Null bubbling in shared grouped fieldset test

robrichard · Feb 16, 2024 · 3b12a9c · 3b12a9c
1 parent 9c90a23
commit 3b12a9c
Showing 1 changed file with 77 additions and 0 deletions.
diff --git a/src/execution/__tests__/defer-test.ts b/src/execution/__tests__/defer-test.ts
@@ -73,6 +73,7 @@ const hero = {
 const c = new GraphQLObjectType({
   fields: {
     d: { type: GraphQLString },
+    e: { type: GraphQLString },
     nonNullErrorField: { type: new GraphQLNonNull(GraphQLString) },
   },
   name: 'c',
@@ -1128,6 +1129,82 @@ describe('Execute: defer directive', () => {
     ]);
   });
 
+  it.only('Null bubbling in shared grouped fieldset', async () => {
+    const document = parse(`
+      query {
+        ... @defer(label: "A") {
+          a {
+            b {
+              c {
+                nonNullErrorField
+                e
+              }
+            }
+          }
+        }
+        ... @defer(label: "B") {
+          a {
+            b {
+              c {
+                nonNullErrorField
+                d
+              }
+            }
+          }
+        }
+      }
+    `);
+    const result = await complete(document, {
+      a: { b: { c: { d: 'd', e: 'e', nonNullErrorField: null } } },
+    });
+    console.log(JSON.stringify(result, null, 2));
+    expectJSON(result).toDeepEqual([
+      {
+        data: {
+          a: {},
+        },
+        pending: [
+          { id: '0', path: [], label: 'A' },
+          { id: '1', path: [], label: 'B' },
+        ],
+        hasNext: true,
+      },
+      {
+        incremental: [
+          {
+            data: { a: { b: { c: null } } },
+            id: '0',
+          },
+        ],
+        completed: [
+          {
+            id: '0',
+            errors: [
+              {
+                message:
+                  'Cannot return null for non-nullable field c.nonNullErrorField.',
+                locations: [{ line: 8, column: 17 }],
+                path: ['a', 'b', 'c', 'nonNullErrorField'],
+              },
+            ],
+          },
+          {
+            id: '1',
+            errors: [
+              {
+                message:
+                  'Cannot return null for non-nullable field c.nonNullErrorField.',
+                locations: [{ line: 8, column: 17 }],
+                path: ['a', 'b', 'c', 'nonNullErrorField'],
+              },
+            ],
+          },
+        ],
+        hasNext: false,
+      },
+    ]);
+  });
+
   it('Nulls cross defer boundaries, null first', async () => {
     const document = parse(`
       query {