Add TryAddDefaultAWSOptions methods and unit tests

Introduce TryAddDefaultAWSOptions methods to ServiceCollectionExtensions for adding AWSOptions without overriding existing registrations. Add unit tests to verify the new methods' behavior. Enhance dependency injection setup for AWS services with added flexibility and robustness.

extensions/src/AWSSDK.Extensions.NETCore.Setup/ServiceCollectionExtensions.cs

@@ -63,6 +63,38 @@ public static IServiceCollection AddDefaultAWSOptions(
             return collection;
         }
 
+        /// <summary>
+        /// Adds the AWSOptions object to the dependency injection framework providing information
+        /// that will be used to construct Amazon service clients if they haven't already been registered.
+        /// </summary>
+        /// <param name="collection"></param>
+        /// <param name="options">The default AWS options used to construct AWS service clients with.</param>
+        /// <returns>Returns back the IServiceCollection to continue the fluent system of IServiceCollection.</returns>
+        public static IServiceCollection TryAddDefaultAWSOptions(this IServiceCollection collection, AWSOptions options)
+        {
+            collection.TryAdd(new ServiceDescriptor(typeof(AWSOptions), options));
+            return collection;
+        }
+
+        /// <summary>
+        /// Adds the AWSOptions object to the dependency injection framework providing information
+        /// that will be used to construct Amazon service clients if they haven't already been registered.
+        /// </summary>
+        /// <param name="collection"></param>
+        /// <param name="implementationFactory">The factory that creates the default AWS options.
+        /// The AWS options will be used to construct AWS service clients
+        /// </param>
+        /// <param name="lifetime">The lifetime of the AWSOptions. The default is Singleton.</param>
+        /// <returns>Returns back the IServiceCollection to continue the fluent system of IServiceCollection.</returns>
+        public static IServiceCollection TryAddDefaultAWSOptions(
+            this IServiceCollection collection, 
+            Func<IServiceProvider, AWSOptions> implementationFactory, 
+            ServiceLifetime lifetime = ServiceLifetime.Singleton)
+        {
+            collection.TryAdd(new ServiceDescriptor(typeof(AWSOptions), implementationFactory, lifetime));
+            return collection;
+        }
+
         /// <summary>
         /// Adds the Amazon service client to the dependency injection framework. The Amazon service client is not
         /// created until it is requested. If the ServiceLifetime property is set to Singleton, the default, then the same

extensions/test/NETCore.SetupTests/DependencyInjectionTests.cs

@@ -13,6 +13,48 @@ namespace DependencyInjectionTests
 {
     public class DependencyInjectionTests
     {
+        [Fact]
+        public void TryAddDefaultConfigDontOverrideWhenAlreadySetup()
+        {
+            var builder = new ConfigurationBuilder();
+            builder.AddJsonFile("./TestFiles/GetClientConfigSettingsTest.json");
+
+            IConfiguration config = builder.Build();
+
+            ServiceCollection services = new ServiceCollection();
+
+            var mockOptions = Mock.Of<AWSOptions>();
+
+            services.AddDefaultAWSOptions(mockOptions);
+            services.TryAddDefaultAWSOptions(config.GetAWSOptions());
+
+            var serviceProvider = services.BuildServiceProvider();
+
+            var options = serviceProvider.GetService<AWSOptions>();
+            Assert.True(object.ReferenceEquals(options, mockOptions));
+        }
+
+        [Fact]
+        public void TryAddDefaultConfigWithFunctionDontOverrideWhenAlreadySetup()
+        {
+            var builder = new ConfigurationBuilder();
+            builder.AddJsonFile("./TestFiles/GetClientConfigSettingsTest.json");
+
+            IConfiguration config = builder.Build();
+
+            ServiceCollection services = new ServiceCollection();
+
+            var mockOptions = Mock.Of<AWSOptions>();
+
+            services.AddDefaultAWSOptions(mockOptions);
+            services.TryAddDefaultAWSOptions(s => config.GetAWSOptions());
+
+            var serviceProvider = services.BuildServiceProvider();
+
+            var options = serviceProvider.GetService<AWSOptions>();
+            Assert.True(object.ReferenceEquals(options, mockOptions));
+        }
+
         [Fact]
         public void InjectS3ClientWithDefaultConfig()
         {