Subject: [PATCH] trying to test
---
Index: packages/delegate/tests/finalizeGatewayRequest.break.test.ts
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/packages/delegate/tests/finalizeGatewayRequest.break.test.ts b/packages/delegate/tests/finalizeGatewayRequest.break.test.ts
new file mode 100644
--- /dev/null	(date 1672844770246)
+++ b/packages/delegate/tests/finalizeGatewayRequest.break.test.ts	(date 1672844770246)
@@ -0,0 +1,70 @@
+import { print, parse } from 'graphql';
+import { DelegationContext } from '@graphql-tools/delegate';
+import { bookingSchema } from '../../testing/fixtures/schemas.js';
+import { finalizeGatewayRequest } from '../src/finalizeGatewayRequest.js';
+
+describe('finalizeGatewayRequest', () => {
+  test('should remove empty selection sets on objects', () => {
+    const query = parse(/* GraphQL */ `
+      mutation MyMutation {
+        testMutation {
+          query {
+            ...FooingFragment
+          }
+        }
+      }
+
+      fragment FooingFragment on Query {
+        foo {
+          ... on Fooing {
+            pk
+          }
+          ... on Bar {
+            bar
+          }
+
+          ... on Baz {
+            baz
+          }
+        }
+      }
+    `);
+    const filteredQuery = finalizeGatewayRequest(
+      {
+        document: query,
+        variables: {},
+      },
+      {
+        targetSchema: bookingSchema,
+      } as DelegationContext
+    );
+
+    const expected = parse(/* GraphQL */ `
+      mutation MyMutation {
+        testMutation {
+          query {
+            ...FooingFragment
+          }
+        }
+      }
+
+      fragment FooingFragment on Query {
+        foo {
+          ... on Fooing {
+            pk
+            __typename
+          }
+          ... on Bar {
+            bar
+          }
+
+          ... on Baz {
+            baz
+          }
+          __typename
+        }
+      }
+    `);
+    expect(print(filteredQuery.document)).toBe(print(expected));
+  });
+});
Index: packages/testing/fixtures/schemas.ts
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/packages/testing/fixtures/schemas.ts b/packages/testing/fixtures/schemas.ts
--- a/packages/testing/fixtures/schemas.ts	(revision e7fe51cda2759232c90b6701ea11811d3a34cb18)
+++ b/packages/testing/fixtures/schemas.ts	(date 1672834191738)
@@ -489,12 +489,26 @@
     licensePlate: String
   }
 
+  interface Fooing {
+    pk: ID
+  }
+
+  type Bar implements Fooing {
+    pk: ID
+    bar: String
+  }
+  type Baz implements Fooing {
+    pk: ID
+    baz: String
+  }
+
   type Query {
     bookingById(id: ID!): Booking
     bookingsByPropertyId(propertyId: ID!, limit: Int): [Booking!]
     customerById(id: ID!): Customer
     bookings(limit: Int): [Booking!]
     customers(limit: Int): [Customer!]
+    foo: Fooing
   }
 
   input BookingInput {
@@ -504,8 +518,13 @@
     endTime: DateTime!
   }
 
+  type TMReturn {
+    query: Query
+  }
+
   type Mutation {
     addBooking(input: BookingInput): Booking
+    testMutation(input: ID): TMReturn
   }
 `;
 
@@ -535,6 +554,12 @@
       const list = Object.values(sampleData.Customer);
       return limit ? list.slice(0, limit) : list;
     },
+    foo(_parent) {
+      return {
+        pk: 'ID',
+        baz: 'baz',
+      };
+    },
   },
 
   Mutation: {
@@ -547,6 +572,16 @@
         endTime,
       };
     },
+    testMutation(_parent) {
+      return {
+        query: {
+          important: {
+            pk: 'ID',
+            baz: 'baz',
+          },
+        },
+      };
+    },
   },
 
   Booking: {