cloud_firestore_behaviors fail when casting to Map<String, dynamic>

gistfile1.txt

flutter: 00:00 +0: Firestore behavior comparison: Document creation by add (Cloud Firestore)
VMServiceFlutterDriver: Connected to Flutter application.
        path: satisfied (Path is satisfied), interface: en1
flutter: 00:01 +1: Firestore behavior comparison: Document creation by add (Firestore Emulator)
        path: satisfied (Path is satisfied), interface: en1
flutter: 00:01 +2: Firestore behavior comparison: Document creation by add (cloud_firestore_mocks)
flutter: 00:01 +3: Firestore behavior comparison: Invalidate bad values (Cloud Firestore)
flutter: 00:01 +4: Firestore behavior comparison: Invalidate bad values (Firestore Emulator)
flutter: 00:01 +5: Firestore behavior comparison: Invalidate bad values (cloud_firestore_mocks)
flutter: 00:01 +6: Firestore behavior comparison: Array containing a cycle (Cloud Firestore)
flutter: 00:01 +7: Firestore behavior comparison: Array containing a cycle (Firestore Emulator)
flutter: 00:01 +8: Firestore behavior comparison: Array containing a cycle (cloud_firestore_mocks)
flutter: 00:01 +9: Firestore behavior comparison: Document creation by setData (Cloud Firestore)
flutter: 00:02 +9: Firestore behavior comparison: Document creation by setData (Cloud Firestore) [E]
flutter:   type '_InternalLinkedHashMap<dynamic, dynamic>' is not a subtype of type 'Map<String, dynamic>' in type cast
flutter:   Users/anhtuan/git/cloud_firestore_mocks/test_driver/cloud_firestore_behaviors.dart 138:43  main.<fn>.<fn>
  ===== asynchronous gap ===========================
  dart:async/zone.dart 1064:19                                                               _CustomZone.registerBinaryCallback
  dart:async-patch/async_patch.dart 84:23                                                    _asyncErrorWrapperHelper
  package:test_api/src/backend/invoker.dart                                                  Invoker.waitForOutstandingCallbacks.<fn>
  dart:async/zone.dart 1126:13                                                               _rootRun
  dart:async/zone.dart 1023:19                                                               _CustomZone.run
  dart:async/zone.dart 1518:10                                                               _runZoned
  dart:async/zone.dart 1465:12                                                               runZoned
  package:test_api/src/backend/invoker.dart<…>
flutter: 00:02 +9 -1: Firestore behavior comparison: Document creation by setData (Firestore Emulator)
flutter: 00:02 +9 -1: Firestore behavior comparison: Document creation by setData (Firestore Emulator) [E]
flutter:   type '_InternalLinkedHashMap<dynamic, dynamic>' is not a subtype of type 'Map<String, dynamic>' in type cast
flutter:   Users/anhtuan/git/cloud_firestore_mocks/test_driver/cloud_firestore_behaviors.dart 138:43  main.<fn>.<fn>
  ===== asynchronous gap ===========================
  dart:async/zone.dart 1064:19                                                               _CustomZone.registerBinaryCallback
  dart:async-patch/async_patch.dart 84:23                                                    _asyncErrorWrapperHelper
  package:test_api/src/backend/invoker.dart                                                  Invoker.waitForOutstandingCallbacks.<fn>
  dart:async/zone.dart 1126:13                                                               _rootRun
  dart:async/zone.dart 1023:19                                                               _CustomZone.run
  dart:async/zone.dart 1518:10                                                               _runZoned
  dart:async/zone.dart 1465:12                                                               runZoned
  package:test_api/src/backend/invoker.dart<…>
flutter: 00:02 +9 -2: Firestore behavior comparison: Document creation by setData (cloud_firestore_mocks)
flutter: 00:02 +10 -2: Firestore behavior comparison: Documents should be saved separately (Cloud Firestore)
flutter: 00:05 +10 -2: Firestore behavior comparison: Documents should be saved separately (Cloud Firestore) [E]
flutter:   type '_InternalLinkedHashMap<dynamic, dynamic>' is not a subtype of type 'Map<String, dynamic>' in type cast
flutter:   Users/anhtuan/git/cloud_firestore_mocks/test_driver/cloud_firestore_behaviors.dart 223:41  main.<fn>.<fn>
  ===== asynchronous gap ===========================
  dart:async/zone.dart 1064:19                                                               _CustomZone.registerBinaryCallback
  dart:async-patch/async_patch.dart 84:23                                                    _asyncErrorWrapperHelper
  package:test_api/src/backend/invoker.dart                                                  Invoker.waitForOutstandingCallbacks.<fn>
  dart:async/zone.dart 1126:13                                                               _rootRun
  dart:async/zone.dart 1023:19                                                               _CustomZone.run
  dart:async/zone.dart 1518:10                                                               _runZoned
  dart:async/zone.dart 1465:12                                                               runZoned
  package:test_api/src/backend/invoker.dart<…>
flutter: 00:05 +10 -3: Firestore behavior comparison: Documents should be saved separately (Firestore Emulator)
flutter: 00:05 +10 -3: Firestore behavior comparison: Documents should be saved separately (Firestore Emulator) [E]
flutter:   type '_InternalLinkedHashMap<dynamic, dynamic>' is not a subtype of type 'Map<String, dynamic>' in type cast
flutter:   Users/anhtuan/git/cloud_firestore_mocks/test_driver/cloud_firestore_behaviors.dart 223:41  main.<fn>.<fn>
  ===== asynchronous gap ===========================
  dart:async/zone.dart 1064:19                                                               _CustomZone.registerBinaryCallback
  dart:async-patch/async_patch.dart 84:23                                                    _asyncErrorWrapperHelper
  package:test_api/src/backend/invoker.dart                                                  Invoker.waitForOutstandingCallbacks.<fn>
  dart:async/zone.dart 1126:13                                                               _rootRun
  dart:async/zone.dart 1023:19                                                               _CustomZone.run
  dart:async/zone.dart 1518:10                                                               _runZoned
  dart:async/zone.dart 1465:12                                                               runZoned
  package:test_api/src/backend/invoker.dart<…>
flutter: 00:05 +10 -4: Firestore behavior comparison: Documents should be saved separately (cloud_firestore_mocks)
flutter: 00:05 +11 -4: Firestore behavior comparison: Timestamp field (Cloud Firestore)
flutter: 00:06 +12 -4: Firestore behavior comparison: Timestamp field (Firestore Emulator)
flutter: 00:06 +13 -4: Firestore behavior comparison: Timestamp field (cloud_firestore_mocks)
flutter: 00:06 +14 -4: Firestore behavior comparison: Unsaved documens (Cloud Firestore)
flutter: 00:06 +15 -4: Firestore behavior comparison: Unsaved documens (Firestore Emulator)
flutter: 00:06 +16 -4: Firestore behavior comparison: Unsaved documens (cloud_firestore_mocks)
flutter: 00:06 +17 -4: Firestore behavior comparison: Nested objects creation with updateData (Cloud Firestore)
flutter: 00:07 +17 -4: Firestore behavior comparison: Nested objects creation with updateData (Cloud Firestore) [E]
flutter:   type '_InternalLinkedHashMap<dynamic, dynamic>' is not a subtype of type 'Map<String, dynamic>' in type cast
flutter:   Users/anhtuan/git/cloud_firestore_mocks/test_driver/cloud_firestore_behaviors.dart 288:44  main.<fn>.<fn>
  ===== asynchronous gap ===========================
  dart:async/zone.dart 1064:19                                                               _CustomZone.registerBinaryCallback
  dart:async-patch/async_patch.dart 84:23                                                    _asyncErrorWrapperHelper
  package:test_api/src/backend/invoker.dart                                                  Invoker.waitForOutstandingCallbacks.<fn>
  dart:async/zone.dart 1126:13                                                               _rootRun
  dart:async/zone.dart 1023:19                                                               _CustomZone.run
  dart:async/zone.dart 1518:10                                                               _runZoned
  dart:async/zone.dart 1465:12                                                               runZoned
  package:test_api/src/backend/invoker.dart<…>
flutter: 00:07 +17 -5: Firestore behavior comparison: Nested objects creation with updateData (Firestore Emulator)
flutter: 00:07 +17 -5: Firestore behavior comparison: Nested objects creation with updateData (Firestore Emulator) [E]
flutter:   type '_InternalLinkedHashMap<dynamic, dynamic>' is not a subtype of type 'Map<String, dynamic>' in type cast
flutter:   Users/anhtuan/git/cloud_firestore_mocks/test_driver/cloud_firestore_behaviors.dart 288:44  main.<fn>.<fn>
  ===== asynchronous gap ===========================
  dart:async/zone.dart 1064:19                                                               _CustomZone.registerBinaryCallback
  dart:async-patch/async_patch.dart 84:23                                                    _asyncErrorWrapperHelper
  package:test_api/src/backend/invoker.dart                                                  Invoker.waitForOutstandingCallbacks.<fn>
  dart:async/zone.dart 1126:13                                                               _rootRun
  dart:async/zone.dart 1023:19                                                               _CustomZone.run
  dart:async/zone.dart 1518:10                                                               _runZoned
  dart:async/zone.dart 1465:12                                                               runZoned
  package:test_api/src/backend/invoker.dart<…>
flutter: 00:07 +17 -6: Firestore behavior comparison: Nested objects creation with updateData (cloud_firestore_mocks)
flutter: 00:07 +18 -6: Firestore behavior comparison: Nested objects update (Cloud Firestore)
flutter: 00:09 +19 -6: Firestore behavior comparison: Nested objects update (Firestore Emulator)
flutter: 00:09 +20 -6: Firestore behavior comparison: Nested objects update (cloud_firestore_mocks)
flutter: 00:09 +21 -6: Firestore behavior comparison: Snapshot should not be affected by updates (Cloud Firestore)
flutter: 00:10 +21 -6: Firestore behavior comparison: Snapshot should not be affected by updates (Cloud Firestore) [E]
flutter:   type '_InternalLinkedHashMap<dynamic, dynamic>' is not a subtype of type 'Map<String, dynamic>' in type cast
flutter:   Users/anhtuan/git/cloud_firestore_mocks/test_driver/cloud_firestore_behaviors.dart 339:46  main.<fn>.<fn>
  ===== asynchronous gap ===========================
  dart:async/zone.dart 1064:19                                                               _CustomZone.registerBinaryCallback
  dart:async-patch/async_patch.dart 84:23                                                    _asyncErrorWrapperHelper
  package:test_api/src/backend/invoker.dart                                                  Invoker.waitForOutstandingCallbacks.<fn>
  dart:async/zone.dart 1126:13                                                               _rootRun
  dart:async/zone.dart 1023:19                                                               _CustomZone.run
  dart:async/zone.dart 1518:10                                                               _runZoned
  dart:async/zone.dart 1465:12                                                               runZoned
  package:test_api/src/backend/invoker.dart<…>
flutter: 00:10 +21 -7: Firestore behavior comparison: Snapshot should not be affected by updates (Firestore Emulator)
flutter: 00:10 +21 -7: Firestore behavior comparison: Snapshot should not be affected by updates (Firestore Emulator) [E]
flutter:   type '_InternalLinkedHashMap<dynamic, dynamic>' is not a subtype of type 'Map<String, dynamic>' in type cast
flutter:   Users/anhtuan/git/cloud_firestore_mocks/test_driver/cloud_firestore_behaviors.dart 339:46  main.<fn>.<fn>
  ===== asynchronous gap ===========================
  dart:async/zone.dart 1064:19                                                               _CustomZone.registerBinaryCallback
  dart:async-patch/async_patch.dart 84:23                                                    _asyncErrorWrapperHelper
  package:test_api/src/backend/invoker.dart                                                  Invoker.waitForOutstandingCallbacks.<fn>
  dart:async/zone.dart 1126:13                                                               _rootRun
  dart:async/zone.dart 1023:19                                                               _CustomZone.run
  dart:async/zone.dart 1518:10                                                               _runZoned
  dart:async/zone.dart 1465:12                                                               runZoned
  package:test_api/src/backend/invoker.dart<…>
flutter: 00:10 +21 -8: Firestore behavior comparison: Snapshot should not be affected by updates (cloud_firestore_mocks)
flutter: 00:10 +22 -8: Firestore behavior comparison: Transaction: get, set, update, and delete (Cloud Firestore)
flutter: 00:12 +22 -8: Firestore behavior comparison: Transaction: get, set, update, and delete (Cloud Firestore) [E]
flutter:   type '_InternalLinkedHashMap<dynamic, dynamic>' is not a subtype of type 'Map<String, dynamic>' in type cast
flutter:   Users/anhtuan/git/cloud_firestore_mocks/test_driver/cloud_firestore_behaviors.dart 371:45  main.<fn>.<fn>
  ===== asynchronous gap ===========================
  dart:async/zone.dart 1064:19                                                               _CustomZone.registerBinaryCallback
  dart:async-patch/async_patch.dart 84:23                                                    _asyncErrorWrapperHelper
  package:test_api/src/backend/invoker.dart                                                  Invoker.waitForOutstandingCallbacks.<fn>
  dart:async/zone.dart 1126:13                                                               _rootRun
  dart:async/zone.dart 1023:19                                                               _CustomZone.run
  dart:async/zone.dart 1518:10                                                               _runZoned
  dart:async/zone.dart 1465:12                                                               runZoned
  package:test_api/src/backend/invoker.dart<…>
flutter: 00:12 +22 -9: Firestore behavior comparison: Transaction: get, set, update, and delete (Firestore Emulator)
flutter: 00:12 +22 -9: Firestore behavior comparison: Transaction: get, set, update, and delete (Firestore Emulator) [E]
flutter:   type '_InternalLinkedHashMap<dynamic, dynamic>' is not a subtype of type 'Map<String, dynamic>' in type cast
flutter:   Users/anhtuan/git/cloud_firestore_mocks/test_driver/cloud_firestore_behaviors.dart 371:45  main.<fn>.<fn>
  ===== asynchronous gap ===========================
  dart:async/zone.dart 1064:19                                                               _CustomZone.registerBinaryCallback
  dart:async-patch/async_patch.dart 84:23                                                    _asyncErrorWrapperHelper
  package:test_api/src/backend/invoker.dart                                                  Invoker.waitForOutstandingCallbacks.<fn>
  dart:async/zone.dart 1126:13                                                               _rootRun
  dart:async/zone.dart 1023:19                                                               _CustomZone.run
  dart:async/zone.dart 1518:10                                                               _runZoned
  dart:async/zone.dart 1465:12                                                               runZoned
  package:test_api/src/backend/invoker.dart<…>
flutter: 00:12 +22 -10: Firestore behavior comparison: Transaction: get, set, update, and delete (cloud_firestore_mocks)
flutter: 00:12 +23 -10: Firestore behavior comparison: Transaction handler returning void result (Cloud Firestore)
        [C1.1 560515B7-BCD9-4C23-A942-7B570CCFF6A1 192.168.86.21:54868<->172.217.161.46:443]
        Connected Path: satisfied (Path is satisfied), interface: en1
        Duration: 0.206s, DNS @0.001s took 0.001s, TCP @0.003s took 0.039s, TLS took 0.083s
        bytes in/out: 4192/1022, packets in/out: 8/9, rtt: 0.036s, retransmitted packets: 0, out-of-order packets: 0
flutter: 00:13 +24 -10: Firestore behavior comparison: Transaction handler returning void result (Firestore Emulator)
flutter: 00:13 +25 -10: Firestore behavior comparison: Transaction handler returning void result (cloud_firestore_mocks)
flutter: 00:13 +26 -10: Firestore behavior comparison: Transaction handler returning non-map result (Cloud Firestore)
        [C2.1 2CC7193F-AB90-4757-9F64-A1F2EFC90286 192.168.86.21:54869<->172.217.161.46:443]
        Connected Path: satisfied (Path is satisfied), interface: en1
        Duration: 0.194s, DNS @0.000s took 0.002s, TCP @0.002s took 0.040s, TLS took 0.082s
        bytes in/out: 3877/1518, packets in/out: 8/10, rtt: 0.036s, retransmitted packets: 0, out-of-order packets: 0
flutter: 00:14 +26 -10: Firestore behavior comparison: Transaction handler returning non-map result (Cloud Firestore) [E]
flutter:   Expected: throws <Instance of 'TypeError'>
    Actual: <Closure: () => Future<dynamic>>
     Which: threw _CastError:<type 'int' is not a subtype of type 'Map<dynamic, dynamic>' in type cast>
            stack package:flutter/src/services/platform_channel.dart 156:41                                 MethodChannel._invokeMethod
                  ===== asynchronous gap ===========================
                  package:test_api                                                                          expect
                  package:flutter_test/src/widget_tester.dart 348:3                                         expect
                  Users/anhtuan/git/cloud_firestore_mocks/test_driver/cloud_firestore_behaviors.dart 411:7  main.<fn>.<fn>
                  dart:async                                                                                _completeOnAsyncReturn
                  package:flutter/src/services/platform_channel.dart                                        MethodCha<…>
flutter:   package:test_api/src/frontend/expect.dart 154:30                                          fail
  package:test_api/src/frontend/expect.dart 128:9                                           _expect.<fn>
  package:stack_trace/src/stack_zone_specification.dart 129:26                              StackZoneSpecification._registerUnaryCallback.<fn>.<fn>
  package:stack_trace/src/stack_zone_specification.dart 209:15                              StackZoneSpecification._run
  package:stack_trace/src/stack_zone_specification.dart 129:14                              StackZoneSpecification._registerUnaryCallback.<fn>
  dart:async/zone.dart 1134:38                                                              _rootRunUnary
  dart:async/zone.dart 1031:19                                                              _CustomZone.runUnary
  dart:async/future_impl.dart 140:18                                                        _FutureListener.handleValue
  dart:async/future_impl.dart 682:45            <…>
flutter: 00:14 +26 -11: Firestore behavior comparison: Transaction handler returning non-map result (Firestore Emulator)
flutter: 00:14 +26 -11: Firestore behavior comparison: Transaction handler returning non-map result (Firestore Emulator) [E]
flutter:   Expected: throws <Instance of 'TypeError'>
    Actual: <Closure: () => Future<dynamic>>
     Which: threw _CastError:<type 'int' is not a subtype of type 'Map<dynamic, dynamic>' in type cast>
            stack package:flutter/src/services/platform_channel.dart 156:41                                 MethodChannel._invokeMethod
                  ===== asynchronous gap ===========================
                  package:test_api                                                                          expect
                  package:flutter_test/src/widget_tester.dart 348:3                                         expect
                  Users/anhtuan/git/cloud_firestore_mocks/test_driver/cloud_firestore_behaviors.dart 411:7  main.<fn>.<fn>
                  dart:async                                                                                _completeOnAsyncReturn
                  package:flutter/src/services/platform_channel.dart                                        MethodCha<…>
flutter:   package:test_api/src/frontend/expect.dart 154:30                                          fail
  package:test_api/src/frontend/expect.dart 128:9                                           _expect.<fn>
  package:stack_trace/src/stack_zone_specification.dart 129:26                              StackZoneSpecification._registerUnaryCallback.<fn>.<fn>
  package:stack_trace/src/stack_zone_specification.dart 209:15                              StackZoneSpecification._run
  package:stack_trace/src/stack_zone_specification.dart 129:14                              StackZoneSpecification._registerUnaryCallback.<fn>
  dart:async/zone.dart 1134:38                                                              _rootRunUnary
  dart:async/zone.dart 1031:19                                                              _CustomZone.runUnary
  dart:async/future_impl.dart 140:18                                                        _FutureListener.handleValue
  dart:async/future_impl.dart 682:45            <…>
flutter: 00:14 +26 -12: Firestore behavior comparison: Transaction handler returning non-map result (cloud_firestore_mocks)
flutter: 00:14 +27 -12: Firestore behavior comparison: Transaction: reads must come before writes (Cloud Firestore)
flutter: 00:15 +28 -12: Firestore behavior comparison: Transaction: reads must come before writes (Firestore Emulator)
flutter: 00:15 +29 -12: Firestore behavior comparison: Transaction: reads must come before writes (cloud_firestore_mocks)
flutter: 00:15 +30 -12: Firestore behavior comparison: Transaction: result map with invalid types (Cloud Firestore)
flutter: 00:15 +31 -12: Firestore behavior comparison: Transaction: result map with invalid types (Firestore Emulator)
flutter: 00:15 +32 -12: Firestore behavior comparison: Transaction: result map with invalid types (cloud_firestore_mocks)
flutter: 00:15 +33 -12: Firestore behavior comparison: Transaction: result map with valid types (Cloud Firestore)
flutter: 00:15 +34 -12: Firestore behavior comparison: Transaction: result map with valid types (Firestore Emulator)
flutter: 00:15 +35 -12: Firestore behavior comparison: Transaction: result map with valid types (cloud_firestore_mocks)
flutter: 00:15 +36 -12: (tearDownAll)
flutter: 00:15 +37 -12: Some tests failed.
Stopping application instance.