hrynco-notification-service/HrynCo.NotificationService.Services.Tests/EmailProcessing/SendEmailDeliveryValidatorTests.cs

namespace HrynCo.NotificationService.Services.Tests.EmailProcessing;

using HrynCo.NotificationService.Contracts.Messages;
using HrynCo.NotificationService.Worker;
using Hrynco.RabbitMq;

public sealed class SendEmailDeliveryValidatorTests
{
    [Fact]
    public void ValidItemTrackerDelivery_IsAccepted()
    {
        string? error = SendEmailDeliveryValidator.GetValidationError(
            CreateMessage(),
            CreateContext(),
            SendEmailConsumer.SupportedMessageType);

        Assert.Null(error);
    }

    [Fact]
    public void MissingMessageId_IsRejected()
    {
        RabbitMqMessageContext context = CreateContext() with { MessageId = null };

        string? error = SendEmailDeliveryValidator.GetValidationError(
            CreateMessage(),
            context,
            SendEmailConsumer.SupportedMessageType);

        Assert.Equal("AMQP MessageId is required.", error);
    }

    [Fact]
    public void UnsupportedContractVersion_IsRejected()
    {
        RabbitMqMessageContext context = CreateContext() with
        {
            MessageType = "Notification.SendEmail.v2"
        };

        string? error = SendEmailDeliveryValidator.GetValidationError(
            CreateMessage(),
            context,
            SendEmailConsumer.SupportedMessageType);

        Assert.Equal("Unsupported AMQP message type 'Notification.SendEmail.v2'.", error);
    }

    private static RabbitMqMessageContext CreateContext() => new()
    {
        QueueName = SendEmailConsumer.IncomingQueue,
        Exchange = string.Empty,
        RoutingKey = SendEmailConsumer.IncomingQueue,
        MessageId = Guid.NewGuid().ToString("D"),
        MessageType = SendEmailConsumer.SupportedMessageType,
        CorrelationId = "correlation-id",
        ContentType = "application/json"
    };

    private static SendEmailMessage CreateMessage() => new()
    {
        CorrelationContext = new CorrelationContext
        {
            CorrelationId = "correlation-id",
            ReplyTo = "item-tracker.notifications.result"
        },
        Data = new SendEmailMessageData
        {
            ServiceName = "StoreMate-Prod",
            TemplateKey = "EmailVerification",
            RecipientEmail = "owner@example.com",
            RecipientName = "Owner",
            LanguageCode = "uk",
            Variables = new Dictionary<string, string> { ["AppName"] = "StoreMate" }
        }
    };
}