private void MustFail <T>(Action func, IComparable <String> aStringDescribingFailure, CustomerBook customerBook) where T : Exception
{
try
{
func();
Assert.Fail();
}
catch (T e)
{
Assert.AreEqual(e.Message, aStringDescribingFailure);
Assert.IsTrue(customerBook.isEmpty());
}
}
private void CheckErrorMessageAndEmptyCustomer(String expectedMessage, CustomerBook customerBook, Exception exception)
{
Assert.AreEqual(expectedMessage, exception.Message);
Assert.IsTrue(customerBook.isEmpty());
}
public void CheckIfCustomerBookIsEmpty(CustomerBook customerBook)
{
Assert.IsTrue(customerBook.isEmpty());
}