pythonunittest(5)

执行多个测试套件（suites)

Chaining together a suite of tests

Unittest makes it easy to chain together test cases into a TestSuite. A TestSuite can be run
just like a TestCase, but it also provides additional functionality to add a single test, multiple
tests, and count them.

1. Create a new file named recipe5.py in which to put our sample application and
test cases.

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

3. Create two test classes with various test methods spread between them.

4. Create a test runner in a separate file named recipe5_runner.py that pulls in
both test cases.

5. Execute the test runner, and observe how tests are pulled in from both test cases.

测试代码：

# !usr/bin/env python 2.7
# coding: utf-8
# filename: recipe5.py

class RomanNumeralConverter(object):
    def __init__(self):
        self.digit_map = {"M":1000, "D":500, "C":100, "L":50, "X":10, "V":5, "I":1}

    def convert_to_decimal(self, roman_numeral):
        val = 0
        for char in roman_numeral:
            val += self.digit_map[char]
        return val

import unittest

class RomanNumeralConverterTest(unittest.TestCase):
    def setUp(self):
        self.cvt = RomanNumeralConverter()

    def test_parsing_millenia(self):
        self.assertEquals(1000, \
                          self.cvt.convert_to_decimal("M"))

    def test_parsing_century(self):
        self.assertEquals(100, \
                          self.cvt.convert_to_decimal("C"))


class RomanNumeralComboTest(unittest.TestCase):
    def setUp(self):
        self.cvt = RomanNumeralConverter()

    def test_multi_millenia(self):
        self.assertEquals(4000, \
                          self.cvt.convert_to_decimal("MMMM"))

    def test_multi_add_up(self):
        self.assertEquals(2010, \
                          self.cvt.convert_to_decimal("MMX"))

# !usr/bin/env python 2.7
# coding: utf-8
# filename: recipe5_runner.py

if __name__ == "__main__":
    import unittest
    from recipe5 import *

    suite1 = unittest.TestLoader().loadTestsFromTestCase( \
                                 RomanNumeralConverterTest)
    suite2 = unittest.TestLoader().loadTestsFromTestCase( \
                                 RomanNumeralComboTest)
    suite = unittest.TestSuite([suite1, suite2])
    unittest.TextTestRunner(verbosity=2).run(suite)

运行结果：

test_parsing_century (recipe5.RomanNumeralConverterTest) ... ok
test_parsing_millenia (recipe5.RomanNumeralConverterTest) ... ok
test_multi_add_up (recipe5.RomanNumeralComboTest) ... ok
test_multi_millenia (recipe5.RomanNumeralComboTest) ... ok

----------------------------------------------------------------------
Ran 4 tests in 0.001s

OK