Hi,

You probably misunderstood the task.�

On the first part I have to make a class named BlankCell which is a subclass of TestCase.

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You had to create the class�BlankCellTestCase�(not BlankCell) which is a subclass of�TestCase.

BlankCell and BlankCellTestCase are two different classes.

-BlankCell is a class that represents a model of an empty cell (its size, segments etc.)

-BlankCellTestCase is basically a class that helps you to control (and test) methods that you have on BlankCell class.

But when you are on the MirrorCell part BlankCell must be a subclass of Cell.

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Cell class is an abstract, which is a superclass for following classes: BlankCell, MirrorCell, TargetCell.�

It provides some basic behavior or properties for BlankCell, MirrorCell, TargetCell, which all of them have in common

But then the tests will fail because should: �cannot be found.

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Sure it fails. in order to use�should:�the class BlankCellTestCase has to be a subclass of TestCase.

But it is recommended to use assert:�instead of should:

The manual says nothing about that the new class Cell must be a part of TestCase.

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Cell has to be a subclass of an Object.

Cheers,

Mark

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