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

using System.Net;
using Big.Infrastructure;

namespace Big.Tests;

public class AclHttpClientTests
{
    private static AclHttpClient Client(StubHandler handler) => new(
        new HttpClient(handler), new AclOptions { BaseUrl = new("http://acl/") });

    [Fact]
    public async Task Opens_a_zaak_by_posting_the_bsn_and_returns_the_zaak_url()
    {
        var capture = new RequestCapture();
        var client = Client(capture.Responds(HttpStatusCode.OK,
            """{"zaakUrl":"http://openzaak/zaken/api/v1/zaken/abc"}"""));

        var url = await client.OpenZaakAsync("123456782", "reg-42");

        Assert.Equal("http://openzaak/zaken/api/v1/zaken/abc", url.ToString());
        Assert.Equal(HttpMethod.Post, capture.Seen!.Method);
        Assert.Equal("http://acl/zaken", capture.Seen.RequestUri!.ToString());
        Assert.Contains("\"bsn\":\"123456782\"", capture.Body);
        Assert.Contains("\"reference\":\"reg-42\"", capture.Body);
    }

    [Fact]
    public async Task Throws_when_the_acl_rejects_the_request()
    {
        var capture = new RequestCapture();
        var client = Client(capture.Responds(HttpStatusCode.BadGateway));

        await Assert.ThrowsAsync<HttpRequestException>(() => client.OpenZaakAsync("123456782", "reg-1"));
    }

    [Fact]
    public async Task Throws_when_the_acl_returns_an_empty_body()
    {
        var capture = new RequestCapture();
        var client = Client(capture.Responds(HttpStatusCode.OK, "null"));

        var ex = await Assert.ThrowsAsync<InvalidOperationException>(() => client.OpenZaakAsync("123456782", "reg-1"));
        Assert.Contains("empty", ex.Message, StringComparison.OrdinalIgnoreCase);
    }

    [Fact]
    public async Task Approves_a_zaak_by_posting_its_url_to_statussen()
    {
        var capture = new RequestCapture();
        var client = Client(capture.Responds(HttpStatusCode.NoContent));

        await client.ApproveZaakAsync(new Uri("http://openzaak/zaken/api/v1/zaken/abc"));

        Assert.Equal(HttpMethod.Post, capture.Seen!.Method);
        Assert.Equal("http://acl/statussen", capture.Seen.RequestUri!.ToString());
        Assert.Contains("\"zaakUrl\":\"http://openzaak/zaken/api/v1/zaken/abc\"", capture.Body);
    }

    [Fact]
    public async Task Approve_throws_when_the_acl_rejects_the_request()
    {
        var capture = new RequestCapture();
        var client = Client(capture.Responds(HttpStatusCode.BadGateway));

        await Assert.ThrowsAsync<HttpRequestException>(
            () => client.ApproveZaakAsync(new Uri("http://openzaak/zaken/api/v1/zaken/abc")));
    }

    [Fact]
    public async Task Approve_rejects_a_null_zaak_url_without_sending_a_request()
    {
        var capture = new RequestCapture();
        var client = Client(capture.Responds(HttpStatusCode.NoContent));

        await Assert.ThrowsAsync<ArgumentNullException>(() => client.ApproveZaakAsync(null!));
        Assert.Null(capture.Seen);
    }
}