Filter out props for validation

src/Directory.Build.props

@@ -1,7 +1,7 @@
 <Project>
 
   <PropertyGroup>
-    <VersionPrefix>0.9.1</VersionPrefix>
+    <VersionPrefix>0.9.2</VersionPrefix>
     <!-- VersionSuffix used for local builds -->
     <VersionSuffix>dev</VersionSuffix>
     <!-- VersionSuffix to be used for CI builds -->

src/MiniValidation/MiniValidator.cs

@@ -393,6 +393,12 @@ private static async Task<bool> TryValidateImpl(
 
         foreach (var property in typeProperties)
         {
+            // Skip properties that don't have validation attributes if we're not recursing
+            if (!(property.HasValidationAttributes || recurse))
+            {
+                continue;
+            }
+
             var propertyValue = property.GetValue(target);
             var propertyValueType = propertyValue?.GetType();
             var (properties, _) = _typeDetailsCache.Get(propertyValueType);

tests/MiniValidation.UnitTests/Recursion.cs

@@ -467,4 +467,29 @@ public async Task Invalid_When_Polymorphic_AsyncValidatableOnlyChild_Is_Invalid(
         Assert.Single(errors);
         Assert.Equal($"{nameof(TestValidatableType.PocoChild)}.{nameof(TestAsyncValidatableChildType.TwentyOrMore)}", errors.Keys.First());
     }
+
+    [Fact]
+    public async Task Throws_When_Validates_With_Recurse_And_Object_Has_Not_Implemented_Property()
+    {
+        var thingToValidate = new TestTypeWithNotImplementedProperty
+        {
+            PropertyToBeRequired = "test1"
+        };
+
+
+        await Assert.ThrowsAsync<Exception>(async () => await MiniValidator.TryValidateAsync(thingToValidate, recurse: true));
+    }
+
+    [Fact]
+    public async Task DoesntThrow_When_Validates_Without_Recurse_And_Object_Has_Not_Implemented_Property()
+    {
+        var thingToValidate = new TestTypeWithNotImplementedProperty
+        {
+            PropertyToBeRequired = "test1"
+        };
+
+        var (isValid, _) = await MiniValidator.TryValidateAsync(thingToValidate, recurse: false);
+
+        Assert.True(isValid);
+    }
 }

tests/MiniValidation.UnitTests/TestTypes.cs

@@ -258,4 +258,12 @@ class TestTypeForTypeDescriptor
 
     [MaxLength(1)]
     public string? AnotherProperty { get; set; } = "Test";
-}
+}
+
+class TestTypeWithNotImplementedProperty
+{
+    [Required]
+    public string? PropertyToBeRequired { get; set; }
+
+    public TestTypeForTypeDescriptor NotImplementedProperty => throw new Exception();
+}

tests/MiniValidation.UnitTests/TryValidate.cs

@@ -450,11 +450,11 @@ public async Task TryValidateAsync_Enumerable_With_ServiceProvider()
     [Fact]
     public async Task TryValidateAsync_With_Attribute_Attached_Via_TypeDescriptor()
     {
-        var thingToValidate = new TestTypeForTypeDescriptor();
-
         typeof(TestTypeForTypeDescriptor).AttachAttribute(
-            nameof(TestTypeForTypeDescriptor.PropertyToBeRequired), 
-            _ => new RequiredAttribute());
+                nameof(TestTypeForTypeDescriptor.PropertyToBeRequired),
+                _ => new RequiredAttribute());
+
+        var thingToValidate = new TestTypeForTypeDescriptor();
 
         var (isValid, errors) = await MiniValidator.TryValidateAsync(thingToValidate);