Object become empty in flushed object inside test

Describe the bug

When running tests not empty objects replaced with empty objects. From what I tested it seems the use of an array causes this.

To Reproduce Steps to reproduce the behavior:

Run the test below.

import { TestBed } from '@angular/core/testing';
import {
  ApolloTestingModule,
  ApolloTestingController,
} from 'apollo-angular/testing';
import { Apollo, gql } from 'apollo-angular';

describe('UndefinedSpec', () => {
  let controller: ApolloTestingController;

  beforeEach(() => {
    TestBed.configureTestingModule({
      imports: [ApolloTestingModule]
    });
    controller = TestBed.inject(ApolloTestingController);
  });

  afterEach(() => {

    // After every test, assert that there are no more pending requests.
    controller.verify();
  });

  it('undefined', (done) => {
    const apollo = TestBed.inject(Apollo);

    const TEST_QUERY = gql`
  query testQuery {
    responseEntity {
      body { ...TestObjFragment }
    }
  }
  fragment TestObjFragment on TestObj {
    id
  }
`;

    apollo.watchQuery({
      query: TEST_QUERY,
    }).valueChanges.subscribe(result => {
      const data = result.data as any;
      expect(data.responseEntity.body[0]).toBeTruthy();
      expect(data.responseEntity.body[0]).not.toEqual({});
      expect(data.responseEntity.body[0].id).toEqual(1);
      done();
    });

    const op = controller.expectOne('testQuery');

    op.flush({
      data: { responseEntity: { body: [ { id: 1, } ], }, },
    });
  });
});

Expected behavior

Test should pass.

Environment:

• @apollo/client: 3.3.7
• apollo-angular: 2.2.0
• graphql: 15.5.0
• @angular/core: 10.1.6
• @angular/cli: 10.1.7
• typescript: 4.0.5

Additional context

The same definition works just fine in the browser.

[nerg4l]

My bad I forgot to add __typename.

[Maximaximum]

@Urigo I’d love to, but unfortunately I’m too busy this week