Mock data

Generate sample input and choose between legacy mocking and bounded seeded generation.

Mocking schemas

Use mock() for best-effort sample data. It does not guarantee that the generated value passes validation. For bounded generation that validates every returned value, use seeded mocking.

final userSchema = object({
  'name': string().min(3),
  'age': number().positive(),
  'email': string().email(),
});
final mockUser = userSchema.mock();

print(mockUser);
// => { name: 'Acanthis', age: 32, email: 'test@example.com' }

Seeded test data

Use mockSeeded for bounded, reproducible generation with a documented supported subset and a validation guarantee.

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Browse all schemas · Understand validation results