fix(Dropdown): do not select disabled items on blur (#4199)

* added a variable to recognize if a country is blocked or not

* remove lock file

* add a comment & unit test

Co-authored-by: Loic Cesar Boubeji Tiangueu <loic.cesar.boubeji.tiangueu@mni.thm.de>
Co-authored-by: Oleksandr Fediashov <olfedias@microsoft.com>

src/modules/Dropdown/Dropdown.js

@@ -275,10 +275,12 @@ export default class Dropdown extends Component {
 
     const item = this.getSelectedItem(selectedIndex)
     const selectedValue = _.get(item, 'value')
+    const disabled = _.get(item, 'disabled')
 
     // prevent selecting null if there was no selected item value
     // prevent selecting duplicate items when the dropdown is closed
-    if (_.isNil(selectedValue) || !open) {
+    // prevent selecting disabled items
+    if (_.isNil(selectedValue) || !open || disabled) {
       return value
     }
 

test/specs/modules/Dropdown/Dropdown-test.js

@@ -2278,6 +2278,25 @@ describe('Dropdown', () => {
 
       wrapper.should.have.state('focus', true)
     })
+
+    it('does not selected "disabled" item after blur', () => {
+      const customOptions = [
+        { key: 'foo', text: 'foo', value: 'foo' },
+        { key: 'bar', text: 'bar', value: 'bar', disabled: true },
+      ]
+
+      wrapperMount(<Dropdown options={customOptions} selection search />)
+
+      wrapper.simulate('focus')
+      dropdownMenuIsOpen()
+
+      wrapper.find('input.search').simulate('change', { target: { value: 'bar' } })
+      wrapper.find('input.search').getDOMNode().blur()
+      wrapper.simulate('blur')
+
+      dropdownMenuIsClosed()
+      wrapper.find('.item.disabled').should.have.not.className('selected')
+    })
   })
 
   describe('searchInput', () => {