public void Validate_WhenCustomerIsValid_NothingHappens()
{
//arrange
var customer = new CustomerForTestsBuilder().Build();
//act
customer.Validate();
//assert nothing
}
public void Validate_WhenAddressIsNull_ThrowsInvalidCustomerException()
{
//arrange
var customer = new CustomerForTestsBuilder().WithoutAddress().Build();
//act
var exception = Record.Exception(() => customer.Validate());
//assert
Assert.IsType <CustomerInvalidException>(exception);
}