Test and Demo Functions
Perform tests from the first file in the loadpath matching NAME.
Produces an error if the condition is not met.
Return true if CODE fails with an error message matching PATTERN,
otherwise produce an error.
Runs any examples associated with the function 'NAME'.
Display the code for example N associated with the function 'NAME', but
do not run it.
Determine the execution time of an expression for various N.