Added ViewComponent testing to the MusicStore sample (#66)

Author: ivaylokenov

samples/MusicStore/MusicStore.Test/Components/CartSummaryComponentTest.cs

@@ -0,0 +1,55 @@
+namespace MusicStore.Test.Components
+{
+    using Models;
+    using MusicStore.Components;
+    using MyTested.AspNetCore.Mvc;
+    using System.Collections.Generic;
+    using System.Linq;
+    using Xunit;
+
+    public class CartSummaryComponentTest
+    {
+        [Fact]
+        public void ComponentShouldReturnCartedItems()
+        {
+            var cartId = "CartId_A";
+            var albumName = "AlbumA";
+            var totalCartItems = 10;
+
+            MyMvc
+                .ViewComponent<CartSummaryComponent>()
+                .WithSession(session => session.WithEntry("Session", cartId))
+                .WithDbContext(dbContext => dbContext
+                    .WithEntities(entities => entities
+                        .AddRange(GetCartItems(cartId, albumName, totalCartItems))))
+                .InvokedWith(vc => vc.InvokeAsync())
+                .ShouldHave()
+                .ViewBag(viewBag => viewBag
+                    .ContainingEntry("CartCount", totalCartItems)
+                    .ContainingEntry("CartSummary", albumName))
+                .AndAlso()
+                .ShouldReturn()
+                .View();
+        }
+
+        private static IEnumerable<CartItem> GetCartItems(string cartId, string albumTitle, int itemCount)
+        {
+            var album = new Album()
+            {
+                AlbumId = 1,
+                Title = albumTitle,
+            };
+
+            return Enumerable
+                .Range(1, itemCount)
+                .Select(n => new CartItem
+                {
+                    AlbumId = 1,
+                    Album = album,
+                    Count = 1,
+                    CartId = cartId,
+                })
+                .ToArray();
+        }
+    }
+}

samples/MusicStore/MusicStore.Test/Components/GenreMenuComponentTest.cs

@@ -0,0 +1,28 @@
+namespace MusicStore.Test.Components
+{
+    using Models;
+    using MusicStore.Components;
+    using MyTested.AspNetCore.Mvc;
+    using System.Collections.Generic;
+    using System.Linq;
+    using Xunit;
+
+    public class GenreMenuComponentTest
+    {
+        [Fact]
+        public void ComponentShouldReturnNineGenres()
+        {
+            MyMvc
+                .ViewComponent<GenreMenuComponent>()
+                .WithDbContext(dbContext => dbContext
+                    .WithEntities(entities => entities.AddRange(GetGenres)))
+                .InvokedWith(vc => vc.InvokeAsync())
+                .ShouldReturn()
+                .View()
+                .WithModelOfType<IEnumerable<string>>()
+                .Passing(g => g.Count() == 9);
+        }
+
+        private static IEnumerable<Genre> GetGenres => Enumerable.Range(1, 10).Select(n => new Genre { GenreId = n });
+    }
+}

src/MyTested.AspNetCore.Mvc.ViewComponents/Builders/Base/BaseTestBuilderWithViewComponent.cs

@@ -4,11 +4,11 @@
     using Contracts.Base;
     using Internal.TestContexts;
     using Utilities.Validators;
-
+    
     /// <summary>
     /// Base class for all test builders with view component.
     /// </summary>
-    public class BaseTestBuilderWithViewComponent : BaseTestBuilderWithComponent, IBaseTestBuilderWithViewComponent
+    public abstract class BaseTestBuilderWithViewComponent : BaseTestBuilderWithComponent, IBaseTestBuilderWithViewComponent
     {
         private ViewComponentTestContext testContext;
 

src/MyTested.AspNetCore.Mvc.ViewComponents/Builders/Invocations/ShouldHave/ViewComponentShouldHaveTestBuilder.cs

@@ -13,6 +13,7 @@ public partial class ViewComponentShouldHaveTestBuilder<TInvocationResult>
         public ViewComponentShouldHaveTestBuilder(ViewComponentTestContext testContext)
             : base(testContext)
         {
+            this.TestContext = testContext;
         }
 
         /// <summary>

src/MyTested.AspNetCore.Mvc.ViewComponents/Builders/ViewComponents/ViewComponentInvocationBuilder.cs

@@ -39,7 +39,7 @@ private void SetViewComponentDescriptor(MethodInfo methodInfo)
             if (viewComponentContext.ViewComponentDescriptor?.MethodInfo == null)
             {
                 var viewComponentDescriptorCache = this.Services.GetService<IViewComponentDescriptorCache>();
-                if (viewComponentDescriptorCache == null)
+                if (viewComponentDescriptorCache != null)
                 {
                     viewComponentContext.ViewComponentDescriptor
                         = viewComponentDescriptorCache.TryGetViewComponentDescriptor(methodInfo);

src/MyTested.AspNetCore.Mvc.ViewComponents/Plugins/ViewComponentsTestPlugins.cs renamed to src/MyTested.AspNetCore.Mvc.ViewComponents/Plugins/ViewComponentsTestPlugin.cs

@@ -5,7 +5,7 @@
     using Internal.TestContexts;
     using Utilities;
 
-    public class ViewComponentsTestPlugins : BaseTestPlugin, IDefaultRegistrationPlugin, IServiceRegistrationPlugin, IShouldPassForPlugin
+    public class ViewComponentsTestPlugin : BaseTestPlugin, IDefaultRegistrationPlugin, IServiceRegistrationPlugin, IShouldPassForPlugin
     {
         private readonly Type viewComponentAttributesType = typeof(ViewComponentAttributes);