# Copyright (c) 2012, Google Inc. All rights reserved.
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# in the documentation and/or other materials provided with the
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import logging
import xml.dom.minidom

_log = logging.getLogger(__name__)


class UnitTestResults(object):
    @classmethod
    def results_from_string(self, string):
        if not string:
            return None
        try:
            dom = xml.dom.minidom.parseString(string)
            failures = []
            for testcase in dom.getElementsByTagName('testcase'):
                if testcase.getElementsByTagName('failure').length != 0:
                    testname = testcase.getAttribute('name')
                    classname = testcase.getAttribute('classname')
                    failures.append("%s.%s" % (classname, testname))
            return failures
        except xml.parsers.expat.ExpatError, e:
            _log.error("XML error %s parsing unit test output" % str(e))
            return None