cherry pick BenMorris/NetArchTest#119

Author: NeVeSpl

src/NetArchTest.Rules/NetArchTest.csproj

@@ -5,7 +5,7 @@
     <Version>1.3.4</Version>
     <Authors>NeVeSpl</Authors>
     <Product>NetArchTest.eNhancedEdition </Product>
-    <Description>A fluent API for .Net Standard that can enforce architectural rules in unit tests.</Description>
+    <Description>A fluent API for .Net Standard that can enforce architectural rules in unit tests. Improved version, built upon NetArchTest.Rules v1.3.2.</Description>
     <Copyright>(c) NetArchTest.eNhancedEdition</Copyright>
     <PackageLicense>https://github.com/NeVeSpl/NetArchTest.eNhancedEdition/blob/master/LICENSE</PackageLicense>
     <PackageProjectUrl>https://github.com/NeVeSpl/NetArchTest.eNhancedEdition</PackageProjectUrl>

src/NetArchTest.Rules/TestResult.cs

@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
 using NetArchTest.Assemblies;
@@ -27,7 +28,7 @@ private TestResult()
         /// <remarks>
         /// This method loads all the types and may throw dependency loading errors if the test project does not have a direct dependency on the type being loaded.
         /// </remarks>
-        public IReadOnlyList<IType> FailingTypes { get; private set; }
+        public IReadOnlyList<IType> FailingTypes { get; private set; } = Array.Empty<IType>();
 
 
         /// <summary>

test/NetArchTest.Rules.UnitTests/ConditionListTests.cs

@@ -144,8 +144,8 @@ public void GetResult_FailedShouldNot_ReturnFailedTypes()
             Assert.Contains<Type>(typeof(ClassA3), result.FailingTypes.Select(x => x.ReflectionType));
         }
 
-        [Fact(DisplayName = "If a condition succeeds then a list of failing types should be null.")]
-        public void GetResult_Success_ReturnNullFailedTypes()
+        [Fact(DisplayName = "If a condition succeeds then a list of failing types should be empty.")]
+        public void GetResult_Success_ReturnEmptyFailedTypes()
         {
             var result = Types
                 .InAssembly(Assembly.GetAssembly(typeof(ClassA1)))
@@ -162,7 +162,7 @@ public void GetResult_Success_ReturnNullFailedTypes()
                 .GetResult();
 
             Assert.True(result.IsSuccessful);
-            Assert.Null(result.FailingTypes);
+            Assert.Empty(result.FailingTypes);
         }
     }
 }