The fail keyword is primarily used for fixture testing. It tests that a cell is correctly failing.

sample domain

A failing integer comparison is handled.

set	integer field	3
check	integer field	fail[4]

A failing string comparison is handled.

set	string field	hello
check	string field	fail[world]

A failing object comparison is handled.

set	person field	Joe Smith
check	person field	fail[Joe Smithe]

Nested handlers are processed.

set	integer field	3
check	integer field	3 fail[>3]

A nested fail keyword is handled.

set	integer field	3
check	integer field	fail[fail[3]]