Test using the Microsoft Web Application Factory

MassTransit’s test harness can be used with Microsoft’s Web Application Factory, allowing unit and/or integration testing of ASP.NET applications.

:sample{sample="web-application-factory"}

To configure MassTransit’s test harness for use with the Web Application Factory, call AddMassTransitTestHarness in the set up as shown below.

await using var application = new WebApplicationFactory<Program>()
    .WithWebHostBuilder(builder =>
        builder.ConfigureServices(services =>
            services.AddMassTransitTestHarness()));

var testHarness = application.Services.GetTestHarness();

using var client = application.CreateClient();

var orderId = NewId.NextGuid();

var submitOrderResponse = await client.PostAsync("/Order", JsonContent.Create(new Order
{
    OrderId = orderId
}));

var consumerTestHarness = testHarness.GetConsumerHarness<SubmitOrderConsumer>();

Assert.That(await consumerTestHarness.Consumed.Any<SubmitOrder>(x => x.Context.Message.OrderId == orderId), Is.True);