public async Task Return_Errors_When_Validation_Fails()
{
//Arrange
const string warning = "You cannot update Category";
var logic = Create();
await CategoryValidator.SetValidatorFailure(warning);
//Act
var result = await logic.Update(Category);
//Assert
result.Should()
.BeFailure(warning);
CategoryValidator.Verify(v => v.ValidateAsync(Category, It.IsAny <CancellationToken>()), Times.Once());
Repository.Verify(r => r.SaveChanges(), Times.Never);
}