@@GLOBAL.innodb_file_per_table can be 0 or 1, while
SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
WHERE VARIABLE_NAME='innodb_file_per_table'
can be 'OFF' or 'ON'.  For some reason, MySQL evaluates
(0 = 'OFF') to 1 and (1 = 'ON') to 0.  Thus, the test would
fail if innodb_file_per_table is set.