fix($compile): denormalize directive templates

Since developers are allowed to customize start/end interpolation
strings, but third-party directive creators don't know about these
customizations, we should standardize on {{ }} in templates of
reusable (third-party) directives. During the compilation, these
templates are then denormalized to use whatever the custom
start/end symbol is, effectively translating the template into the
syntax of the runtime environment.

This addresses an issue raised at http://goo.gl/e8VPV

Existing code should not be affected by this change since project
that do use custom interpolation markers are not expected to use
{{ }} in existing directive templates.

1 files changed, 41 insertions, 0 deletions

diff --git a/test/ng/compileSpec.js b/test/ng/compileSpec.js
index cbf84a38..3d6144ac 100644
--- a/test/ng/compileSpec.js
+++ b/test/ng/compileSpec.js
@@ -1372,6 +1372,47 @@ describe('$compile', function() {
                   '<option>Greet Misko!</option>' +
                 '</select>');
     }));
+
+
+    it('should support custom start/end interpolation symbols in template and directive template',
+        function() {
+      module(function($interpolateProvider, $compileProvider) {
+        $interpolateProvider.startSymbol('##').endSymbol(']]');
+        $compileProvider.directive('myDirective', function() {
+          return {
+            template: '<span>{{hello}}|{{hello|uppercase}}</span>'
+          };
+        });
+      });
+
+      inject(function($compile, $rootScope) {
+        element = $compile('<div>##hello|uppercase]]|<div my-directive></div></div>')($rootScope);
+        $rootScope.hello = 'ahoj';
+        $rootScope.$digest();
+        expect(element.text()).toBe('AHOJ|ahoj|AHOJ');
+      });
+    });
+
+
+    it('should support custom start/end interpolation symbols in async directive template',
+        function() {
+      module(function($interpolateProvider, $compileProvider) {
+        $interpolateProvider.startSymbol('##').endSymbol(']]');
+        $compileProvider.directive('myDirective', function() {
+          return {
+            templateUrl: 'myDirective.html'
+          };
+        });
+      });
+
+      inject(function($compile, $rootScope, $templateCache) {
+        $templateCache.put('myDirective.html', '<span>{{hello}}|{{hello|uppercase}}</span>');
+        element = $compile('<div>##hello|uppercase]]|<div my-directive></div></div>')($rootScope);
+        $rootScope.hello = 'ahoj';
+        $rootScope.$digest();
+        expect(element.text()).toBe('AHOJ|ahoj|AHOJ');
+      });
+    });
   });