3 unittest test case execution s

'''

1 Execution sequence with ASCII. 0~9,A~Z,a~z

2 use the function that suite to assign execution sequence

as follow:

    suite=unittest.TestSuite()

    suite.addTest(TestAdd('test_add1'))  #first

    suite.addTest(TestAdd('test_add2'))  #second

    suite.addTest(TestSub('test_asb1'))  #thirdly

    suite.addTest(TestSub('test_sub2'))  #fourthly

    # operational the test set

    runner=unittest.TextTestRunner()

    runner.run(suite)

'''