[Python2.7] Summary of how to use unittest

manual

25.3. Unittest — Unittest Framework — Python 2.7.x Documentation

template

Some people have already created a template, so I think you should refer to the following. python unittest template-Qiita

The following is an example of a minimum configuration test.

Minimum configuration test example

import unittest

class UnitTest(unittest.TestCase):
    def test1(self):
        self.assertEqual(1, 1)

if __name__ == '__main__':
    unittest.main()

Execution example

.
----------------------------------------------------------------------
Ran 1 test in 0.000s

OK

※important point The test to be executed must start with test in the method name.

assert method

Please refer to the following for details. There are many others. 25.3. Unittest — Unittest Framework — Python 2.7.x Documentation-

Executes specific processing at initialization / termination

At initialization / termination of the entire Test

Executed when the entire Test is initialized

def setUpModule():
    pass

Run at the end of the entire Test

def tearDownModule():
    pass

TestCase initialization / termination

Executed at test case initialization

class HogeTest(unittest.TestCase):
#...
    @classmethod
    def setUpClass(cls):
        pass

Execute at the end of TestCase

class HogeTest(unittest.TestCase):
#...
    @classmethod
    def tearDownClass(cls):
        pass

Test Fixture (Each test in TastCase) At initialization / end

Executed at test case initialization

class HogeTest(unittest.TestCase):
#...
    def setUp(self):
        pass

Execute at the end of TestCase

class HogeTest(unittest.TestCase):
#...
    def tearDown(self):
        pass

Execution order

Here is the log when the following test is executed.

Execution order confirmation sample of each function (excerpt)

def setUpModule():
    print '## setUpModule!'

def tearDownModule():
    print '## tearDownModule!'
    print unittest.TestResult

class HogeTest(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        print '## setUpClass!'
        pass

    @classmethod
    def tearDownClass(cls):
        print '## tearDownClass!'

    def setUp(self):
        print '## setUp!'

    def tearDown(self):
        print '## tearDown!'

    def test1(self):
        expected = 1
        actual = 1
        self.assertEqual(expected, actual)

Execution result

.....
----------------------------------------------------------------------
Ran 1 tests in 0.000s

OK
## setUpModule!
## setUpClass!
## setUp!
## tearDown!
## tearDownClass!
## tearDownModule!

Get test results

You can get it with TestResult class. In the frequently used ʻunittest.main () `, implement as follows.

unittest.main()When getting in

def main()
    #By default sys.exit()Will be called, so exit=Specify False
    test_program = unittest.main(exit=False)
    test_result = test_program.result

Please refer to the following for the contents that can be obtained by TestResult.

25.3. Unittest — Unit test framework — Python 2.7.x documentation

Get the execution time of each test as a variable

python - How to know time spent on each test when using unittest? - Stack Overflow

reference

python unittest template-Qiita Library: unittest --Life with Python python - Unittest causing sys.exit() - Stack Overflow When writing a test with python unittest, use doCleanups for setUp that may fail --Qiita