Modern C++ Programming with Test-Driven Development

8.11 A New Story

Story: Enhance the Descriptor

​Background​: In its penultimate step, the ​open​ function sends a message to a WavDescriptor object, whose job is to append a formatted data record to a descriptor file. The WAV publisher user interface uses the descriptor file’s contents to display available WAVs.

The descriptor accepts the WAV filename, total seconds (before snipping), samples per second, and number of channels.

​Story​: As a content reseller, I want the descriptors for WAV files to also include the new snippet file length. Alter the descriptor object to accept the length.

Someone else will change the implementation of WavDescriptor to include the snippet file length in each record (let’s hope they’re using TDD!). Our job will ...