fix(uiSelectCtrl) calculateContainerWidth use width of ui-select-container

src/uiSelectController.js

@@ -522,7 +522,7 @@ uis.controller('uiSelectCtrl',
   ctrl.sizeSearchInput = function() {
 
     var input = ctrl.searchInput[0],
-        container = ctrl.searchInput.parent().parent()[0],
+        container = ctrl.$element[0],
         calculateContainerWidth = function() {
           // Return the container width only if the search input is visible
           return container.clientWidth * !!input.offsetParent;
@@ -531,7 +531,7 @@ uis.controller('uiSelectCtrl',
           if (containerWidth === 0) {
             return false;
           }
-          var inputWidth = containerWidth - input.offsetLeft - 10;
+          var inputWidth = containerWidth - input.offsetLeft;
           if (inputWidth < 50) inputWidth = containerWidth;
           ctrl.searchInput.css('width', inputWidth+'px');
           return true;

test/select.spec.js

@@ -2037,7 +2037,32 @@ describe('ui-select tests', function () {
 
     });
 
-    it('should move to last match when pressing BACKSPACE key from search', function () {
+    it('should update size of search input use container width', function() {
+      scope.selection.selectedMultiple = [scope.people[4], scope.people[5]]; //Wladimir & Samantha
+      var el = createUiSelectMultiple({
+        appendToBody: true
+      });
+
+      angular.element(document.body).css("width", "100%");
+      angular.element(document.body).css("height", "100%");
+      angular.element(document.body).append(el);
+
+      spyOn(el.scope().$select, 'sizeSearchInput');
+
+      var searchInput = el.find('.ui-select-search');
+      el.find('.ui-select-match-item').first().find('.ui-select-match-close').click();
+
+      expect(el.scope().$select.sizeSearchInput).toHaveBeenCalled();
+
+      $timeout.flush();
+
+      var newWidth = searchInput[0].clientWidth + searchInput[0].offsetLeft;
+      var containerWidth = el[0].clientWidth;
+      expect(containerWidth - newWidth).toBeLessThan(10);
+
+    });
+
+    it('should move to last match when pressing BACKSPACE key from search', function() {
 
       var el = createUiSelectMultiple();
       var searchInput = el.find('.ui-select-search');