This milestone will be complete when functional unit tests and integration tests have been written to cover major functionality of:

• Pebble class
• MCReader class
• Pebble packing
• Pebble movement
• Core class

This milestone is not meant to be comprehensive, as a test framework will live alongside the code with continuous improvement. However, a baseline set of tests that demonstrate what this code is meant to do will drive development. This can be closed when some basic tests exist to establish those fundamental features.