Creating C# test data without repetition: Test Data Builder, Object Mother, AutoFixture, Bogus

// ======================================================================
// Q: How do you create test data without repetition?
//
// - Test Data Builder (Q27): valid defaults, and you change only what matters to
//   the test. The test shows what counts.
// - Object Mother: ready-made, named objects (TestOrders.PlacedWithTwoLines()).
// - AutoFixture (random values for whatever doesn't matter), Bogus (realistic
//   names and addresses for demo / seed data).
// ======================================================================

var order = new OrderBuilder()
    .ForCustomer(1)
    .WithLine("PIP-100", quantity: 2)
    .Placed()
    .Build();                // everything else: valid defaults