validation option test

test/Danom.Validation.Tests/ValidationOptionTests.cs

@@ -0,0 +1,43 @@
+namespace Danom.Validation.Tests;
+
+using Xunit;
+using FluentValidation;
+using Danom.TestHelpers;
+
+public sealed class ValidationOptionTests
+{
+    [Fact]
+    public void ReturnsSomeOption_WhenValidationSucceeds()
+    {
+        var input = new TestInput { Value = 1 };
+        var result = ValidationOption<TestInput>.From<TestInputValidator>(input);
+
+        AssertOption.IsNone(result);
+        Assert.False(result.IsSome);
+    }
+
+    [Fact]
+    public void ReturnsNoneOption_WhenValidationFails()
+    {
+        var input = new TestInput { Value = 0 };
+        var result = ValidationOption<TestInput>.From<TestInputValidator>(input);
+
+        AssertOption.IsNone(result);
+        Assert.False(result.IsSome);
+    }
+
+    public sealed class TestInput
+    {
+        public int Value { get; set; }
+
+        public override string ToString() => Value.ToString();
+    }
+
+    public sealed class TestInputValidator : AbstractValidator<TestInput>
+    {
+        public TestInputValidator()
+        {
+            RuleFor(x => x.Value).GreaterThan(0);
+        }
+    }
+}