feat(modal): allow templateUrl to be a function

Fixes #2296

src/modal/modal.js

@@ -303,8 +303,9 @@ angular.module('ui.bootstrap.modal', ['ui.bootstrap.transition'])
 
           function getTemplatePromise(options) {
             return options.template ? $q.when(options.template) :
-              $http.get(options.templateUrl, {cache: $templateCache}).then(function (result) {
-                return result.data;
+              $http.get(angular.isFunction(options.templateUrl) ? (options.templateUrl)() : options.templateUrl,
+                {cache: $templateCache}).then(function (result) {
+                  return result.data;
               });
           }
 

src/modal/test/modal.spec.js

@@ -1,4 +1,4 @@
-describe('$modal', function () {
+ddescribe('$modal', function () {
   var $controllerProvider, $rootScope, $document, $compile, $templateCache, $timeout, $q;
   var $modal, $modalProvider;
 
@@ -280,6 +280,23 @@ describe('$modal', function () {
         expect($document).toHaveModalOpenWithContent('Whitespaces', 'div');
       });
 
+      it('should accept template as a function', function () {
+        open({template: function() {
+          return '<div>From a function</div>';
+        }});
+
+        expect($document).toHaveModalOpenWithContent('From a function', 'div');
+      });
+
+      it('should not fail if a templateUrl as a function', function () {
+
+        $templateCache.put('whitespace.html', '  <div>Whitespaces</div>  ');
+        open({templateUrl: function(){
+          return 'whitespace.html';
+        }});
+        expect($document).toHaveModalOpenWithContent('Whitespaces', 'div');
+      });
+
     });
 
     describe('controller', function () {