test($compile): nested transcludes are passing down tree

If you have two directives that both expect to receive transcluded content
the outer directive works but the inner directive never receives a
transclusion function, only if the first transclude directive is not
the first directive found in compilation.

See angular#7240

Author: petebacondarwin

test/ng/compileSpec.js

@@ -1497,6 +1497,66 @@ describe('$compile', function() {
         ));
 
 
+        describe('nested transcludes', function() {
+
+          beforeEach(module(function($compileProvider) {
+
+            $compileProvider.directive('noop', valueFn({}));
+
+            $compileProvider.directive('t1', valueFn({
+              template: '<div noop><div t2><div ng-transclude></div></div></div>',
+              transclude: true
+            }));
+
+            $compileProvider.directive('t2', valueFn({
+              template: '<div ng-transclude></div>',
+              transclude: true
+            }));
+
+            $compileProvider.directive('t1a', valueFn({
+              templateUrl: 't1a',
+              transclude: true
+            }));
+
+            $compileProvider.directive('t1b', valueFn({
+              templateUrl: 't1b',
+              transclude: true
+            }));
+
+            $compileProvider.directive('t2a', valueFn({
+              templateUrl: 't2a',
+              transclude: true
+            }));
+          }));
+
+          beforeEach(inject(function($templateCache) {
+            $templateCache.put('t1a', '<div noop><div t2><div ng-transclude></div></div></div>');
+            $templateCache.put('t1b', '<div noop><div t2a><div ng-transclude></div></div></div>');
+            $templateCache.put('t2a', '<div ng-transclude></div>');
+          }));
+
+
+          it('should allow nested transclude directives with sync templates', inject(function($compile, $rootScope) {
+            element = $compile('<div t1>transcluded content</div>')($rootScope);
+            $rootScope.$digest();
+            expect(element.text().trim()).toEqual('transcluded content');
+          }));
+
+          it('should allow nested transclude directives with sync templates', inject(function($compile, $rootScope) {
+            element = $compile('<div t1a>transcluded content</div>')($rootScope);
+            $rootScope.$digest();
+            expect(element.text().trim()).toEqual('transcluded content');
+          }));
+
+          it('should allow nested transclude directives with sync templates', inject(function($compile, $rootScope) {
+            element = $compile('<div t1b>transcluded content</div>')($rootScope);
+            $rootScope.$digest();
+            expect(element.text().trim()).toEqual('transcluded content');
+          }));
+        });
+
+
+
         it("should fail if replacing and template doesn't have a single root element", function() {
           module(function($exceptionHandlerProvider) {
             $exceptionHandlerProvider.mode('log');