MSTest is functioning , all tests green

H_PLUS_Sports/H_PLUS_Sports.csproj

@@ -5,6 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="3.1.0" />
     <PackageReference Include="Microsoft.CodeAnalysis.FxCopAnalyzers" Version="2.9.8">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

H_PLUS_Sports/Repositories/OrderRepository.cs

@@ -24,33 +24,33 @@ namespace H_Plus_Sports.Repositories
         public async Task<Order> Add(Order order)
         {
             await _context.Order.AddAsync(order);
-            await _context.SaveChangesAsync();
+            await _context.SaveChangesAsync().ConfigureAwait(true);
             return order;
         }
 
         public async Task<Order> Find(int id)
         {
-            return await _context.Order.Include(order => order.OrderItem).Include(order => order.Customer).SingleOrDefaultAsync(a => a.OrderId == id);
+            return await _context.Order.Include(order => order.OrderItem).Include(order => order.Customer).SingleOrDefaultAsync(a => a.OrderId == id).ConfigureAwait(true);
         }
 
         public async Task<Order> Remove(int id)
         {
             var order = _context.Order.Single(a => a.OrderId == id);
             _context.Order.Remove(order);
-            await _context.SaveChangesAsync();
+            await _context.SaveChangesAsync().ConfigureAwait(true);
             return order;
         }
 
         public async Task<Order> Update(Order order)
         {
             _context.Order.Update(order);
-            await _context.SaveChangesAsync();
+            await _context.SaveChangesAsync().ConfigureAwait(true);
             return order;
         }
 
         public async Task<bool> Exists(int id)
         {
-            return await _context.Order.AnyAsync(e => e.OrderId == id);
+            return await _context.Order.AnyAsync(e => e.OrderId == id).ConfigureAwait(true);
         }
     }
 }

H_PLUS_Sports/Startup.cs

@@ -14,6 +14,7 @@ using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
 
 namespace H_Plus_Sports
 {
@@ -35,7 +36,10 @@ namespace H_Plus_Sports
             services.AddScoped<IProductRepository, ProductRepository>();
             services.AddScoped<ISalespersonRepository, SalespersonRepository>();
 
-            services.AddMvc();
+            services.AddMvc(option => option.EnableEndpointRouting = false)
+                .SetCompatibilityVersion(CompatibilityVersion.Version_3_0)
+                .AddNewtonsoftJson(opt => opt.SerializerSettings.ReferenceLoopHandling = ReferenceLoopHandling.Ignore);
+
             services.AddControllers();
             var connection = "Server=tcp:hsportsoeman.database.windows.net,1433;Initial Catalog=H_Plus_Sports;Persist Security Info=False;User ID=saTfoman;Password=Jes@lin78;MultipleActiveResultSets=False;Encrypt=True;TrustServerCertificate=False;Connection Timeout=30;";
             services.AddDbContext<H_Plus_SportsContext>(options => options.UseSqlServer(connection));

H_Plus_Sports.Tests/CustomerIntegrationTests.cs

@@ -1,11 +1,8 @@
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.TestHost;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
-using System;
-using System.Collections.Generic;
 using System.Net;
 using System.Net.Http;
-using System.Text;
 
 namespace H_Plus_Sports.Tests
 {

H_Plus_Sports.Tests/OrderIntegrationTests.cs

@@ -1,8 +1,8 @@
-using System.Net;
+using Microsoft.AspNetCore.Hosting;
-using System.Net.Http;
-using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.TestHost;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System.Net;
+using System.Net.Http;
 namespace H_Plus_Sports.Tests
 {
     [TestClass]