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Viewing changes to tests/helpers.py

  • Committer: Gustavo Niemeyer
  • Date: 2006-05-13 04:42:42 UTC
  • Revision ID: gustavo@niemeyer.net-20060513044242-39457d29f0849be3
Adding initial infrastructure.

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tests/helpers.py
 
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from cStringIO import StringIO
 
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import unittest
 
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import tempfile
 
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import logging
 
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import shutil
 
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import sys
 
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class TestHelper(unittest.TestCase):
 
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    helpers = []
 
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    def setUp(self):
 
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        self._helper_instances = []
 
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        for helper_factory in self.helpers:
 
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            helper = helper_factory()
 
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            helper.set_up(self)
 
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            self._helper_instances.append(helper)
 
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    def tearDown(self):
 
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        for helper in reversed(self._helper_instances):
 
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            helper.tear_down(self)
 
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class MakePath(object):
 
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    def set_up(self, test_case):
 
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        self.dirname = tempfile.mkdtemp()
 
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        self.dirs = []
 
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        self.counter = 0
 
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        test_case.make_dir = self.make_dir
 
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        test_case.make_path = self.make_path
 
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    def tear_down(self, test_case):
 
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        shutil.rmtree(self.dirname)
 
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        [shutil.rmtree(dir) for dir in self.dirs]
 
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    def make_dir(self):
 
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        path = tempfile.mkdtemp()
 
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        self.dirs.append(path)
 
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        return path
 
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    def make_path(self, content=None, path=None):
 
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        if path is None:
 
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            self.counter += 1
 
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            path = "%s/%03d" % (self.dirname, self.counter)
 
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        if content is not None:
 
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            file = open(path, "w")
 
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            try:
 
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                file.write(content)
 
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            finally:
 
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                file.close()
 
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        return path
 
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class LogKeeper(object):
 
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    """Record logging information.
 
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    Puts a 'logfile' attribute on your test case, which is a StringIO
 
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    containing all log output.
 
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    """
 
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    def set_up(self, test_case):
 
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        logger = logging.getLogger()
 
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        test_case.logfile = StringIO()
 
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        handler = logging.StreamHandler(test_case.logfile)
 
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        self.old_handlers = logger.handlers
 
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        # Sanity check; this might not be 100% what we want
 
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        if self.old_handlers:
 
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            test_case.assertEquals(len(self.old_handlers), 1)
 
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            test_case.assertEquals(self.old_handlers[0].stream, sys.stderr)
 
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        logger.handlers = [handler]
 
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    def tear_down(self, test_case):
 
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        logging.getLogger().handlers = self.old_handlers