Equatable comparison issue

[dlewis2017]

Description
I'm using freezed for most of my classes and when trying to test them via bloc_test I get the following error:
WARNING: Please ensure state instances extend Equatable, override == and hashCode, or implement Comparable. Alternatively, consider using Matchers in the expect of the blocTest rather than concrete state instances.
Among other error messages indicating that the objects are not equal. At first I thought the issue was with bloc_test not picking up the == override properly, but as I stepped through the code I noticed that trying to compare two objects with == return false, while converting those same objects to JSON and comparing them with == returns true
I believe I'm using the class as intended and will put snippets below.

Steps To Reproduce
I can't share exact code but I'll try to re-create structure. These steps also include full bloc_test steps but you may be able to create 2 Bloc/Cubit States with freezed and compare to reproduce.

1. Download dependencies

environment:
  sdk: ">=2.15.1 <3.0.0"

dependencies:
  flutter:
    sdk: flutter
  freezed_annotation: ^2.0.1
  json_annotation: ^4.5.0
  flutter_dotenv: ^5.0.2
  bloc: ^8.0.3
  flutter_bloc: ^8.0.1
  bloc_test: ^9.0.3
  mocktail: ^0.3.0
dev_dependencies:
  flutter_test:
    sdk: flutter

  flutter_lints: ^1.0.4
  build_runner: ^2.1.10
  freezed: ^2.0.3
  json_serializable: ^6.0.0
  ffigen: ^6.0.0

2. Create abstract class that is used as general state in cubit with corresponding immutable subclasses generated with freezed

part of 'scanner_cubit.dart';

abstract class ScannerStates {}
@freezed
abstract class InitialScannerState extends ScannerStates with _$InitialScannerState {
  const factory InitialScannerState(
      {required final ScannerSelection selection,
      @Default([]) final List<ScannerRow> rows,
      @Default(0) final int currentLayer,
      @Default(0.0) final double screenWidth,
      @Default(0.0) final double screenHeight,
      @Default(0.0) final double devicePixelRatio,
      @Default(false) final bool showCursor}) = _InitialScannerState;
...

3. run the builder to generate freezed files/classes: flutter packages pub run build_runner build
4. Create cubit with basic functionality and state manipulation that emits new state (one of subclasses mentioned above)
5. Create blocTest and expect updated state with specified values that will be changed upon calling a function (can use verify and convert to strings to test equality as well. expectedState can be replace with actual state or defined above in verify`)

build...
act.... (emit state)
expect: () => [expectedState] // Throws errors/fails test
verify: (cubit) => {
   ...
   print(cubit.state == expectedState); // return false and fails test
   print((cubit.state).toString() == expectedState.toString()); // Returns true and test succeeds

6. Run test and see error

Expected Behavior
2 states of the same type with same values to return true when compared with ==

Screenshots
N/A

Additional Context
Additional logs:

testBloc.<fn>.<fn>
package:bloc_test/src/bloc_test.dart:229
dart:async                                   _completeOnAsyncError
package:bloc_test/src/bloc_test.dart         testBloc.<fn>.<fn>
package:bloc_test/src/bloc_test.dart:1
===== asynchronous gap ===========================
dart:async                                   _asyncThenWrapperHelper
package:bloc_test/src/bloc_test.dart         testBloc.<fn>.<fn>
package:bloc_test/src/bloc_test.dart:1
dart:async                                   runZonedGuarded
testBloc.<fn>
package:bloc_test/src/bloc_test.dart:192
testBloc.<fn>
package:bloc_test/src/bloc_test.dart:191
dart:async                                   runZoned
BlocOverrides.runZoned
package:bloc/src/bloc_overrides.dart:46
testBloc
package:bloc_test/src/bloc_test.dart:190
blocTest.<fn>
package:bloc_test/src/bloc_test.dart:156
blocTest.<fn>
package:bloc_test/src/bloc_test.dart:155

[rrousselGit]

Freezed already overrides ==. So if == returns false, it's likely that your objects are different.

Try checking all the properties of your class individually, to see which one is different.

[dlewis2017]

Yup, thanks! @rrousselGit The freezed class was using a custom Class property that was using unfreezed, so I had to override the ==/hash of that class and it worked.