We always said that smalltalk is the best for TDD.��
But we not have mocks by default in Pharo while mocks is fundamental part of TDD.
So no kernel tests could benefit from them.��
And more important TDD is design process and without mocks we can't apply it to kernel with full power.
��
What you think to integrate Mocketry in Pharo 6?��
It has comments and documentation (PharoInProgress, Help), advanced features and it is very competitive to any modern mock libraries.

Best regards,
Denis