fix(chips): makes sure that input is cleared when selecting a chip

Closes #3575

src/components/autocomplete/js/autocompleteController.js

@@ -135,8 +135,7 @@ function MdAutocompleteCtrl ($scope, $element, $mdUtil, $mdConstant, $mdTheming,
  $attrs.$observe('disabled', function (value) { ctrl.isDisabled = value; });
  $attrs.$observe('required', function (value) { ctrl.isRequired = value !== null; });
  $scope.$watch('searchText', wait ? $mdUtil.debounce(handleSearchText, wait) : handleSearchText);
- registerSelectedItemWatcher(selectedItemChange);
- $scope.$watch('selectedItem', handleSelectedItemChange);
+ $scope.$watch('selectedItem', selectedItemChange);
  angular.element($window).on('resize', positionDropdown);
  $scope.$on('$destroy', cleanup);
  }
@@ -236,6 +235,7 @@ function MdAutocompleteCtrl ($scope, $element, $mdUtil, $mdConstant, $mdTheming,
  if (selectedItem) {
  getDisplayValue(selectedItem).then(function(val) {
  $scope.searchText = val;
+ handleSelectedItemChange(selectedItem, previousSelectedItem);
  });
  }
 
@@ -249,6 +249,9 @@ function MdAutocompleteCtrl ($scope, $element, $mdUtil, $mdConstant, $mdTheming,
  angular.isFunction($scope.itemChange) && $scope.itemChange(getItemAsNameVal($scope.selectedItem));
  }
 
+ /**
+ * Use the user-defined expression to announce changes each time the search text is changed
+ */
  function announceTextChange() {
  angular.isFunction($scope.textChange) && $scope.textChange();
  }
@@ -260,9 +263,7 @@ function MdAutocompleteCtrl ($scope, $element, $mdUtil, $mdConstant, $mdTheming,
  * @param previousSelectedItem
  */
  function handleSelectedItemChange(selectedItem, previousSelectedItem) {
- for (var i = 0; i < selectedItemWatchers.length; ++i) {
- selectedItemWatchers[i](selectedItem, previousSelectedItem);
- }
+ selectedItemWatchers.forEach(function (watcher) { watcher(selectedItem, previousSelectedItem); });
  }
 
  /**

src/components/chips/chips.spec.js

@@ -163,6 +163,7 @@ describe('<md-chips>', function() {
 
  expect(scope.items.length).toBe(4);
  expect(scope.items[3]).toBe('Kiwi');
+ expect(element.find('input').val()).toBe('');
  }));
  });