Added more webdriver tests testing against a real browser.

src/components/layers/LayerIdBlock.jsx

@@ -8,11 +8,14 @@ import StringInput from '../inputs/StringInput'
 class LayerIdBlock extends React.Component {
   static propTypes = {
     value: PropTypes.string.isRequired,
+    wdKey: PropTypes.string.isRequired,
     onChange: PropTypes.func.isRequired,
   }
 
   render() {
-    return <InputBlock label={"ID"} doc={styleSpec.latest.layer.id.doc}>
+    return <InputBlock label={"ID"} doc={styleSpec.latest.layer.id.doc}
+      data-wd-key={this.props.wdKey}
+    >
       <StringInput
         value={this.props.value}
         onChange={this.props.onChange}