fix(md-contact-chips): support md-min-length on md-contact-chips. (#9215)

* fix(md-contact-chips): support md-min-length on md-contact-chips.

Add md-min-length to md-contact-chips and propagate attribute to md-autocomplete.
Add md-has-not-found=true attribute to md-autocomplete.

Fixes #2423.

* fix(md-contact-chips): remove md-has-not-found from md-autocomplete.

* fix(md-contact-chips): added test for md-min-length on md-contact-chips.

* fix(md-contact-chips): rename test for md-min-length on md-contact-chips.

Author: lievenjanssen

src/components/chips/contact-chips.spec.js

@@ -8,6 +8,7 @@ describe('<md-contact-chips>', function() {
           md-contact-image="image"\
           md-contact-email="email"\
           md-highlight-flags="i"\
+          md-min-length="1"\
           placeholder="To">\
       </md-contact-chips>';
 
@@ -85,6 +86,15 @@ describe('<md-contact-chips>', function() {
         expect(chip.find('img').length).toBe(0);
     });
 
+    it('should forward md-min-length attribute to the autocomplete', inject(function() {
+        var element = buildChips(CONTACT_CHIPS_TEMPLATE);
+
+        var autocompleteElement = element.find('md-autocomplete');
+        var autocompleteCtrl = autocompleteElement.controller('mdAutocomplete');
+
+        expect(autocompleteCtrl.scope.minLength).toBe(parseInt(element.attr('md-min-length')));
+      }));
+
     describe('filtering selected items', function() {
       it('should filter', inject(function() {
         scope.querySearch = jasmine.createSpy('querySearch').and.callFake(function(q) {

src/components/chips/js/contactChipsDirective.js

@@ -29,6 +29,8 @@ angular
  *    contact's email address.
  * @param {string} md-contact-image The field name of the contact object representing the
  *    contact's image.
+ * @param {number=} md-min-length Specifies the minimum length of text before autocomplete will
+ *    make suggestions
  *
  *
  * @param {expression=} filter-selected Whether to filter selected contacts from the list of
@@ -63,6 +65,7 @@ var MD_CONTACT_CHIPS_TEMPLATE = '\
               md-items="item in $mdContactChipsCtrl.queryContact($mdContactChipsCtrl.searchText)"\
               md-item-text="$mdContactChipsCtrl.itemName(item)"\
               md-no-cache="true"\
+              md-min-length="$mdContactChipsCtrl.minLength"\
               md-autoselect\
               placeholder="{{$mdContactChipsCtrl.contacts.length == 0 ?\
                   $mdContactChipsCtrl.placeholder : $mdContactChipsCtrl.secondaryPlaceholder}}">\
@@ -118,6 +121,7 @@ function MdContactChips($mdTheming, $mdUtil) {
       contactEmail: '@mdContactEmail',
       contacts: '=ngModel',
       requireMatch: '=?mdRequireMatch',
+      minLength: '=?mdMinLength',
       highlightFlags: '@?mdHighlightFlags'
     }
   };