allow nested defers at the same level

Author: yaacovCR

src/execution/__tests__/defer-test.ts

@@ -355,28 +355,32 @@ describe('Execute: defer directive', () => {
         data: {
           hero: {},
         },
-        pending: [
-          { id: '0', path: ['hero'], label: 'DeferTop' },
-          { id: '1', path: ['hero'], label: 'DeferNested' },
-        ],
+        pending: [{ id: '0', path: ['hero'], label: 'DeferTop' }],
         hasNext: true,
       },
       {
+        pending: [{ id: '1', path: ['hero'], label: 'DeferNested' }],
         incremental: [
           {
             data: {
               id: '1',
             },
             id: '0',
           },
+        ],
+        completed: [{ id: '0' }],
+        hasNext: true,
+      },
+      {
+        incremental: [
           {
             data: {
               friends: [{ name: 'Han' }, { name: 'Leia' }, { name: 'C-3PO' }],
             },
             id: '1',
           },
         ],
-        completed: [{ id: '0' }, { id: '1' }],
+        completed: [{ id: '1' }],
         hasNext: false,
       },
     ]);

src/execution/collectFields.ts

@@ -123,7 +123,6 @@ function collectFieldsImpl(
   context: CollectFieldsContext,
   selectionSet: SelectionSetNode,
   groupedFieldSet: AccumulatorMap<string, FieldDetails>,
-  parentDeferUsage?: DeferUsage,
   deferUsage?: DeferUsage,
 ): void {
   const {
@@ -143,7 +142,7 @@ function collectFieldsImpl(
         }
         groupedFieldSet.add(getFieldEntryKey(selection), {
           node: selection,
-          deferUsage: deferUsage ?? parentDeferUsage,
+          deferUsage,
         });
         break;
       }
@@ -159,14 +158,13 @@ function collectFieldsImpl(
           operation,
           variableValues,
           selection,
-          parentDeferUsage,
+          deferUsage,
         );
 
         collectFieldsImpl(
           context,
           selection.selectionSet,
           groupedFieldSet,
-          parentDeferUsage,
           newDeferUsage ?? deferUsage,
         );
 
@@ -179,7 +177,7 @@ function collectFieldsImpl(
           operation,
           variableValues,
           selection,
-          parentDeferUsage,
+          deferUsage,
         );
 
         if (
@@ -205,7 +203,6 @@ function collectFieldsImpl(
           context,
           fragment.selectionSet,
           groupedFieldSet,
-          parentDeferUsage,
           newDeferUsage ?? deferUsage,
         );
         break;