When a bug is found tests
are created to guard against it coming back. A bug in production requires an acceptance test be written to guard
against it. Creating an acceptance test first before debugging helps customers
concisely define the problem and communicate that problem to the programmers. Programmers have a failed test to
focus their efforts and know when the problem is fixed. Given a failed acceptance
test, developers can create unit tests to show the defect from a more source code
specific point of view. Failing unit tests give immediate feedback to the development effort when the bug has been
repaired. When the unit tests run at 100% then the failing acceptance test can be run again to validate the bug
is fixed.
When a bug is found tests
are created to guard against it coming back. A bug in production requires an acceptance test be written to guard
against it. Creating an 
