improve DbSetMock.

добавлена поддержка асинхронных методов в DbSetMock.
AddDbSetMock также мокает свойство соответствующего типа.

AsbCloudWebApi.Tests/TestHelpter.cs

@@ -2,15 +2,18 @@
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Caching.Memory;
 using Moq;
+using System;
+using System.Collections;
 using System.Collections.Generic;
 using System.Linq;
+using System.Linq.Expressions;
+using System.Threading;
+using System.Threading.Tasks;
 
 namespace AsbCloudWebApi.Tests
 {
     internal static class TestHelpter
     {
-        // Попробовать когда-нибудь https://github.com/MichalJankowskii/Moq.EntityFrameworkCore
-
         public static IMemoryCache MemoryCache = new MemoryCache(new MemoryCacheOptions());
 
         public static AsbCloudDbContext MakeRealTestContext()
@@ -30,22 +33,82 @@ namespace AsbCloudWebApi.Tests
             contextMock.Setup(o => o.Set<T>())
                 .Returns(() => dbSetMock.Object);
 
+            var dbSetProperty = typeof(IAsbCloudDbContext)
+                .GetProperties()
+                .FirstOrDefault(p => p.PropertyType.IsPublic && p.PropertyType == typeof(DbSet<T>));
+
+            if (dbSetProperty is not null)
+            {
+                // https://learn.microsoft.com/ru-ru/dotnet/api/system.linq.expressions.expression?view=net-7.0
+                var objParameterExpr = Expression.Parameter(typeof(IAsbCloudDbContext), "instance");
+                var propertyExpr = Expression.Property(objParameterExpr, dbSetProperty);
+                var expression = Expression.Lambda<Func<IAsbCloudDbContext, DbSet<T>>>(propertyExpr, objParameterExpr);
+                contextMock.SetupGet(expression).Returns(dbSetMock.Object);
+            }
+
             return contextMock;
         }
 
         public static Mock<DbSet<T>> MakeDbSetMock<T>()
             where T : class
+        => MakeDbSetMock(new List<T>());
+        
+        class DummyAsyncQueriable<T> : IQueryable<T>, IAsyncEnumerable<T>            
         {
-            var dbSetData = new List<T>();
-            return MakeDbSetMock(dbSetData);
+            private readonly IQueryable<T> queriable;
+
+            public Type ElementType => queriable.ElementType;
+
+            public Expression Expression => queriable.Expression;
+
+            public IQueryProvider Provider => queriable.Provider;
+
+            class QueriableAsyncEminaretor<T2> : IAsyncEnumerator<T2>
+            {
+                private readonly IEnumerator<T2> syncEnumerator;
+
+                public QueriableAsyncEminaretor(IEnumerator<T2> syncEnumerator)
+                {
+                    this.syncEnumerator = syncEnumerator;
+                }
+
+                public T2 Current => syncEnumerator.Current;
+
+                public ValueTask DisposeAsync()
+                {
+                    syncEnumerator.Dispose();
+                    return ValueTask.CompletedTask;
+                }
+                
+                public ValueTask<bool> MoveNextAsync() 
+                {
+                    var result = syncEnumerator.MoveNext();
+                    return ValueTask.FromResult(result);
+                }
+            }
+
+            public DummyAsyncQueriable(IEnumerable<T> dbSetData)
+            {
+                queriable = dbSetData.ToList().AsQueryable();
+            }
+
+            public IAsyncEnumerator<T> GetAsyncEnumerator(CancellationToken cancellationToken = default)
+            {
+                var enumerator = this.AsEnumerable().GetEnumerator();
+                return new QueriableAsyncEminaretor<T>(enumerator);
+            }
+
+            public IEnumerator<T> GetEnumerator()
+            => queriable.GetEnumerator();
+
+            IEnumerator IEnumerable.GetEnumerator()
+            => queriable.GetEnumerator();
         }
 
         public static Mock<DbSet<T>> MakeDbSetMock<T>(IEnumerable<T> dbSetData)
             where T : class
         {
-            var dbSetDataQueriable = dbSetData
-                .ToList()
-                .AsQueryable();
+            var dbSetDataQueriable = new DummyAsyncQueriable<T>(dbSetData);
 
             Mock<DbSet<T>> dbSetMock = new();
             dbSetMock.As<IQueryable<T>>().Setup(o => o.Provider).Returns(() => dbSetDataQueriable.Provider);
@@ -53,6 +116,10 @@ namespace AsbCloudWebApi.Tests
             dbSetMock.As<IQueryable<T>>().Setup(o => o.ElementType).Returns(() => dbSetDataQueriable.ElementType);
             dbSetMock.As<IQueryable<T>>().Setup(o => o.GetEnumerator()).Returns(() => dbSetDataQueriable.GetEnumerator());
 
+            dbSetMock.As<IAsyncEnumerable<T>>()
+                .Setup(o => o.GetAsyncEnumerator(It.IsAny<CancellationToken>()))
+                .Returns(() => dbSetDataQueriable.GetAsyncEnumerator());
+
             return dbSetMock;
         }
     }