Python-unittest (3)

Source: Internet
Author: User
Tags roman numeral converter python docstring

Running Test cases from the command line with increased verbosity.
It is easy to adjust the test runner to print out every test method as it is run.
1. Create a new file called recipe3.py in which to store this recipe's code.

2. Pick a class to test. In this case, we will use our Roman numeral converter:

3. Create a test class using the same name as the class under test with test appended
To the end.

4. Create several test methods. For this recipe, the tests have been deliberately
Coded to fail.

5. Define a test suite that automatically loads all the test methods, and then runs
Them with a higher level of verbosity.
If _ name _ = "_ main __":
Suite = unittest. testloader (). loadtestsfromtestcase (\
Romannumeralconvertertest)
Unittest. texttestrunner (verbosity = 2). Run (suite)

6. Run the file from the command line. Notice how the test method that fails
Prints out its Python docstring:

Test code:

Code# !usr/bin/env python 2.7# coding: utf-8# filename: recipe3.pyclass RomanNumeralConverter(object):    def __init__(self, roman_numeral):        self.roman_numeral = roman_numeral        self.digit_map = {"M":1000, "D":500, "C":100, "L":50, "X":10, "V":5, "I":1}    def convert_to_decimal(self):        val = 0        for char in self.roman_numeral:            val += self.digit_map[char]        return valimport unittestclass RomanNumeralConverterTest(unittest.TestCase):    def test_parsing_millenia(self):        value = RomanNumeralConverter("M")        self.assertEquals(1000, value.convert_to_decimal())    def test_parsing_century(self):        value = RomanNumeralConverter("C")        self.assertEquals(10, value.convert_to_decimal(), "This test method is coded to fail for demo.")if __name__ == "__main__":    suite = unittest.TestLoader().loadTestsFromTestCase( \                                 RomanNumeralConverterTest)    unittest.TextTestRunner(verbosity=2).run(suite)

 

Output result:

Test_parsing_century (_ main _. romannumeralconvertertest)... fail
Test_parsing_millenia (_ main _. romannumeralconvertertest)... OK

========================================================== ====================================
Fail: test_parsing_century (_ main _. romannumeralconvertertest)
----------------------------------------------------------------------
Traceback (most recent call last ):
File "E: \ study \ Python \ 4668_code \ Chapter 1 \ 01 \ recipe3.py", line 25, in test_parsing_century
Self. assertequals (10, value. convert_to_decimal (), "This test method is coded to fail for demo .")
Assertionerror: This test method is coded to fail for demo.

----------------------------------------------------------------------
Ran 2 tests in 0.000 s

Failed (failures = 1)

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.