EE308_LAB11

[Wei_Liu_19103832]

The Link Your Class	https://bbs.csdn.net/forums/MUEE308FZ
The Link of Requirement of This Assignment	https://bbs.csdn.net/topics/603748107
The Aim of This Assignment	Unittest for python
MU STU ID and FZU STU ID	19103832_831901226

Aim

This aim is ain to be familiar with Junit Test or Unittest and the usage of these tools.Such as ‘assert, suite, timeout’, check problems for detail. I choose python with the toolbox called unittest which is already inside python.

Task

1. unittest assert test

import unittest,random
 
# Test Class
class MyClass(object):
 
    @classmethod
    def sum(self, a, b):
        return a + b
 
    @classmethod
    def div(self, a, b):
        return a / b
 
    @classmethod
def retrun_None(self):
            return None
# Unit Test Class
class MyTest (unittest.TestCase):
    # assertEqual()
    def test_assertEqual(self):
        # test if a+b equals sum or not
        try:
            a, b = 1, 2
            sum = 3
            self.assertEqual(a + b, sum, 'assert failed!，%s + %s != %s' %(a, b, sum))
        except AssertionError as e:
            print (e)
 
    # assertNotEqual()
    def test_assertNotEqual(self):
        # test if b-a equals res or not
        try:
            a, b = 4, 2
            res = 2
            self.assertEqual(b - a, res, 'assert failed!，%s - %s != %s' %(a, b, res)) 
        except AssertionError as e:
            print (e)
            
            
            # assertTrue()
    def test_assertTrue(self):
        
        try:
            self.assertTrue(1 == 1, "False expression")
        except AssertionError as e:
            print (e)
 
    # assertFalse()
    def test_assertFalse(self):
        # fix missing codes below ‘try’, only a line of codes needed
        try:
            self.assertFalse(1 != 1, "False expression")
        except AssertionError as e:
            print (e)
 
    # assertIs()
    def test_assertIs(self):
        # test a and b are totally same
        try:
            a = 12
            b = a
            self.assertIs(a, b, "%s and %s are not same" %(a, b))
        except AssertionError as e:
            print (e)
# assertIsInstance()
    def test_assertIsInstance(self):
        # fix missing codes below ‘y=object’ to test type(x) != y, only a line of codes needed
        try:
            x = MyClass
            y = object
            self.assertIsInstance(y, x, "False expression")
        except AssertionError as e:
            print (e)
 
if __name__ == '__main__':
    # run unittest
    unittest.main()

2. unittest test groups

Calc.py

class Calc(object):
 
    def add(self, *d):
        #
        result = 0
        for i in d:
            result += i
        return result
 
    def mul(self, *d):
        #
        result = 1
        for i in d:
            result = result * i
        return result
 
    def sub(self, a, *d):
        #
        result = a
        for i in d:
            result = result - i
        return result
 
 
    def div(self, a, *d):
        #
        result = a
        for i in d:
            result = result / i
        return result

TestCalc.py

import unittest
import random
from Calc import Calc
 
class TestCalcFunctions(unittest.TestCase):
 
    def setUp(self):
        self.c = Calc()
        print("setup completed!")
 
    def test_sum(self):
        self.assertTrue(self.c.add(1, 2, 3, 4) == 10)
 
    def test_sub(self):
        self.assertTrue(self.c.sub(9, 5) == 4)
        # fix a line of codes to test c.sub(self, a, *b) method
 
    def test_mul(self):
        self.assertTrue(self.c.mul(2, 4) == 8)
        # fix a line of codes to test c.mul(self, *b) method
 
    def test_div(self):
        self.assertTrue(self.c.div(4, 2) == 2)
        # fix a line of codes to test c.div(self, a, *b) method
 
    def tearDown(self):
        print("test completed!")
 
    def tearDown(self):
        print("tearDown completed")
 
if __name__ == '__main__':
    unittest.main()

unittest_suite.py

import random
import unittest
from TestCalc import TestCalcFunctions
 
 
class TestSequenceFunctions(unittest.TestCase):
    def setUp(self):
        self.seq = list(range(10))
 
    def tearDown(self):
        pass
 
    def test_choice(self):
        # chose an element from seq randomly
        element = random.choice(self.seq)
        # check element is truly in the sequence
        self.assertTrue(element in self.seq)
 
    def test_sample(self):
        # if codes raise exception
        with self.assertRaises(ValueError):
            random.sample(self.seq, 20)
 
        for element in random.sample(self.seq, 5):
            self.assertTrue(element in self.seq)
 
class TestDictValueFormatFunctions(unittest.TestCase):
    def setUp(self):
        self.seq = list(range(10))
 
    def tearDown(self):
        pass
 
    def test_shuffle(self):
        # shuffle sequence
        random.shuffle(self.seq)
        self.seq.sort()
        self.assertEqual(self.seq, list(range(10)))
        # check TypeError exception
        self.assertRaises(TypeError, random.shuffle, (1, 2, 3))
        
if __name__ == '__main__':
    # get all test methods start with ‘test’ and return a suite
    suite1 = unittest.TestLoader().loadTestsFromTestCase(TestSequenceFunctions)
    # please fix another two suite, suite2 of TestCalcFunctions and suite3 of TestDictValueFormatFunctions
    suite2 = unittest.TestLoader().loadTestsFromTestCase(TestCalcFunctions)
    suite3 = unittest.TestLoader().loadTestsFromTestCase(TestDictValueFormatFunctions)
 
# put more test class into suite
# you can change suites’ order, like [suite1, suite2, suite3]
    suite = unittest.TestSuite([suite2, suite1,suite3])      
    # set verbosity = 2 you could get more detailed information
unittest.TextTestRunner(verbosity = 2).run(suite)

3.unittest skip test

#encoding=utf-8
 
import random,sys,unittest
 
class TestSeqFunctions(unittest.TestCase):
 
      a = 1
      def setUp(self):
            self.seq = list(range(20)) 
 
      @unittest.skip("skipping") # skip this method anyway
      def test_shuffle(self):
            random.shuffle(self.seq)
            self.seq.sort()
            self.assertEqual(self.seq,list(range(20)))
            self.assertRaises(TypeError,random.shuffle,(1,2,3))
 
      @unittest.skipIf(a > 5, "skipping") # skip this method anyway
      def test_choice(self):
            element = random.choice(self.seq)
            self.assertTrue(element in self.seq)
 
      @unittest.skipUnless(sys.platform.startswith("linux"))# add a line of annotation that skip if not in linux platform
      def test_sample(self):
            with self.assertRaises(ValueError):
                  random.sample(self.seq, 20)
            for element in random.sample(self.seq, 5):
                  self.assertTrue(element in self.seq)
 
if __name__=="__main__":
    # unittest.main()
    suite = unittest.TestLoader().loadTestsFromTestCase(TestSeqFunctions)
    suite = unittest.TestSuite(suite)
unittest.TextTestRunner(verbosity = 2).run(suite)

4.unittest Run test under numerical order or alpha order

# encoding=utf-8
 
import unittest
from Calc import Calc
 
 
class MyTest(unittest.TestCase):
    @classmethod
    def setUpClass(self):
        print("init Calc before unittest")
        self.c = Calc()
 
    # rename the four methods bellow, make sure print queue will be :
 
    # P.S.: test case must starts with ‘test’
    def test_add(self):
        print("run add()")
        self.assertEqual(self.c.add(1, 2, 3), 7, 'test add fail')
 
    def test_sub(self):
        print("run sub()")
        self.assertEqual(self.c.sub(2, 1, 2), -1, 'test sub fail')
 
    def test_mul(self):
        print("run mul()")
        self.assertEqual(Calc.mul(1, 2, 3, 4), 24, 'test mul fail')
 
    def test_div(self):
        print("run div()")
        self.assertEqual(Calc.div(1, 8, 2, 4), 1, 'test div fail')
 
 
if __name__ == '__main__':
    unittest.main()

5.unittest Time Test

import time, unittest, sys, time
import timeout_decorator
 
 
class timeoutTest(unittest.TestCase):
 
    # set a time decorator(annotation) which will be triggered after 5s’ running
    @timeout_decorator.timeout(5)
    def testtimeout(self):
        print("Start")
        for i in range(1, 10):
            time.sleep(1)
            print("%d seconds have passed" % i)
 
 
if __name__ == "__main__":
    unittest.main()

Conclusion

In this lab I learned how to test Python code. Unit test can save a lot of time for us, it is very useful for use to test in our projects.