unittest ValueError

[Chris Fonnesbeck]

I have built the following unit test, observing the examples laid out
in the python docs:

class testMCMC(unittest.TestCase):

    def setUp(self):

        # Create an instance of the sampler
        self.sampler = DisasterSampler()

    def testCoalMiningDisasters(self):
        """Run coal mining disasters example sampler"""

        print 'Running coal mining disasters test case ...'

        # Specify the nimber of iterations to execute
        iterations = 10000
        thin = 2
        burn = 5000
        chains = 2

        # Run MCMC simulation
        for i in range(chains):

            self.failUnless(self.sampler.sample(iterations, burn=burn,
thin=thin, plot=True))

            # Run convergence diagnostics
            self.sampler.convergence()

            # Plot autocorrelation
            self.sampler.autocorrelation()

        # Goodness of fit
        self.failIf(self.sampler.goodness(iterations/10)['overall'] < 0.05)


def test():
    # Run unit tests
    unittest.main()

However, when I run test() from the python shell, it dies:

In [2]: test()

----------------------------------------------------------------------
Ran 0 tests in 0.000s

OK
---------------------------------------------------------------------------
exceptions.SystemExit                                Traceback (most
recent call last)

/Users/chris/<ipython console>

/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site-packages/PyMC/MCMC.py
in test()
   2986
   2987 def test():
   2988     # Run unit tests
-> 2989     unittest.main()
        global unittest.main = <class 'unittest.TestProgram'>
   2990

/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/unittest.py
in __init__(self=<unittest.TestProgram object at 0x10e6c10>,
module='__main__', defaultTest=None, argv=['/usr/local/bin/ipython'],
testRunner=None, testLoader=<unittest.TestLoader object at 0x5feb30>)
    757         self.progName = os.path.basename(argv[0])
    758         self.parseArgs(argv)
--> 759         self.runTests()
        self.runTests = <bound method TestProgram.runTests of
<unittest.TestProgram object at 0x10e6c10>>
    760
    761     def usageExit(self, msg=None):

/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/unittest.py
in runTests(self=<unittest.TestProgram object at 0x10e6c10>)
    795             self.testRunner = TextTestRunner(verbosity=self.verbosity)
    796         result = self.testRunner.run(self.test)
--> 797         sys.exit(not result.wasSuccessful())
        global sys.exit = <built-in function exit>
        result.wasSuccessful = <bound method
_TextTestResult.wasSuccessful of <unittest._TextTestResult run=0
errors=0 failures=0>>
    798
    799 main = TestProgram

SystemExit: False
Type exit or quit to exit IPython (%Exit or %Quit do so unconditionally).

In [3]: from PyMC import testMCMC

In [4]: foo = testMCMC()
---------------------------------------------------------------------------
exceptions.ValueError                                Traceback (most
recent call last)

/Users/chris/<ipython console>

/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/unittest.py
in __init__(self=<PyMC.MCMC.testMCMC testMethod=runTest>,
methodName='runTest')
    206             self.__testMethodDoc = testMethod.__doc__
    207         except AttributeError:
--> 208             raise ValueError, "no such test method in %s: %s" % \
        global ValueError = undefined
        self.__class__ = <class 'PyMC.MCMC.testMCMC'>
        methodName = 'runTest'
    209                   (self.__class__, methodName)
    210

ValueError: no such test method in <class 'PyMC.MCMC.testMCMC'>: runTest


I have no idea why this is happening. My TestCase class begins with
"test", the method begins with "test", yet no tests are seen. Also, I
do not get the runTest ValueError. I assumed that you get this method
for free win TestCase. The examples certainly do not have this method,
so I am not sure what the problem is.

Thanks for any help,
-- 
Chris Fonnesbeck + Atlanta, GA + http://trichech.us