Add RabbitMQ integration tests and URL parsing logic

Enhanced test coverage for RabbitMQ integration by adding:
- New package references for dependency injection, logging, and RabbitMQ.
- `EmailSenderCollection` and `EmailSenderFixture` for managing static client lifecycle in integration tests.
- Integration tests for `EmailSender` and `OutgoingEmailPublisher` to verify connection management, message publishing, and serialization.
- `EmailSenderUrlOverloadTests` to validate URL-based connection overload behavior.
- `RabbitMqTestConfig` for centralized RabbitMQ test configuration.
- Unit tests for URL parsing logic in `EmailSenderUrlParsingTests`.

These changes improve reliability, maintainability, and test coverage for the messaging service.
This commit is contained in:
2026-07-29 11:02:21 +02:00
parent 5d9197f54a
commit 220d3f441f
6 changed files with 556 additions and 0 deletions

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using DigitalData.MessagingService.Client.DependencyInjection;
using DigitalData.MessagingService.Publisher.Abstraction;
namespace DigitalData.MessagingService.Tests.Integration;
/// <summary>
/// xUnit collection that serializes all <see cref="EmailSenderTests"/> so they share
/// the same process-wide static state of <see cref="EmailSender.LazyProvider"/>.
/// </summary>
[CollectionDefinition(Name)]
public sealed class EmailSenderCollection : ICollectionFixture<EmailSenderFixture>
{
public const string Name = "EmailSender";
}
/// <summary>
/// Fixture that connects <see cref="EmailSender"/> once before all tests in the collection run.
/// </summary>
public sealed class EmailSenderFixture
{
public EmailSenderFixture()
{
// EmailSender is a static class with a Lazy<IServiceProvider>.
// ConnectRabbitMq can only be called successfully once per process.
if (!EmailSender.IsConnected)
{
EmailSender.ConnectRabbitMq(cfg =>
{
cfg.HostName = RabbitMqTestConfig.HostName;
cfg.Port = RabbitMqTestConfig.Port;
cfg.UserName = RabbitMqTestConfig.UserName;
cfg.Password = RabbitMqTestConfig.Password;
cfg.VirtualHost = RabbitMqTestConfig.VirtualHost;
cfg.QueueName = RabbitMqTestConfig.QueueName;
cfg.ExchangeName = RabbitMqTestConfig.ExchangeName;
cfg.RoutingKey = RabbitMqTestConfig.RoutingKey;
cfg.DlqQueueName = RabbitMqTestConfig.DlqQueueName;
cfg.DlqExchangeName = RabbitMqTestConfig.DlqExchangeName;
cfg.DlqRoutingKey = RabbitMqTestConfig.DlqRoutingKey;
});
}
}
}
/// <summary>
/// Integration tests for the <see cref="EmailSender"/> static client.
/// All tests run inside <see cref="EmailSenderCollection"/> to share the single
/// static connection established by <see cref="EmailSenderFixture"/>.
/// </summary>
[Collection(EmailSenderCollection.Name)]
public sealed class EmailSenderTests
{
[Fact]
public void IsConnected_AfterConnectRabbitMq_ReturnsTrue()
{
Assert.True(EmailSender.IsConnected);
}
[Fact]
public void ConnectRabbitMq_WhenAlreadyConnected_WithThrowException_ThrowsInvalidOperationException()
{
Assert.Throws<InvalidOperationException>(() =>
EmailSender.ConnectRabbitMq(cfg => { }, OnReconnect.ThrowException));
}
[Fact]
public void ConnectRabbitMq_WhenAlreadyConnected_WithIgnore_DoesNotThrow()
{
var exception = Record.Exception(() =>
EmailSender.ConnectRabbitMq(cfg => { }, OnReconnect.Ignore));
Assert.Null(exception);
}
[Fact]
public void Send_WithValidEmail_DoesNotThrow()
{
var email = new OutgoingEmailEvent
{
Id = Guid.NewGuid(),
Recipient = "hakanttek@gmail.com",
Subject = "EmailSender.Send Integration Test",
Body = "<p>Sent via EmailSender static client.</p>",
IsHtml = true,
QueuedAt = DateTime.Now
};
var exception = Record.Exception(() => EmailSender.Send(email));
Assert.Null(exception);
}
[Fact]
public void Send_WithPlainTextBody_DoesNotThrow()
{
var email = new OutgoingEmailEvent
{
Id = Guid.NewGuid(),
Recipient = "hakanttek@gmail.com",
Subject = "Plain Text Test",
Body = "This is a plain text email.",
IsHtml = false,
QueuedAt = DateTime.Now
};
var exception = Record.Exception(() => EmailSender.Send(email));
Assert.Null(exception);
}
}

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using DigitalData.MessagingService.Client.DependencyInjection;
using DigitalData.MessagingService.Publisher.Abstraction;
namespace DigitalData.MessagingService.Tests.Integration;
/// <summary>
/// Integration tests for the URL-based <see cref="EmailSender.ConnectRabbitMq(string, string, string, OnReconnect)"/>
/// overload. All tests run inside <see cref="EmailSenderCollection"/> so they share the already-established
/// static connection. The URL overload is exercised via <see cref="OnReconnect.Ignore"/> and
/// <see cref="OnReconnect.ThrowException"/> to verify its delegation and guard behavior.
/// </summary>
[Collection(EmailSenderCollection.Name)]
public sealed class EmailSenderUrlOverloadTests
{
private static readonly string ValidUrl = $"amqp://{RabbitMqTestConfig.HostName}:{RabbitMqTestConfig.Port}";
private static readonly string ValidUrlWithVHost = $"amqp://{RabbitMqTestConfig.HostName}:{RabbitMqTestConfig.Port}/myvhost";
[Fact]
public void ConnectRabbitMq_UrlOverload_WhenAlreadyConnected_WithIgnore_DoesNotThrow()
{
var exception = Record.Exception(() =>
EmailSender.ConnectRabbitMq(
ValidUrl,
RabbitMqTestConfig.UserName,
RabbitMqTestConfig.Password,
OnReconnect.Ignore));
Assert.Null(exception);
}
[Fact]
public void ConnectRabbitMq_UrlOverload_WhenAlreadyConnected_WithThrowException_Throws()
{
Assert.Throws<InvalidOperationException>(() =>
EmailSender.ConnectRabbitMq(
ValidUrl,
RabbitMqTestConfig.UserName,
RabbitMqTestConfig.Password,
OnReconnect.ThrowException));
}
[Fact]
public void ConnectRabbitMq_UrlOverload_WithVHostInPath_WithIgnore_DoesNotThrow()
{
var exception = Record.Exception(() =>
EmailSender.ConnectRabbitMq(
ValidUrlWithVHost,
RabbitMqTestConfig.UserName,
RabbitMqTestConfig.Password,
OnReconnect.Ignore));
Assert.Null(exception);
}
[Fact]
public void Send_AfterUrlOverloadConnection_DoesNotThrow()
{
var email = new OutgoingEmailEvent
{
Id = Guid.NewGuid(),
Recipient = "url-overload-test@example.com",
Subject = "URL Overload Integration Test",
Body = "<p>Sent after URL-based connection.</p>",
IsHtml = true,
QueuedAt = DateTime.Now
};
// Connection was established via Action<> overload in the fixture;
// Send should work regardless of which overload was used to connect.
var exception = Record.Exception(() => EmailSender.Send(email));
Assert.Null(exception);
}
}

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using System.Text;
using System.Text.Json;
using DigitalData.MessagingService.Publisher;
using DigitalData.MessagingService.Publisher.Abstraction;
using DigitalData.MessagingService.RabbitMQ;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using RabbitMQ.Client;
namespace DigitalData.MessagingService.Tests.Integration;
/// <summary>
/// Integration tests for <see cref="OutgoingEmailPublisher"/> against the real RabbitMQ broker.
/// Each test publishes a message and immediately reads it back via BasicGetAsync to verify
/// the full round-trip without starting the consumer (which requires Limilabs Mail.dll).
/// </summary>
public sealed class OutgoingEmailPublisherTests : IAsyncDisposable
{
private readonly ServiceProvider _serviceProvider;
private readonly IOutgoingEmailPublisher _publisher;
private readonly RabbitMqConnectionFactory _factory;
public OutgoingEmailPublisherTests()
{
var services = new ServiceCollection();
services.AddLogging();
services.AddMessagingServicePublisher(RabbitMqTestConfig.Apply);
_serviceProvider = services.BuildServiceProvider();
_publisher = _serviceProvider.GetRequiredService<IOutgoingEmailPublisher>();
_factory = _serviceProvider.GetRequiredService<RabbitMqConnectionFactory>();
}
[Fact]
public async Task EnqueueAsync_PublishesMessage_MessageArrivesInQueue()
{
var email = new OutgoingEmailEvent
{
Id = Guid.NewGuid(),
Recipient = "test@example.com",
Subject = "Integration Test - EnqueueAsync",
Body = "<p>Hello from integration test.</p>",
IsHtml = true,
QueuedAt = DateTime.Now
};
var depthBefore = await _publisher.GetQueueDepthAsync();
await _publisher.EnqueueAsync(email);
await Task.Delay(300);
var depthAfter = await _publisher.GetQueueDepthAsync();
Assert.True(depthAfter >= depthBefore + 1,
$"Expected queue depth to increase by at least 1. Before: {depthBefore}, After: {depthAfter}.");
}
[Fact]
public async Task EnqueueAsync_MultipleMessages_AllArrivesInQueue()
{
var emails = Enumerable.Range(1, 3).Select(i => new OutgoingEmailEvent
{
Id = Guid.NewGuid(),
Recipient = $"recipient{i}@example.com",
Subject = $"Integration Test - Batch #{i}",
Body = $"Batch message {i}",
IsHtml = false,
QueuedAt = DateTime.Now
}).ToList();
foreach (var email in emails)
await _publisher.EnqueueAsync(email);
await Task.Delay(500);
// Verify at least one message is present
var received = await PeekMessageAsync();
Assert.NotNull(received);
}
[Fact]
public async Task GetQueueDepthAsync_AfterPublish_ReturnsPositiveDepth()
{
var email = new OutgoingEmailEvent
{
Id = Guid.NewGuid(),
Recipient = "depth-test@example.com",
Subject = "Integration Test - GetQueueDepth",
Body = "Queue depth test",
IsHtml = false,
QueuedAt = DateTime.Now
};
await _publisher.EnqueueAsync(email);
await Task.Delay(300);
var depth = await _publisher.GetQueueDepthAsync();
Assert.True(depth > 0, $"Expected queue depth > 0, but got {depth}.");
}
[Fact]
public async Task EnqueueAsync_SerializesAllFields_DeserializesCorrectly()
{
var id = Guid.NewGuid();
var email = new OutgoingEmailEvent
{
Id = id,
Recipient = "serialize@example.com",
Subject = "Serialization Test",
Body = "<strong>Bold</strong>",
IsHtml = true,
QueuedAt = DateTime.Now
};
await _publisher.EnqueueAsync(email);
await Task.Delay(300);
// Read messages until we find the one we just published
var received = await FindMessageAsync(id);
Assert.NotNull(received);
Assert.Equal(id, received.Id);
Assert.Equal("serialize@example.com", received.Recipient);
Assert.Equal("Serialization Test", received.Subject);
Assert.Equal("<strong>Bold</strong>", received.Body);
Assert.True(received.IsHtml);
}
/// <summary>
/// Reads a single message from the queue without acknowledging it (peek via nack+requeue).
/// </summary>
private async Task<OutgoingEmailEvent?> PeekMessageAsync()
{
var connection = await _factory.GetDefaultConnectionAsync();
await using var channel = await connection.CreateChannelAsync();
var result = await channel.BasicGetAsync(RabbitMqTestConfig.QueueName, autoAck: false);
if (result is null)
return null;
// Nack with requeue=true so the message stays in the queue for consumer
await channel.BasicNackAsync(result.DeliveryTag, multiple: false, requeue: true);
var json = Encoding.UTF8.GetString(result.Body.ToArray());
return JsonSerializer.Deserialize<OutgoingEmailEvent>(json);
}
/// <summary>
/// Scans queue messages (up to a limit) to find a message matching the given <paramref name="id"/>.
/// All messages are re-queued after inspection.
/// </summary>
private async Task<OutgoingEmailEvent?> FindMessageAsync(Guid id, int maxMessages = 50)
{
var connection = await _factory.GetDefaultConnectionAsync();
await using var channel = await connection.CreateChannelAsync();
var requeue = new List<(ulong DeliveryTag, byte[] Body)>();
OutgoingEmailEvent? found = null;
for (int i = 0; i < maxMessages; i++)
{
var result = await channel.BasicGetAsync(RabbitMqTestConfig.QueueName, autoAck: false);
if (result is null)
break;
requeue.Add((result.DeliveryTag, result.Body.ToArray()));
var json = Encoding.UTF8.GetString(result.Body.ToArray());
var evt = JsonSerializer.Deserialize<OutgoingEmailEvent>(json);
if (evt?.Id == id)
{
found = evt;
break;
}
}
// Re-queue all inspected messages so the consumer can still process them
foreach (var (tag, _) in requeue)
await channel.BasicNackAsync(tag, multiple: false, requeue: true);
return found;
}
public async ValueTask DisposeAsync()
{
await _factory.DisposeAsync();
await _serviceProvider.DisposeAsync();
}
}