File: test

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#!/usr/bin/env python
#
# Copyright (c) 2006, 2007 Canonical
#
# Written by Gustavo Niemeyer <gustavo@niemeyer.net>
#
# This file is part of Storm Object Relational Mapper.
#
# Storm is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation; either version 2.1 of
# the License, or (at your option) any later version.
#
# Storm is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
import optparse
import unittest
import doctest
import sys
import os

import tests


def find_tests(testpaths=()):
    """Find all test paths, or test paths contained in the provided sequence.

    @param testpaths: If provided, only tests in the given sequence will
                      be considered.  If not provided, all tests are
                      considered.
    @return: a test suite containing the requested tests.
    """
    suite = unittest.TestSuite()
    topdir = os.path.abspath(os.path.dirname(__file__))
    testdir = os.path.dirname(tests.__file__)
    testpaths = set(testpaths)
    for root, dirnames, filenames in os.walk(testdir):
        for filename in filenames:
            filepath = os.path.join(root, filename)
            relpath = filepath[len(topdir)+1:]

            if (filename == "__init__.py" or filename.endswith(".pyc") or
                relpath == os.path.join("tests", "conftest.py")):
                # Skip non-tests.
                continue

            if testpaths:
                # Skip any tests not in testpaths.
                for testpath in testpaths:
                    if relpath.startswith(testpath):
                        break
                else:
                    continue

            if filename.endswith(".py"):
                modpath = relpath.replace(os.path.sep, ".")[:-3]
                module = __import__(modpath, None, None, [""])
                suite.addTest(
                    unittest.defaultTestLoader.loadTestsFromModule(module))
            elif filename.endswith(".txt"):
                load_test = True
                if relpath == os.path.join("tests", "zope", "README.txt"):
                    # Special case the inclusion of the Zope-dependent
                    # ZStorm doctest.
                    import tests.zope as ztest
                    load_test = (
                        ztest.has_transaction and
                        ztest.has_zope_component and
                        ztest.has_zope_security)
                if load_test:
                    parent_path = os.path.dirname(relpath).replace(
                        os.path.sep, ".")
                    parent_module = __import__(parent_path, None, None, [""])
                    suite.addTest(doctest.DocFileSuite(
                            os.path.basename(relpath),
                            module_relative=True,
                            package=parent_module,
                            optionflags=doctest.ELLIPSIS))

    return suite


def parse_sys_argv():
    """Extract any arguments not starting with '-' from sys.argv."""
    testpaths = []
    for i in range(len(sys.argv)-1,0,-1):
        arg = sys.argv[i]
        if not arg.startswith("-"):
            testpaths.append(arg)
            del sys.argv[i]
    return testpaths

def test_with_runner(runner):
    usage = "test.py [options] [<test filename>, ...]"

    parser = optparse.OptionParser(usage=usage)

    parser.add_option('--verbose', action='store_true')
    opts, args = parser.parse_args()

    if opts.verbose:
        runner.verbosity = 2

    suite = find_tests(args)
    result = runner.run(suite)
    return not result.wasSuccessful()


def test_with_trial():
    from twisted.trial.reporter import TreeReporter
    from twisted.trial.runner import TrialRunner
    runner = TrialRunner(reporterFactory=TreeReporter, realTimeErrors=True)
    return test_with_runner(runner)


def test_with_unittest():
    runner = unittest.TextTestRunner()
    return test_with_runner(runner)


if __name__ == "__main__":
    runner = os.environ.get("STORM_TEST_RUNNER")
    if not runner:
        runner = "unittest"
    runner_func = globals().get("test_with_%s" % runner.replace(".", "_"))
    if not runner_func:
        sys.exit("Test runner not found: %s" % runner)
    sys.exit(runner_func())

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