unittest assertRises question

[Leazen]

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  I'm using unittest and have a problem when trying to raise an
exception when creating an object.
  What I understood from the traceback is that I should be giving one
more parameter in the last argument of assertRaises. Is it asking for
self? I don't get it. Could anyone please explain what's going on?


The following bit of code:

    def testPriorities(self):
        """Priorities should be [0,2]."""
        for i in range(-10, 0) + range(3, 10):
            self.assertRaises(log.InvalidPriority, log.LogEvent, (i,
self.msg))


produces the following error:

======================================================================
ERROR: Priorities should be [0,2].
- ----------------------------------------------------------------------
Traceback (most recent call last):
  File "E:\Trabajos\Sesamo\Admin-v4.0.0\logtest.py", line 25, in
testPriorities
    self.assertRaises(log.InvalidPriority, log.LogEvent, (i, self.msg))
  File "C:\Python22\lib\unittest.py", line 273, in failUnlessRaises
    apply(callableObj, args, kwargs)
TypeError: __init__() takes at least 3 arguments (2 given)


LogEvent is:

class LogEvent:
    def __init__(self, priority, msg, eventTime = None):
        self.priority = priority
        self.message = msg
        if eventTime is None:
            import time
            self.time = time.time()
        elif 0.0 <= eventTime:
            self.time = eventTime
        else:
            raise InvalidTime, "The given time was invalid."


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