I am rapid prototyping so for now I would like to write unit tests together with the code I am testing - rather than putting the tests in a separate file. However, I would only like to build the test an invoke them if we run the code in the containing file as main. As follows:
class MyClass:
def __init(self)__:
# do init stuff here
def myclassFunction():
# do something
if __name__ == '__main__':
import unittest
class TestMyClass(unittest.TestCase):
def test_one(self):
# test myclassFunction()
suite = unittest.TestLoader().loadTestsFromTestCase(TestMyClass)
unittest.TextTestRunner(verbosity=2).run(suite)
This of course doesn't run as unittest is unable to find or make use of the test class, TestMyClass. Is there a way to get this arrangement to work or do I have to pull everything out of the if __name__ == '__main__' scope except the invocation to unittest?
Thanks!
If you move your TestMyClass above of if __name__ == '__main__'
you will get exactly what you want:
Tests will run only when file executed as main
Something like this
import unittest
class MyClass:
def __init(self)__:
# do init stuff here
def myclassFunction():
# do something
class TestMyClass(unittest.TestCase):
def test_one(self):
if __name__ == '__main__':
unittest.main()
Related
I would like to ensure with tests that:
- the application cannot be imported
- the application can be started as a real application (i.e: python src.py)
I'm interested about that, why the following is not working:
src.py
class A:
def x(self):
print('this is x')
if __name__ == '__main__':
A().x()
test.py (snippet)
class Test(unittest.TestCase):
#mock.patch('src.A.x')
def test_main(self, mock_x):
import src
mock_x.assert_any_call()
This test fails... why?
Because the name of the module when imported is src, not __main__.
The easiest solution would be to move that code into a function:
def main():
A().x()
if __name__ == '__main__':
main()
and in your test, you would invoke src.main()
#mock.patch('src.A.x')
def test_main(self, mock_x):
import src
src.main()
mock_x.assert_any_call()
To test that a module is not importable you do not need to use mocks.
See assertRaises.
Just check if an error is thrown on import od module.
with self.assertRaises(...):
...
I'm trying to run a TestCase in python 3.3.2 that has several test methods in it:
class ttt(unittest.TestCase):
def setUp(self):
...
def tearDown(self):
...
def test_test1(self):
...
def test_test2(self):
...
if __name__ == "__main__":
instance = ttt()
instance.run()
The documentation states the following:
Each instance of TestCase will run a single base method: the method
named methodName. However, the standard implementation of the default
methodName, runTest(), will run every method starting with test as an
individual test, and count successes and failures accordingly.
Therefore, in most uses of TestCase, you will neither change the
methodName nor reimplement the default runTest() method.
However, when I run the code I get the following:
'ttt' object has no attribute 'runTest'
I want to ask: Is this a bug? And if it's not why is there no runTest method? Am I doing something wrong?
When the unit test framework runs test cases, it creates an instance of the test class for each test.
I.e. to simulate what the unit test framework does you need to do:
if __name__ == "__main__":
for testname in ["test_test1", "test_test2"]:
instance = ttt(testname)
instance.run()
The correct way to run unit tests in a module is:
if __name__ == "__main__":
unittest.main()
... but I assume you know this already.
Regarding runTest: unittest.TestCase.__init__ signature and docstring is:
def __init__(self, methodName='runTest'):
"""Create an instance of the class that will use the named test
method when executed. Raises a ValueError if the instance does
not have a method with the specified name.
"""
Meaning that if you don't specify a test name in the constructor, the default is runTest.
I have two test cases (two different files) that I want to run together in a Test Suite. I can get the tests to run just by running python "normally" but when I select to run a python-unit test it says 0 tests run. Right now I'm just trying to get at least one test to run correectly.
import usertest
import configtest # first test
import unittest # second test
testSuite = unittest.TestSuite()
testResult = unittest.TestResult()
confTest = configtest.ConfigTestCase()
testSuite.addTest(configtest.suite())
test = testSuite.run(testResult)
print testResult.testsRun # prints 1 if run "normally"
Here's an example of my test case set up
class ConfigTestCase(unittest.TestCase):
def setUp(self):
##set up code
def runTest(self):
#runs test
def suite():
"""
Gather all the tests from this module in a test suite.
"""
test_suite = unittest.TestSuite()
test_suite.addTest(unittest.makeSuite(ConfigTestCase))
return test_suite
if __name__ == "__main__":
#So you can run tests from this module individually.
unittest.main()
What do I have to do to get this work correctly?
you want to use a testsuit. So you need not call unittest.main().
Use of testsuit should be like this:
#import usertest
#import configtest # first test
import unittest # second test
class ConfigTestCase(unittest.TestCase):
def setUp(self):
print 'stp'
##set up code
def runTest(self):
#runs test
print 'stp'
def suite():
"""
Gather all the tests from this module in a test suite.
"""
test_suite = unittest.TestSuite()
test_suite.addTest(unittest.makeSuite(ConfigTestCase))
return test_suite
mySuit=suite()
runner=unittest.TextTestRunner()
runner.run(mySuit)
All of the code to create a loader and suite is unnecessary. You should write your tests so that they are runnable via test discovery using your favorite test runner. That just means naming your methods in a standard way, putting them in an importable place (or passing a folder containing them to the runner), and inheriting from unittest.TestCase. After you've done that, you can use python -m unittest discover at the simplest, or a nicer third party runner to discover and then run your tests.
If you are trying to manually collect TestCases, this is useful: unittest.loader.findTestCases():
# Given a module, M, with tests:
mySuite = unittest.loader.findTestCases(M)
runner = unittest.TextTestRunner()
runner.run(mySuit)
I am assuming you are referring to running python-unit test against the module that consolidates the two test. It will work if you create test case for that module ie. subclassing unittest.TestCase and having a simple test that starts with the word 'test'.
e.g.
class testall(unittest.TestCase):
def test_all(self):
testSuite = unittest.TestSuite()
testResult = unittest.TestResult()
confTest = configtest.ConfigTestCase()
testSuite.addTest(configtest.suite())
test = testSuite.run(testResult)
print testResult.testsRun # prints 1 if run "normally"
if __name__ == "__main__":
unittest.main()
How do I run multiple Classes in a single test suite in Python using unit testing?
If you want to run all of the tests from a specific list of test classes, rather than all of the tests from all of the test classes in a module, you can use a TestLoader's loadTestsFromTestCase method to get a TestSuite of tests for each class, and then create a single combined TestSuite from a list containing all of those suites that you can use with run:
import unittest
# Some tests
class TestClassA(unittest.TestCase):
def testOne(self):
# test code
pass
class TestClassB(unittest.TestCase):
def testOne(self):
# test code
pass
class TestClassC(unittest.TestCase):
def testOne(self):
# test code
pass
def run_some_tests():
# Run only the tests in the specified classes
test_classes_to_run = [TestClassA, TestClassC]
loader = unittest.TestLoader()
suites_list = []
for test_class in test_classes_to_run:
suite = loader.loadTestsFromTestCase(test_class)
suites_list.append(suite)
big_suite = unittest.TestSuite(suites_list)
runner = unittest.TextTestRunner()
results = runner.run(big_suite)
# ...
if __name__ == '__main__':
run_some_tests()
I'm a bit unsure at what you're asking here, but if you want to know how to test multiple classes in the same suite, usually you just create multiple testclasses in the same python file and run them together:
import unittest
class TestSomeClass(unittest.TestCase):
def testStuff(self):
# your testcode here
pass
class TestSomeOtherClass(unittest.TestCase):
def testOtherStuff(self):
# testcode of second class here
pass
if __name__ == '__main__':
unittest.main()
And run with for example:
python mytestsuite.py
Better examples can be found in the official documention.
If on the other hand you want to run multiple test files, as detailed in "How to organize python test in a way that I can run all tests in a single command?", then the other answer is probably better.
The unittest.TestLoader.loadTestsFromModule() method will discover and load all classes in the specified module. So you can just do this:
import unittest
import sys
class T1(unittest.TestCase):
def test_A(self):
pass
def test_B(self):
pass
class T2(unittest.TestCase):
def test_A(self):
pass
def test_B(self):
pass
if __name__ == "__main__":
suite = unittest.TestLoader().loadTestsFromModule( sys.modules[__name__] )
unittest.TextTestRunner(verbosity=3).run( suite )
Normally you would do in the following way (which adds only one class per suite):
# Add tests.
alltests = unittest.TestSuite()
alltests.addTest(unittest.makeSuite(Test1))
alltests.addTest(unittest.makeSuite(Test2))
If you'd like to have multiple classes per suite, you can use add these tests in the following way:
for name in testnames:
suite.addTest(tc_class(name, cargs=args))
Here is same example to run all classes per separate suite you can define your own make_suite method:
# Credits: http://codereview.stackexchange.com/a/88662/15346
def make_suite(tc_class):
testloader = unittest.TestLoader()
testnames = testloader.getTestCaseNames(tc_class)
suite = unittest.TestSuite()
for name in testnames:
suite.addTest(tc_class(name, cargs=args))
return suite
# Add all tests.
alltests = unittest.TestSuite()
for name, obj in inspect.getmembers(sys.modules[__name__]):
if inspect.isclass(obj) and name.startswith("FooTest"):
alltests.addTest(make_suite(obj))
result = unittest.TextTestRunner(verbosity=2).run(alltests)
If above doesn't suite, you can convert above example into method which could accept multiple classes.
I've found nose to be a good tool for this. It discovers all unit tests in a directory structure and executes them.
I have a test suite to perform smoke tests. I have all my script stored in various classes but when I try and run the test suite I can't seem to get it working if it is in a class. The code is below: (a class to call the tests)
from alltests import SmokeTests
class CallTests(SmokeTests):
def integration(self):
self.suite()
if __name__ == '__main__':
run = CallTests()
run.integration()
And the test suite:
class SmokeTests():
def suite(self): #Function stores all the modules to be tested
modules_to_test = ('external_sanity', 'internal_sanity')
alltests = unittest.TestSuite()
for module in map(__import__, modules_to_test):
alltests.addTest(unittest.findTestCases(module))
return alltests
if __name__ == '__main__':
unittest.main(defaultTest='suite')
This output's an error:
Attribute Error: 'module' object has no attribute 'suite'
So I can see how to call a normal function defined but I'm finding it difficult calling in the suite. In one of the tests the suite is set up like so:
class InternalSanityTestSuite(unittest.TestSuite):
# Tests to be tested by test suite
def makeInternalSanityTestSuite():
suite = unittest.TestSuite()
suite.addTest(TestInternalSanity("BasicInternalSanity"))
suite.addTest(TestInternalSanity("VerifyInternalSanityTestFail"))
return suite
def suite():
return unittest.makeSuite(TestInternalSanity)
If I have someSuite() inside the class SmokeTests python cannot find the attribute suite but if I remove the class it work's. I run this as a script and call in variables into the tests. I do not want to have to run the tests by os.system('python tests.py'). I was hoping to call the tests through the class I have like any other function
Can anyone help me with getting this running?
Thanks for any help in advance.
I know this is not the answer, but I'd suggest using library that can use test discovery, like nose or unittest capability from Python 2.7+.
Possibility to do
nosetests module.submodule
or
nosetests module.submodule:TestCase.test_method
is priceless :)
This can't work:
class SmokeTests():
def suite(self): #Function stores all the modules to be tested
modules_to_test = ('external_sanity', 'internal_sanity')
alltests = unittest.TestSuite()
for module in map(__import__, modules_to_test):
alltests.addTest(unittest.findTestCases(module))
return alltests
if __name__ == '__main__':
unittest.main(defaultTest='suite')
This output's an error: Attribute Error: 'module' object has no attribute 'suite'.
Your suite the value of the SmokeTests().suite() method. Note a variable named suite, since you have no such variable.
It's easier to use a simple function for your suite.
def someSuite():
modules_to_test
...
return alltests
if __name__ == "__main__":
unittest.main( defaultTest= someSuite() )
Something like that would be closer to correct.