Test::Count is a set of perl modules for keeping track of the number of
tests in a test file. It works by putting in comments of the form '# TEST'
(one test), '# TEST*$EXPR' or '# TEST+$EXPR' (both are multiple tests).
Test::Count counts these tests throughout the file and returns all of their
results.

One can put any mathematical expressions (using parentheses, '+', '-', '*',
'/' and '%' there). One can also assign variables using '#
TEST:$myvar=5+6;$second_var=$myvar+3' and later use them in the add to
count expressions. A '$var++' construct is also available.

One can find example test scripts under t/.