fix: Added null checks and configuration validation

src/Liquid.Messaging.ServiceBus/Liquid.Messaging.ServiceBus.csproj

@@ -10,7 +10,7 @@
     <Copyright>Avanade 2019</Copyright>
     <PackageProjectUrl>https://github.com/Avanade/Liquid-Application-Framework</PackageProjectUrl>
     <PackageIcon>logo.png</PackageIcon>
-    <Version>8.0.0</Version>
+    <Version>8.0.1</Version>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <Description>
       The Liquid.Messaging.ServiceBus provides producer and consumer patterns to allow the send and consumption of Messaging inside your microservice.

src/Liquid.Messaging.ServiceBus/ServiceBusConsumer.cs

@@ -14,7 +14,7 @@
     ///<inheritdoc/>
     public class ServiceBusConsumer<TEntity> : ILiquidConsumer<TEntity>
     {
         private ServiceBusProcessor _messageProcessor;
 
         private readonly IServiceBusFactory _factory;
 
@@ -34,7 +34,7 @@
         public ServiceBusConsumer(IServiceBusFactory factory, string settingsName)
         {
             _factory = factory ?? throw new ArgumentNullException(nameof(factory));
-            _settingsName = settingsName;
+            _settingsName = settingsName ?? throw new ArgumentNullException(nameof(settingsName));
         }
 
         ///<inheritdoc/>

src/Liquid.Messaging.ServiceBus/ServiceBusFactory.cs

@@ -22,12 +22,17 @@
         }
 
         ///<inheritdoc/>
         public ServiceBusProcessor GetProcessor(string settingsName)
         {
             try
             {
                 var config = _options.Settings.FirstOrDefault(x => x.EntityPath == settingsName);
 
+                if (config == null)
+                {
+                    throw new ArgumentOutOfRangeException(nameof(settingsName), $"The settings name '{settingsName}' is not found in the configuration.");
+                }
+
                 var options = new ServiceBusProcessorOptions();
 
                 options.ReceiveMode = config.PeekLockMode ? ServiceBusReceiveMode.PeekLock : ServiceBusReceiveMode.ReceiveAndDelete;
@@ -42,7 +47,7 @@
                     processor = serviceBusClient.CreateProcessor(config.EntityPath, options);
                 }
                 else
-                {                    
+                {
                     processor = serviceBusClient.CreateProcessor(config.EntityPath, config.Subscription, options);
                 }
 
@@ -55,10 +60,15 @@
         }
 
         ///<inheritdoc/>
         public ServiceBusSender GetSender(string settingsName)
         {
             var config = _options.Settings.FirstOrDefault(x => x.EntityPath == settingsName);
 
+            if (config == null)
+            {
+                throw new ArgumentOutOfRangeException(nameof(settingsName), $"The settings name '{settingsName}' is not found in the configuration.");
+            }
+
             try
             {
                 var serviceBusClient = new ServiceBusClient(config.ConnectionString);
@@ -73,19 +83,24 @@
         }
 
         ///<inheritdoc/>
         public ServiceBusReceiver GetReceiver(string settingsName)
         {
             var config = _options.Settings.FirstOrDefault(x => x.EntityPath == settingsName);
 
+            if (config == null)
+            {
+                throw new ArgumentOutOfRangeException(nameof(settingsName), $"The settings name '{settingsName}' is not found in the configuration.");
+            }
+
             try
             {
                 var options = new ServiceBusReceiverOptions();
 
                 options.ReceiveMode = config.PeekLockMode ? ServiceBusReceiveMode.PeekLock : ServiceBusReceiveMode.ReceiveAndDelete;
-                
-                var serviceBusClient = new ServiceBusClient(config.ConnectionString);                
-                
-                var receiver = serviceBusClient.CreateReceiver(config.EntityPath, options);                
+
+                var serviceBusClient = new ServiceBusClient(config.ConnectionString);
+
+                var receiver = serviceBusClient.CreateReceiver(config.EntityPath, options);
 
                 return receiver;
             }

test/Liquid.Messaging.ServiceBus.Tests/ServiceBusConsumerTest.cs

@@ -25,16 +25,16 @@ public ServiceBusConsumerTest() : base(_factory, "test")
         }
 
         [Fact]
-        public void RegisterMessageHandler_WhenRegisteredSucessfully_StartProcessingReceivedCall()
+        public async Task RegisterMessageHandler_WhenRegisteredSucessfully_StartProcessingReceivedCall()
         {
             var messageReceiver = Substitute.For<ServiceBusProcessor>();
             _factory.GetProcessor(Arg.Any<string>()).Returns(messageReceiver);
 
             ConsumeMessageAsync += ProcessMessageAsyncMock;
 
-            RegisterMessageHandler();
+            await RegisterMessageHandler();
 
-            messageReceiver.Received(1).StartProcessingAsync();
+            await messageReceiver.Received(1).StartProcessingAsync();
         }
 
         [Fact]
@@ -46,7 +46,6 @@ public async Task RegisterMessageHandler_WhenConsumeMessageAssyncIsNull_ThrowNot
             await Assert.ThrowsAsync<NotImplementedException>(() => RegisterMessageHandler());
         }
 
-
         [Fact]
         public async Task MessageHandler_WhenProcessExecutedSucessfully()
         {
@@ -85,6 +84,17 @@ public async Task ErrorHandler_WhenProcessErrorExecuted_ThrowsMessagingConsumerE
             await Assert.ThrowsAsync<MessagingConsumerException>(() => ErrorHandler(processError));
         }
 
+        [Fact]
+        public void Constructor_WhenFactoryIsNull_ThrowsArgumentNullException()
+        {
+           Assert.Throws<ArgumentNullException>(() => new ServiceBusConsumer<EntityMock>(null, "test"));
+        }
+
+        [Fact]
+        public void Constructor_WhenSettingsNameIsNull_ThrowsArgumentNullException()
+        {
+            Assert.Throws<ArgumentNullException>(() => new ServiceBusConsumer<EntityMock>(_factory, null));
+        }
 
 #pragma warning disable CS1998 // Async method lacks 'await' operators and will run synchronously
         private async Task ProcessMessageAsyncMock(ConsumerMessageEventArgs<EntityMock> args, CancellationToken cancellationToken)

test/Liquid.Messaging.ServiceBus.Tests/ServiceBusFactoryTests.cs

@@ -0,0 +1,136 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Azure.Messaging.ServiceBus;
+using Liquid.Core.Exceptions;
+using Liquid.Messaging.ServiceBus;
+using Liquid.Messaging.ServiceBus.Settings;
+using Microsoft.Extensions.Options;
+using NSubstitute;
+using Xunit;
+
+namespace Liquid.Messaging.ServiceBus.Tests
+{
+    public class ServiceBusFactoryTests
+    {
+        private readonly ServiceBusSettings _settings;
+        private readonly IOptions<ServiceBusSettings> _options;
+
+        public ServiceBusFactoryTests()
+        {
+            _settings = new ServiceBusSettings
+            {
+                Settings = new List<ServiceBusEntitySettings>
+                {
+                    new ServiceBusEntitySettings
+                    {
+                        EntityPath = "queue1",
+                        ConnectionString = "Endpoint=sb://test.servicebus.windows.net/;SharedAccessKeyName=RootManageSharedAccessKey;SharedAccessKey=key",
+                        PeekLockMode = true,
+                        MaxConcurrentCalls = 5,
+                        Subscription = null
+                    },
+                    new ServiceBusEntitySettings
+                    {
+                        EntityPath = "topic1",
+                        ConnectionString = "Endpoint=sb://test.servicebus.windows.net/;SharedAccessKeyName=RootManageSharedAccessKey;SharedAccessKey=key",
+                        PeekLockMode = false,
+                        MaxConcurrentCalls = 2,
+                        Subscription = "sub1"
+                    }
+                }
+            };
+            _options = Substitute.For<IOptions<ServiceBusSettings>>();
+            _options.Value.Returns(_settings);
+        }
+
+        [Fact]
+        public void GetSender_ReturnsSender_WhenConfigExists()
+        {
+            // Arrange
+            var factory = new ServiceBusFactory(_options);
+
+            // Act
+            var sender = factory.GetSender("queue1");
+
+            // Assert
+            Assert.NotNull(sender);
+            Assert.IsType<ServiceBusSender>(sender);
+        }
+
+        [Fact]
+        public void GetSender_ThrowsArgumentOutOfRangeException_WhenConfigMissing()
+        {
+            // Arrange
+            var factory = new ServiceBusFactory(_options);
+
+            // Act & Assert
+            var ex = Assert.Throws<ArgumentOutOfRangeException>(() => factory.GetSender("notfound"));
+            Assert.Contains("notfound", ex.Message);
+        }
+
+        [Fact]
+        public void GetProcessor_ReturnsProcessor_WhenQueueConfigExists()
+        {
+            // Arrange
+            var factory = new ServiceBusFactory(_options);
+
+            // Act
+            var processor = factory.GetProcessor("queue1");
+
+            // Assert
+            Assert.NotNull(processor);
+            Assert.IsType<ServiceBusProcessor>(processor);
+        }
+
+        [Fact]
+        public void GetProcessor_ReturnsProcessor_WhenTopicConfigExists()
+        {
+            // Arrange
+            var factory = new ServiceBusFactory(_options);
+
+            // Act
+            var processor = factory.GetProcessor("topic1");
+
+            // Assert
+            Assert.NotNull(processor);
+            Assert.IsType<ServiceBusProcessor>(processor);
+        }
+
+        [Fact]
+        public void GetProcessor_ThrowsMessagingMissingConfigurationException_WhenConfigMissing()
+        {
+            // Arrange
+            var factory = new ServiceBusFactory(_options);
+
+            // Act & Assert
+            var ex = Assert.Throws<MessagingMissingConfigurationException>(() => factory.GetProcessor("notfound"));
+            Assert.Contains("notfound", ex.Message);
+        }
+
+        [Fact]
+        public void GetReceiver_ReturnsReceiver_WhenConfigExists()
+        {
+            // Arrange
+            var factory = new ServiceBusFactory(_options);
+
+            // Act
+            var receiver = factory.GetReceiver("queue1");
+
+            // Assert
+            Assert.NotNull(receiver);
+            Assert.IsType<ServiceBusReceiver>(receiver);
+        }
+
+        [Fact]
+        public void GetReceiver_ThrowsArgumentOutOfRangeException_WhenConfigMissing()
+        {
+            // Arrange
+            var factory = new ServiceBusFactory(_options);
+
+            // Act & Assert
+            var ex = Assert.Throws<ArgumentOutOfRangeException>(() => factory.GetReceiver("notfound"));
+            Assert.Contains("notfound", ex.Message);
+        }
+    }
+}