Added ActionResultOfTTestBuilder (#359)

Author: ivaylokenov

src/MyTested.AspNetCore.Mvc.Controllers/Builders/ActionResults/ActionResult/ActionResultOfTTestBuilder.cs

@@ -1,6 +1,29 @@
 namespace MyTested.AspNetCore.Mvc.Builders.ActionResults.ActionResult
 {
-    public class ActionResultOfTTestBuilder
+    using Builders.Base;
+    using Contracts.ActionResults.ActionResult;
+    using Internal.TestContexts;
+
+    /// <summary>
+    /// Used for testing <see cref="Microsoft.AspNetCore.Mvc.ActionResult{TResult}"/>.
+    /// </summary>
+    /// <typeparam name="TResult">Type of the expected result.</typeparam>
+    public class ActionResultOfTTestBuilder<TResult>
+        : BaseTestBuilderWithActionResult<TResult>,
+        IAndActionResultOfTTestBuilder<TResult>
     {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ActionResultOfTTestBuilder{TResult}"/> class.
+        /// </summary>
+        /// <param name="testContext">
+        /// <see cref="ControllerTestContext"/> containing data about the currently executed assertion chain.
+        /// </param>
+        public ActionResultOfTTestBuilder(ControllerTestContext testContext) 
+            : base(testContext)
+        {
+        }
+
+        /// <inheritdoc />
+        public IActionResultOfTTestBuilder<TResult> AndAlso() => this;
     }
 }

src/MyTested.AspNetCore.Mvc.Controllers/Builders/Contracts/ActionResults/ActionResult/IAndActionResultOfTTestBuilder.cs

@@ -6,6 +6,7 @@
     /// </summary>
     /// <typeparam name="TResult">Type of the expected result.</typeparam>
     public interface IAndActionResultOfTTestBuilder<TResult>
+        : IActionResultOfTTestBuilder<TResult>
     {
         /// <summary>
         /// AndAlso method for better readability when