fix(uiSelectController): invoke onRemove callback method for single select on clear selection

Closes #1225

Author: kuuurt13

src/uiSelectController.js

@@ -454,9 +454,16 @@ uis.controller('uiSelectCtrl',
   };
 
   ctrl.clear = function($event) {
+    var locals = {};
+    locals[ctrl.parserResult.itemName] = ctrl.selected;
+
     ctrl.select(null);
     $event.stopPropagation();
     $timeout(function() {
+      ctrl.onRemoveCallback($scope, {
+        $item: ctrl.items[ctrl.activeIndex],
+        $model: ctrl.parserResult.modelMapper($scope, locals)
+      });
       ctrl.focusser[0].focus();
     }, 0, false);
   };

test/select.spec.js

@@ -174,6 +174,7 @@ describe('ui-select tests', function () {
       if (attrs.backspaceReset !== undefined) { attrsHtml += ' backspace-reset="' + attrs.backspaceReset + '"'; }
       if (attrs.uiDisableChoice !== undefined) { choicesAttrsHtml += ' ui-disable-choice="' + attrs.uiDisableChoice + '"'; }
       if (attrs.removeSelected !== undefined) { attrsHtml += ' remove-selected="' + attrs.removeSelected + '"'; }
+      if (attrs.onRemove !== undefined) { attrsHtml += ' on-remove="' + attrs.onRemove + '"'; }
     }
 
     return compileTemplate(
@@ -1369,6 +1370,27 @@ describe('ui-select tests', function () {
 
   });
 
+  it('should invoke remove callback on remove for single select with allowClear enabled', function () {
+    scope.selection.selected = scope.people[5];
+
+    scope.onRemoveFn = function ($item, $model) {
+      scope.$item = $item;
+      scope.$model = $model;
+    };
+
+    var el = createUiSelect({ onRemove: 'onRemoveFn($item, $model)', allowClear: true });
+
+    expect(scope.$item).toBeFalsy();
+    expect(scope.$model).toBeFalsy();
+
+    el.find('.glyphicon.glyphicon-remove').click();
+    $timeout.flush();
+
+    expect(scope.$item).toEqual(scope.people[5]);
+    expect(scope.$model).toEqual(scope.$item);
+
+  });
+
   it('should set $item & $model correctly when invoking callback on remove and no single prop. binding', function () {
 
     scope.onRemoveFn = function ($item, $model, $label) {