalLinkTitle: 'Opens in a new window',
+};
+
+Hyperlink.propTypes = {
+  destination: PropTypes.string.isRequired,
+  content: PropTypes.string.isRequired,
+  target: PropTypes.string,
+  onClick: PropTypes.func,
+  externalLinkAlternativeText: isRequiredIf(PropTypes.string, props => props.target === '_blank'),
+  externalLinkTitle: isRequiredIf(PropTypes.string, props => props.target === '_blank'),
+};
+
+export default Hyperlink;