~launchpad-pqm/launchpad/devel

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# Copyright 2009-2010 Canonical Ltd.  This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).

"""
A standard test suite for Launchpad-derived code.

Assumes the following layout beneath base_dir:

 stories/ - Contains pagetests
 doc/ - Contains doctests
"""

__metaclass__ = type
__all__ = [
    'build_doctest_suite',
    'build_test_suite',
    ]

import doctest
import logging
import os
import unittest

from canonical.testing.layers import DatabaseFunctionalLayer
from lp.testing.pages import PageTestSuite
from lp.testing.systemdocs import (
    LayeredDocFileSuite,
    setUp,
    tearDown,
    )


def build_doctest_suite(base_dir, tests_path, special_tests={},
                        layer=DatabaseFunctionalLayer,
                        setUp=setUp, tearDown=tearDown,
                        package=None):
    """Build the doc test suite."""
    suite = unittest.TestSuite()
    # Tests are run relative to the calling module, not this module.
    if package is None:
        package = doctest._normalize_module(None)
    testsdir = os.path.abspath(
        os.path.normpath(os.path.join(base_dir, tests_path)))

    if os.path.exists(testsdir):
        # Add doctests using default setup/teardown.
        filenames = [filename
                     for filename in os.listdir(testsdir)
                     if (filename.endswith('.txt')
                         and filename not in special_tests)]
        # Sort the list to give a predictable order.
        filenames.sort()
        for filename in filenames:
            path = os.path.join(tests_path, filename)
            one_test = LayeredDocFileSuite(
                path, package=package, setUp=setUp, tearDown=tearDown,
                layer=layer, stdout_logging_level=logging.WARNING)
            suite.addTest(one_test)
    return suite


def build_test_suite(base_dir, special_tests={},
                     layer=DatabaseFunctionalLayer,
                     setUp=setUp, tearDown=tearDown):
    """Build a test suite from a directory containing test files.

    The parent's 'stories' subdirectory will be checked for pagetests and
    the parent's 'doc' subdirectory will be checked for doctests.

    :param base_dir: The tests subdirectory that.

    :param special_tests: A dict mapping filenames to TestSuite
        objects. These files need special treatment (for instance, they
        should be run in a different layer, or they need custom
        setup/teardown). The given TestSuite object will be used for that
        file, rather than a new one generated.

    :param layer: The layer in which to run the tests.
    """
    suite = unittest.TestSuite()

    # Tests are run relative to the calling module, not this module.
    package = doctest._normalize_module(None)

    # Add the pagetests.
    stories_dir = os.path.join(os.path.pardir, 'stories')
    stories_path = os.path.join(base_dir, stories_dir)
    if os.path.exists(stories_path):
        suite.addTest(PageTestSuite(stories_dir, package))
        for story_dir in os.listdir(stories_path):
            full_story_dir = os.path.join(stories_path, story_dir)
            if not os.path.isdir(full_story_dir):
                continue
            story_path = os.path.join(stories_dir, story_dir)
            suite.addTest(PageTestSuite(story_path, package))

    # Add the special doctests.
    for key in sorted(special_tests):
        special_suite = special_tests[key]
        suite.addTest(special_suite)

    tests_path = os.path.join(os.path.pardir, 'doc')
    suite.addTest(build_doctest_suite(base_dir, tests_path, special_tests,
                                      layer, setUp, tearDown, package))
    return suite