setUpfunction gets called every time you need to run a single TestCase (no matter if you run it using
So if you have to test something that requires a complex setUp routine (like loading 50000 records from SQL or preparing an orangemochafrappuccino) but that can be reused all along your TestSuite you have the same problem I had.
Now all around the internet there are posts saying "You could do that" or "One way to do that" or "Once I did that like this..." or even worse "The standard way of doing it is...".
But none of these posts really gets to the bottom of it, they all give you a piece of information. I couldn't find one place that told you "copy/paste this code and be happy".
So, after figuring it out, I can now tell you "copy/paste this code and be happy".
import unittest from my_program import MyClass class MyClassTest(unittest.TestCase): # First define a class variable that determines # if setUp was ever run ClassIsSetup = False def setUp(self): # If it was not setup yet, do it if not self.ClassIsSetup: print "Initializing testing environment" # run the real setup self.setupClass() # remember that it was setup already self.__class__.ClassIsSetup = True def setupClass(self): # Do the real setup unittest.TestCase.setUp(self) # you want to have persistent things to test self.__class__.myclass = MyClass() # (you can call this later with self.myclass)
You can do the same for the
unittest.tearDownsince it is exactly the same code.