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Test Driven Development in Python
Test Driven Development in Python
Test Driven Development in Python
Test Driven Development in Python
Test Driven Development in Python
Test Driven Development in Python
Test Driven Development in Python
Test Driven Development in Python
Test Driven Development in Python
Test Driven Development in Python
Test Driven Development in Python
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Test Driven Development in Python

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  • 1. Test Driven Development in Python Anoop Thomas Mathew Agiliq Info Solutions Pvt. Ltd.
  • 2. Overview● About TDD● TDD and Python● unittests● Developing with Tests● Concluding Remarks● Open Discussion
  • 3. “ Walking on water and developing software from a specification are easy if both are frozen. ” - Edward V Berard
  • 4. About Test Driven Development (TDD)● Write tests for the use case● Run it (make sure it fails and fails miserably)● Write code and implement the required functionality with relevant level of detail● Run the test● Write test for addition features● Run all test● Watch it succeed. Have a cup of coffee !
  • 5. Advantages of TDD● application is determined by using it● written minimal amount of application code – total application + tests is probably more – objects: simpler, stand-alone, minimal dependencies● tends to result in extensible architectures● instant feedback
  • 6. Unittestimport unittestclass MyTest(unittest.TestCase): def testMethod(self): self.assertEqual(1 + 2, 3, "1 + 2 !=3")if __name__ == __main__: unittest.main()
  • 7. import unittestfrom demo import Greater The Testclass DemoTest(unittest.TestCase): def test_number(self): comparator = Greater() result = comparator.greater(10,5) self.assertTrue(result) def test_char(self): comparator = Greater() result = comparator.greater(abcxyz, AB) self.assertTrue(result) def test_char_equal(self): comparator = Greater() result = comparator.greater(4, 3) self.assertTrue(result)if __name__ == __main__: unittest.main()
  • 8. class Greater(object): The Program def greater(self, val1, val2): if type(val1) ==str or type(val2) == str: val1 = str(val1) val2 = str(val2) sum1 = sum([ord(i) for i in val1]) sum2 = sum([ord(i) for i in val2]) if sum1 > sum2: return True else: return False if val1>val2: return True else: return False
  • 9. Test Again1. Add new test for features/bugs2. Resolve the issue, make the test succeed.3. Iterate from Step 1
  • 10. Beware!!!Murphy is everywhere.
  • 11. Lets Discuss

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