fix(transactions): locate services using request scoped service provider

Author: jaredcnance

src/JsonApiDotNetCore/Internal/Generics/GenericProcessorFactory.cs

@@ -14,15 +14,19 @@ public interface IGenericProcessorFactory
         /// Constructs the generic type and locates the service, then casts to TInterface
         /// </summary>
         /// <example>
+        /// <code>
         ///     GetProcessor&lt;IGenericProcessor&gt;(typeof(GenericProcessor&lt;&gt;), typeof(TResource));
+        /// </code>
         /// </example>
         TInterface GetProcessor<TInterface>(Type openGenericType, Type resourceType);
 
         /// <summary>
         /// Constructs the generic type and locates the service, then casts to TInterface
         /// </summary>
         /// <example>
+        /// <code>
         ///     GetProcessor&lt;IGenericProcessor&gt;(typeof(GenericProcessor&lt;,&gt;), typeof(TResource), typeof(TId));
+        /// </code>
         /// </example>
         TInterface GetProcessor<TInterface>(Type openGenericType, Type resourceType, Type keyType);
     }

test/JsonApiDotNetCoreExampleTests/Acceptance/TestFixture.cs

@@ -5,6 +5,7 @@
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.TestHost;
 using JsonApiDotNetCore.Services;
+using JsonApiDotNetCore.Data;
 
 namespace JsonApiDotNetCoreExampleTests.Acceptance
 {
@@ -22,7 +23,7 @@ public TestFixture()
             _services = _server.Host.Services;
 
             Client = _server.CreateClient();
-            Context = GetService<AppDbContext>();
+            Context = GetService<IDbContextResolver>().GetContext() as AppDbContext;
             DeSerializer = GetService<IJsonApiDeSerializer>();
             JsonApiContext = GetService<IJsonApiContext>();
         }