TDD With BabyMock Using Pharo Smalltalk

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BabyMock is a mock library for pharo smalltalk.

I demonstrate the basic functionality and the visual mode of BabyMock by TDD’ing a simplified version of a cashregister “kata”.
You can find the full version of this kata in the “Using Mocks And Tests To Design Role-Based Objects” article by Isaiah Perumalla: