public void TestMethod1() { var fluentFishValidator = new FluentFishValidator(); var fish = new Fish(); var validationResult = fluentFishValidator.GetValidationResult(fish); validationResult.HasErrors.Should().Be.True(); validationResult.ValidationIssues.Should().Have.Count.EqualTo(1); validationResult.ValidationIssues.Single().PropertyName.Should().Be.EqualTo("Name"); }