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"""Implementation of the parametric test support for Python 2.x
"""
#-----------------------------------------------------------------------------
# Copyright (C) 2009-2011 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
import sys
import unittest
from compiler.consts import CO_GENERATOR
#-----------------------------------------------------------------------------
# Classes and functions
#-----------------------------------------------------------------------------
def isgenerator(func):
try:
return func.func_code.co_flags & CO_GENERATOR != 0
except AttributeError:
return False
class ParametricTestCase(unittest.TestCase):
"""Write parametric tests in normal unittest testcase form.
Limitations: the last iteration misses printing out a newline when running
in verbose mode.
"""
def run_parametric(self, result, testMethod):
# But if we have a test generator, we iterate it ourselves
testgen = testMethod()
while True:
try:
# Initialize test
result.startTest(self)
# SetUp
try:
self.setUp()
except KeyboardInterrupt:
raise
except:
result.addError(self, sys.exc_info())
return
# Test execution
ok = False
try:
testgen.next()
ok = True
except StopIteration:
# We stop the loop
break
except self.failureException:
result.addFailure(self, sys.exc_info())
except KeyboardInterrupt:
raise
except:
result.addError(self, sys.exc_info())
# TearDown
try:
self.tearDown()
except KeyboardInterrupt:
raise
except:
result.addError(self, sys.exc_info())
ok = False
if ok: result.addSuccess(self)
finally:
result.stopTest(self)
def run(self, result=None):
if result is None:
result = self.defaultTestResult()
testMethod = getattr(self, self._testMethodName)
# For normal tests, we just call the base class and return that
if isgenerator(testMethod):
return self.run_parametric(result, testMethod)
else:
return super(ParametricTestCase, self).run(result)
def parametric(func):
"""Decorator to make a simple function into a normal test via unittest."""
class Tester(ParametricTestCase):
test = staticmethod(func)
Tester.__name__ = func.__name__
return Tester
|
