Parameter random instructs the Unit Test
Framework to execute the test cases in random order. This parameter
accepts an optional
unsigned integer argument for the seed of the
test cases are executed in some specific order defined by the order
of test units in the test files, and the dependencies between test
1, the testing order is
randomized based on current time.
will be used as random seed for the run.
1: random seed based on
the current time
: seed for the random number generator