Void add(Void() test, Int num=1, String name="")
test: A test function. Test functions must return nothing and take no parameters. They should finish with a call to assert for the test conditions.
num: The number of times to run the test (useful if random values are being used). Defaults to 1.
name: A descriptive name for the test, which defaults to the empty string.
Add a test function that runs a test case, finishing with a call to 'assert'