Homework 4, Exceptions and Testing.

Short Description:

This assignment is worth 20 points.

Goals

• Added exceptions to your Doubly linked circular list.
• Test your program.

If you need a copy of DListT.cpp a semi-working version is provided.

Formal Description

1. Modify your DListT::Delete() function to throw an out_of_range exception.

   The text should be "DListT::Delete: Attempt to delete from an empty list."

   Remove printing the error from your class code. Your list class should not print ANY messages when you are finished.

2. Modify your DListT::Data() function so that it throws a custom exception when the user attempts to access data when the current pointer is not valid.

   Your exception should be derived from the logic_error class and should be called invalid_current.

   The text of the error should be "DListT::Data: Invalid data access attempt."

   Remove printing the error from your class code. Your list class should not print ANY messages when you are finished.

3. Modify the test driver given
   1. Build a test case to test the InsertAfter
      • In the comments before this section describe, in detail, your test plan.
      • Implement this test plan in the test case.
   2. Build a test case to test each of your two exceptions. (There should be two distinct tests routines for this).
      • Make sure to test that the correct text is returned.
      • Make sure that the various parent exceptions are caught. (exception, logic_error, invalid_current)

Required Files

Submission