How to perform equality check?

[2shrestha22]

This test fails. Would anyone tell me about what I am doing wrong?

void main() {
  late SubscriptionPlan subscriptionPlan;

  setUp(() {
    subscriptionPlan = SubscriptionPlan.trial();
  });

  test(
    'isTrial works',
    () {
      expect(subscriptionPlan.isTrial(), true);
    },
  );
}

@freezed
class SubscriptionPlan with _$SubscriptionPlan {
  const SubscriptionPlan._();

  /// Plans that user can subscribe to
  const factory SubscriptionPlan({
    required ProductDetails productDetails,
  }) = _SubscriptionPlan;

  factory SubscriptionPlan.trial() => SubscriptionPlan(
        productDetails: ProductDetails(
          id: '',
          title: '7 day free trial',
          description: 'free',
          price: 'free',
          rawPrice: 0,
          currencyCode: '',
        ),
      );

  String get id => productDetails.id;
  String get title => productDetails.title;
  String get price => productDetails.price;
  String get description => productDetails.description;

  bool isTrial() => this == SubscriptionPlan.trial();
}

class ProductDetails {
  ProductDetails({
    required this.id,
    required this.title,
    required this.description,
    required this.price,
    required this.rawPrice,
    required this.currencyCode,
    this.currencySymbol = '',
  });

  final String id;
  final String title;
  final String description;
  final String price;
  final double rawPrice;
  final String currencyCode;
  final String currencySymbol;
}

[rrousselGit]

Your Product Detail class does not override ==

[2shrestha22]

Can we achieve this without overriding == in ProductDetail class? Is there any way?

[rrousselGit]

Add a const constructor to your ProductDetail and have SubscriptionPlan.trial instantiate ProductDetail using const

[2shrestha22]

The thing is I can not modify ProductDetail class. It is from some other package. What will be a good solution for this case?

[rrousselGit]

You'd have to manually implement the == on SubscriptionPlan then

[2shrestha22]

Thank you I will do as you said.