public void GetCustomerById_Should_Success_When_InputPositiveInteger()
{
//Arrange
var customerId = 5;
//Act
var validationService = new CustomerValidation();
var result = validationService.ValidationCustomerId(customerId);
//Assert
Assert.True(string.IsNullOrEmpty(result));
}
public void GetCustomerById_Should_Fail_When_InputNegativeInteger()
{
//Arrange
var customerId = -2;
//Act
var validationService = new CustomerValidation();
var result = validationService.ValidationCustomerId(customerId);
//Assert
Assert.False(string.IsNullOrEmpty(result));
}