When testing a table, if the first cell of the table refers to a class (after adding 'Fixture' to the end of the name) that does not extend Fixture, then the following message should appear in that cell:
Class fixtureName is not a fixture.
Here is a fitnesse page that should generate the error
The !path must point to fitnesse.jar
WouldBeFixture is a real class, but is not a Fixture
The error message should show up in the response
Class fit.testFxtr.WouldBeFixture is not a fixture.