Add custom consumer selector unit test

src/DotNetCore.CAP/IConsumerServiceSelector.Default.cs

@@ -23,7 +23,7 @@ namespace DotNetCore.CAP
         private readonly IServiceProvider _serviceProvider;
 
         /// <summary>
-        /// since this class be designed as a Singleton service,the following two list must be thread safe!!!
+        /// since this class be designed as a Singleton service,the following two list must be thread safe!
         /// </summary>
         private readonly ConcurrentDictionary<string, List<RegexExecuteDescriptor<ConsumerExecutorDescriptor>>> _asteriskList;
         private readonly ConcurrentDictionary<string, List<RegexExecuteDescriptor<ConsumerExecutorDescriptor>>> _poundList;

test/DotNetCore.CAP.Test/CustomConsumerSubscribeTest.cs

+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using System.Threading.Tasks;
+using Microsoft.Extensions.DependencyInjection;
+using Xunit;
+
+namespace DotNetCore.CAP.Test
+{
+    public class CustomConsumerSubscribeTest
+    {
+        private readonly IServiceProvider _provider;
+
+        public CustomConsumerSubscribeTest()
+        {
+            var services = new ServiceCollection();
+            services.AddSingleton<IConsumerServiceSelector, MyConsumerServiceSelector>();
+            services.AddTransient<IMySubscribe, CustomInterfaceTypesClass>();
+            services.AddLogging();
+            services.AddCap(x => { });
+            _provider = services.BuildServiceProvider();
+        }
+
+        [Fact]
+        public void CanFindAllConsumerService()
+        {
+            var selector = _provider.GetRequiredService<IConsumerServiceSelector>();
+            var candidates = selector.SelectCandidates();
+
+            Assert.Equal(2, candidates.Count);
+        }
+
+        [Fact]
+        public void CanFindSpecifiedTopic()
+        {
+            var selector = _provider.GetRequiredService<IConsumerServiceSelector>();
+            var candidates = selector.SelectCandidates();
+            var bestCandidates = selector.SelectBestCandidate("Candidates.Foo", candidates);
+
+            Assert.NotNull(bestCandidates);
+            Assert.NotNull(bestCandidates.MethodInfo);
+            Assert.Equal(typeof(Task), bestCandidates.MethodInfo.ReturnType);
+        }
+    }
+
+    public class MyConsumerServiceSelector : DefaultConsumerServiceSelector
+    {
+        private readonly CapOptions _capOptions;
+
+        public MyConsumerServiceSelector(IServiceProvider serviceProvider, CapOptions capOptions)
+            : base(serviceProvider, capOptions)
+        {
+            _capOptions = capOptions;
+        }
+
+        protected override IEnumerable<ConsumerExecutorDescriptor> FindConsumersFromInterfaceTypes(IServiceProvider provider)
+        {
+            var executorDescriptorList = new List<ConsumerExecutorDescriptor>();
+
+            using (var scoped = provider.CreateScope())
+            {
+                var scopedProvider = scoped.ServiceProvider;
+                var consumerServices = scopedProvider.GetServices<IMySubscribe>();
+                foreach (var service in consumerServices)
+                {
+                    var typeInfo = service.GetType().GetTypeInfo();
+                    if (!typeof(IMySubscribe).GetTypeInfo().IsAssignableFrom(typeInfo))
+                    {
+                        continue;
+                    }
+
+                    executorDescriptorList.AddRange(GetMyDescription(typeInfo));
+                }
+
+                return executorDescriptorList;
+            }
+        }
+
+        private IEnumerable<ConsumerExecutorDescriptor> GetMyDescription(TypeInfo typeInfo)
+        {
+            foreach (var method in typeInfo.DeclaredMethods)
+            {
+                var topicAttr = method.GetCustomAttributes<MySubscribeAttribute>(true);
+                var topicAttributes = topicAttr as IList<MySubscribeAttribute> ?? topicAttr.ToList();
+
+                if (!topicAttributes.Any())
+                {
+                    continue;
+                }
+
+                foreach (var attr in topicAttributes)
+                {
+                    if (attr.Group == null)
+                    {
+                        attr.Group = _capOptions.DefaultGroup + "." + _capOptions.Version;
+                    }
+                    else
+                    {
+                        attr.Group = attr.Group + "." + _capOptions.Version;
+                    }
+
+                    yield return new ConsumerExecutorDescriptor
+                    {
+                        Attribute = new CapSubscribeAttribute(attr.Name)
+                        {
+                            Group = attr.Group
+                        },
+                        MethodInfo = method,
+                        ImplTypeInfo = typeInfo
+                    };
+                }
+            }
+        }
+    }
+
+    public interface IMySubscribe { }
+
+    public class MySubscribeAttribute : Attribute
+    {
+        public MySubscribeAttribute(string name)
+        {
+            Name = name;
+        }
+
+        public string Name { get; }
+
+        public string Group { get; set; }
+    }
+
+    public class CustomInterfaceTypesClass : IMySubscribe
+    {
+        [MySubscribe("Candidates.Foo")]
+        public Task GetFoo()
+        {
+            Console.WriteLine("GetFoo() method has been excuted.");
+            return Task.CompletedTask;
+        }
+
+        [MySubscribe("Candidates.Foo2")]
+        public void GetFoo2()
+        {
+            Console.WriteLine("GetFoo2() method has been excuted.");
+        }
+
+        public void DistracterMethod()
+        {
+            Console.WriteLine("DistracterMethod() method has been excuted.");
+        }
+    }
+}
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