explicit-mapping/tests/BeforeAfter.Tests/TestData/ClientBuilder.cs

using After;

namespace BeforeAfter.Tests.TestData;

/// <summary>
/// Test data builder for a <see cref="Client"/> with its orders
/// (TestDataBuilder pattern). <see cref="ValidClient"/> starts from a
/// <em>fresh</em> client, exactly what <c>new Client()</c> gives.
/// </summary>
public sealed class ClientBuilder
{
    private readonly Client _client = new();

    /// <summary>A valid, fresh client — the neutral starting point for tests.</summary>
    public static ClientBuilder ValidClient() => new();

    public ClientBuilder WithId(Guid id)
    {
        _client.Id = id;
        return this;
    }

    public ClientBuilder WithName(string name)
    {
        _client.Name = name;
        return this;
    }

    /// <summary>Adds an order to the client (navigation fix-up wires the back-reference).</summary>
    public ClientBuilder WithOrder(Order order)
    {
        _client.Orders.Add(order);
        return this;
    }

    /// <summary>Builds the given builder and adds its order — chaining sugar for <c>.WithOrder(builder.Build())</c>.</summary>
    public ClientBuilder WithOrder(OrderBuilder order) => WithOrder(order.Build());

    public Client Build() => _client;
}