Ignore nullable value types

src/AutoTest.ArgumentNullException/AutoTest.ArgumentNullException.csproj

@@ -55,6 +55,7 @@
     <Compile Include="Filter\MethodExtensions.cs" />
     <Compile Include="Filter\NotAbstractMethod.cs" />
     <Compile Include="Filter\NotEqualsMethod.cs" />
+    <Compile Include="Filter\NotNullableValueType.cs" />
     <Compile Include="Filter\NotOutParameter.cs" />
     <Compile Include="Filter\NotPropertySetter.cs" />
     <Compile Include="Filter\TypeFiltering.cs" />

src/AutoTest.ArgumentNullException/Filter/NotNullableValueType.cs

@@ -0,0 +1,36 @@
+namespace AutoTest.ArgNullEx.Filter
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Linq;
+    using System.Reflection;
+
+    /// <summary>
+    /// Filters out parameters that are <see cref="Nullable{T}"/> value types.
+    /// </summary>
+    public sealed class NotNullableValueType : FilterBase, IParameterFilter
+    {
+        /// <summary>
+        /// Filters out parameters that are <see cref="Nullable{T}"/> value types.
+        /// </summary>
+        /// <param name="type">The type.</param>
+        /// <param name="method">The method.</param>
+        /// <param name="parameter">The parameter.</param>
+        /// <returns><see langword="true"/> if the <paramref name="parameter"/> should be excluded;
+        /// otherwise <see langword="false"/>.</returns>
+        /// <exception cref="ArgumentNullException">The <paramref name="type"/>, <paramref name="method"/> or
+        /// <paramref name="parameter"/> parameters are <see langword="null"/>.</exception>
+        bool IParameterFilter.ExcludeParameter(Type type, MethodBase method, ParameterInfo parameter)
+        {
+            if (type == null)
+                throw new ArgumentNullException(nameof(type));
+            if (method == null)
+                throw new ArgumentNullException(nameof(method));
+            if (parameter == null)
+                throw new ArgumentNullException(nameof(parameter));
+
+            Type parameterType = parameter.ParameterType;
+            return parameterType.IsGenericType && parameterType.GetGenericTypeDefinition() == typeof(Nullable<>);
+        }
+    }
+}

src/Tests/AutoTest.ArgumentNullException.Tests/AutoTest.ArgumentNullException.Tests.csproj

@@ -78,6 +78,7 @@
     <Compile Include="Execution\DefaultExecutionSetupShould.cs" />
     <Compile Include="Execution\ErroredExecutionSetupShould.cs" />
     <Compile Include="Filter\NotAbstractMethodShould.cs" />
+    <Compile Include="Filter\NotNullableValueTypeShould.cs" />
     <Compile Include="Filter\NotOutParameterShould.cs" />
     <Compile Include="Filter\NotPropertySetterShould.cs" />
     <Compile Include="Filter\ParameterFilteringShould.cs" />

src/Tests/AutoTest.ArgumentNullException.Tests/Filter/NotNullableValueTypeShould.cs

@@ -0,0 +1,58 @@
+namespace AutoTest.ArgNullEx.Filter
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Linq;
+    using System.Reflection;
+    using global::Xunit;
+
+    public class NotNullableValueTypeShould
+    {
+        private static void SomeNullableParametersMethod(
+            int intInput,
+            string stringInput,
+            Guid guidInput,
+            int? intNullable,
+            Guid? guidNullable)
+        {
+        }
+
+        public static IEnumerable<object[]> SomeOutParameters => GetSomeOutParameters();
+
+        internal static IEnumerable<object[]> GetSomeOutParameters()
+        {
+            Type type = typeof(NotNullableValueTypeShould);
+
+            MethodInfo method = type.GetMethod(
+                nameof(SomeNullableParametersMethod),
+                BindingFlags.NonPublic | BindingFlags.Static);
+            ParameterInfo[] someOutParameters = method.GetParameters();
+
+            return someOutParameters.Select(
+                parameter => new object[] { type, method, parameter, parameter.Name.Contains("Nullable") });
+        }
+
+        [Theory, AutoMock]
+        public void ReturnName(NotNullableValueType sut)
+        {
+            Assert.Equal(nameof(NotNullableValueType), sut.Name);
+        }
+
+        [Theory, MemberData(nameof(SomeOutParameters))]
+        public void ExcludeNullableValueTypeParameter(
+            Type type,
+            MethodInfo method,
+            ParameterInfo parameter,
+            bool expected)
+        {
+            // Arrange
+            IParameterFilter sut = new NotNullableValueType();
+
+            // Act
+            bool actual = sut.ExcludeParameter(type, method, parameter);
+
+            // Assert
+            Assert.Equal(expected, actual);
+        }
+    }
+}

src/Tests/AutoTest.ExampleLibrary.Tests/AutoTest.ExampleLibrary.Tests.csproj

@@ -77,6 +77,7 @@
     <Compile Include="Issues\Issue015\Issue015.cs" />
     <Compile Include="Issues\Issue020\Issue020.cs" />
     <Compile Include="Issues\Issue022\Issue022.cs" />
+    <Compile Include="Issues\Issue031\Issue031.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="RequiresArgNullEx.cs" />
     <Compile Include="RequiresArgNullExAutoMoqAttribute.cs" />

src/Tests/AutoTest.ExampleLibrary.Tests/Issues/Issue031/Issue031.cs

@@ -0,0 +1,26 @@
+namespace AutoTest.ExampleLibrary.Issues.Issue031
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Linq;
+    using System.Threading.Tasks;
+    using AutoTest.ArgNullEx;
+    using AutoTest.ArgNullEx.Xunit;
+    using Xunit;
+
+    public class Issue031
+    {
+        [Theory, RequiresArgNullExAutoMoq(typeof(SomeNullableValueTypeParameters))]
+        [Include(
+            ExclusionType = ExclusionType.All,
+            Type = typeof(SomeNullableValueTypeParameters),
+            Method = "SomeNullableValueTypeParametersMethod",
+            Parameter = "stringInput")]
+        public async Task TestStringInput(MethodData method)
+        {
+            await method.Execute();
+
+            Assert.True(SomeNullableValueTypeParameters.StringInputTested);
+        }
+    }
+}

src/Tests/AutoTest.ExampleLibrary/AutoTest.ExampleLibrary.csproj

@@ -52,6 +52,7 @@
     <Compile Include="Issues\Issue015\OtherEquals.cs" />
     <Compile Include="Issues\Issue020\Mixture.cs" />
     <Compile Include="Issues\Issue022\GenericClass.cs" />
+    <Compile Include="Issues\Issue031\SomeNullableValueTypeParameters.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />

src/Tests/AutoTest.ExampleLibrary/Issues/Issue031/SomeNullableValueTypeParameters.cs

@@ -0,0 +1,37 @@
+namespace AutoTest.ExampleLibrary.Issues.Issue031
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Linq;
+
+    /// <summary>
+    /// Test class used to demonstrate pull request 31
+    /// https://github.com/AutoTestNET/AutoTest.ArgumentNullException/pull/31
+    /// </summary>
+    public class SomeNullableValueTypeParameters
+    {
+        /// <summary>
+        /// Gets a value indicating if the <see cref="SomeNullableValueTypeParametersMethod"/> stringInput parameter
+        /// has been tested.
+        /// </summary>
+        public static bool StringInputTested { get; private set; }
+
+        private static void SomeNullableValueTypeParametersMethod(
+            int intInput,
+            string stringInput,
+            Guid guidInput,
+            int? intNullable,
+            Guid? guidNullable)
+        {
+            StringInputTested = false;
+
+            if (stringInput == null)
+            {
+                StringInputTested = true;
+                throw new ArgumentNullException(nameof(stringInput));
+            }
+
+            throw new Exception("Shouldn't ever get here.");
+        }
+    }
+}