Adding support for default icons based on Message type

src/components/Message/index.js

@@ -3,7 +3,15 @@ import PropTypes from 'prop-types';
 
 import style from './style.css';
 
-const renderIcon = icon => {
+import AlertIcon from 'feather-icons/dist/icons/alert-octagon.svg';
+
+const iconTypes = {
+  error: AlertIcon
+};
+
+const renderIcon = (type, icon) => {
+  icon = icon || iconTypes[type];
+
   if (!icon) {
     return;
   }
@@ -15,7 +23,7 @@ const renderIcon = icon => {
 const Message = ({ type, icon, heading, children }) => (
   <div className={ [ style.message, type && style[type] ].filter(Boolean).join(' ') }>
     <div className={ style.header }>
-      <h2>{ renderIcon(icon) }{ heading }</h2>
+      <h2>{ renderIcon(type, icon) }{ heading }</h2>
     </div>
     <div className={ style.content }>
       { children }

src/components/RavenError/__snapshots__/test.js.snap

@@ -3,7 +3,6 @@
 exports[`RavenError rendering 1`] = `
 <Message
   heading="translate(An error has occurred)"
-  icon={[Function]}
   type="error"
 >
   <p>

src/components/RavenError/index.js

@@ -4,7 +4,6 @@ import { translate, Trans } from 'react-i18next';
 import { Raven } from 'sentry';
 
 import Message from 'components/Message';
-import AlertIcon from 'feather-icons/dist/icons/alert-octagon.svg';
 
 class RavenError extends React.Component {
   componentDidMount() {
@@ -23,7 +22,7 @@ class RavenError extends React.Component {
   render() {
     const { t } = this.props;
 
-    return <Message type="error" icon={ AlertIcon } heading={ t('An error has occurred') }>
+    return <Message type="error" heading={ t('An error has occurred') }>
       <p><Trans i18nKey="This error has been logged">
         This error has been logged. You may also <a href="#error-report" onClick={ this.reportError }>fill out a report</a>.
       </Trans></p>

src/pages/404/Component.js

@@ -3,14 +3,13 @@ import PropTypes from 'prop-types';
 import { translate, Trans } from 'react-i18next';
 
 import Message from 'components/Message';
-import AlertIcon from 'feather-icons/dist/icons/alert-octagon.svg';
 import Header from 'components/Header';
 import Footer from 'components/Footer';
 
 const Component = ({ t }) => (
   <React.Fragment>
     <Header/>
-    <Message type="error" icon={ AlertIcon } heading={ t('404 Page Not Found') }>
+    <Message type="error" heading={ t('404 Page Not Found') }>
       <p><Trans>The page you have requested could not be found</Trans></p>
     </Message>
     <Footer/>