register-referentie/services/domain/Big.Tests/SubmitRegistrationTests.cs

using Big.Application;
using Big.Domain;

namespace Big.Tests;

public class SubmitRegistrationTests
{
    [Fact]
    public async Task Submitting_persists_an_ingediend_registration_and_starts_the_process()
    {
        var store = new FakeRegistrationStore();
        var workflow = new FakeWorkflowClient(processInstanceId: "proc-42");
        var handler = new SubmitRegistration(store, workflow);

        var id = await handler.HandleAsync(new SubmitRegistrationCommand("123456782"));

        var saved = await store.GetAsync(id);
        Assert.NotNull(saved);
        Assert.Equal("123456782", saved.Bsn);
        Assert.Equal(RegistrationStatus.Ingediend, saved.Status);
        Assert.Equal("proc-42", saved.ProcessInstanceId);
        Assert.Equal(id, workflow.StartedFor);
        Assert.Null(saved.ZaakUrl);
        // Persisted twice: once before starting the process, once after recording the instance id.
        Assert.Equal(2, store.SaveCount);
    }

    [Fact]
    public async Task Submitting_a_foreign_diploma_carries_its_origin_to_the_process()
    {
        var store = new FakeRegistrationStore();
        var workflow = new FakeWorkflowClient();
        var handler = new SubmitRegistration(store, workflow);

        var id = await handler.HandleAsync(new SubmitRegistrationCommand("123456782", DiplomaOrigin.Buitenlands));

        Assert.Equal(DiplomaOrigin.Buitenlands, (await store.GetAsync(id))!.DiplomaOrigin);
        Assert.Equal(DiplomaOrigin.Buitenlands, workflow.StartedWithOrigin);
    }

    [Fact]
    public async Task Rejects_a_null_command_without_touching_the_store_or_workflow()
    {
        var store = new FakeRegistrationStore();
        var workflow = new FakeWorkflowClient();
        var handler = new SubmitRegistration(store, workflow);

        await Assert.ThrowsAsync<ArgumentNullException>(() => handler.HandleAsync(null!));
        Assert.Equal(0, store.SaveCount);
        Assert.Null(workflow.StartedFor);
    }

    [Fact]
    public async Task Submitting_persists_the_registration_before_starting_the_process()
    {
        // The worker correlates the OpenZaakAanmaken job back to the aggregate by id, so the
        // aggregate must already be persisted when the process starts (ADR-0009).
        var store = new FakeRegistrationStore();
        Registration? visibleAtStart = null;
        var workflow = new FakeWorkflowClient(onStart: id => visibleAtStart = store.GetAsync(id).Result);
        var handler = new SubmitRegistration(store, workflow);

        await handler.HandleAsync(new SubmitRegistrationCommand("123456782"));

        Assert.NotNull(visibleAtStart);
    }

    [Fact]
    public async Task Submitting_without_a_bsn_is_rejected_and_starts_no_process()
    {
        var store = new FakeRegistrationStore();
        var workflow = new FakeWorkflowClient();
        var handler = new SubmitRegistration(store, workflow);

        await Assert.ThrowsAnyAsync<ArgumentException>(
            () => handler.HandleAsync(new SubmitRegistrationCommand("")));
        Assert.Null(workflow.StartedFor);
    }
}