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

test/ng/compileSpec.js

@@ -1496,6 +1496,96 @@ describe('$compile', function() {
           }
         ));
 
+        it('should pass the transcluded content through to ng-transclude', function() {
+
+          module(function($compileProvider) {
+            // This directive transcludes its contents and hopes to use the
+            // transcluded content in its template
+            $compileProvider.directive('transTest', valueFn({
+              templateUrl: 'transTestTemplate',
+              transclude: true
+            }));
+          });
+
+          inject(function($compile, $rootScope, $templateCache) {
+            // This is the template for the trans-test directive, it contains an
+            // ng-if, which also uses transclusion, which basically blocks the inner
+            // trans-test directive from receiving any transcluded content
+            $templateCache.put('transTestTemplate',
+              '  <div ng-if="true">'+
+              '    <div ng-transclude></div>'+
+              '</div>');
+
+            element = $compile('<div trans-test>transcluded content</div>')($rootScope);
+
+            // The ngTransclude:orphan error gets thrown when the digest occurs since this
+            // is when the ngTransclude directive tries to use the transcluded function.
+            $rootScope.$digest();
+
+            expect(element.text().trim()).toEqual('transcluded content');
+          });
+        });
+
+
+        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');
+          }));
+        });
+
+
 
         describe('nested transcludes', function() {