feat: add RootCloseWrapper's disabled support to Overlay (#273)

* Add RootCloseWrapper's disabled support to Overlay

* add test spec for props.rootCloseDisabled

* use enzyme

* use enzyme

* code style

* code style

Author: sundayu

src/Overlay.js

@@ -138,6 +138,7 @@ class Overlay extends React.Component {
         <RootCloseWrapper
           onRootClose={props.onHide}
           event={props.rootCloseEvent}
+          disabled={props.rootCloseDisabled}
         >
           {child}
         </RootCloseWrapper>
@@ -203,7 +204,11 @@ Overlay.propTypes = {
    * Specify event for toggling overlay
    */
   rootCloseEvent: RootCloseWrapper.propTypes.event,
-
+  
+  /**
+   * Specify disabled for disable RootCloseWrapper
+   */
+  rootCloseDisabled: RootCloseWrapper.propTypes.disabled,
   /**
    * A Callback fired by the Overlay when it wishes to be hidden.
    *

test/OverlaySpec.js

@@ -61,5 +61,13 @@ describe('Overlay', () => {
 
       expect(wrapper.props().event).to.equal('mousedown')
     })
+    
+    it('passes down the rootCloseDisabled', () => {
+      instance.setProps({ rootCloseDisabled: true })
+
+      const wrapper = instance.find('RootCloseWrapper')
+
+      expect(wrapper.props().disabled).to.equal(true)
+    })
   })
 })