Use the "error" keyword when you expect an error. In this case, an error turns the cell a nice shade of green!

This example uses a fixture that has string property and two string methods that throw errors - one that throws it directly and one that throws it by delegating to another method that throws an error. See the cells turn yellow when you specify a value

when test is⇓

error throwing fixture
error throwing method()	error throwing property()	redirect to error throwing method()
expecting	string	values

then result is

error throwing fixture
error throwing method()	error throwing property()	redirect to error throwing method()
expecting Error in the application.	string Error in the application.	values Error in the application.

When you use the error keyword and errors are received, however, the cells turn green.

when test is⇓

error throwing fixture
error throwing method()	error throwing property()	redirect to error throwing method()
error	error	error

then result is

error throwing fixture
error throwing method()	error throwing property()	redirect to error throwing method()
error	error	error