Move common libs to libs/common

libs/common/pbr/tests/test_packaging.py

@@ -0,0 +1,923 @@
+# Copyright (c) 2013 New Dream Network, LLC (DreamHost)
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Copyright (C) 2013 Association of Universities for Research in Astronomy
+#                    (AURA)
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+#     1. Redistributions of source code must retain the above copyright
+#        notice, this list of conditions and the following disclaimer.
+#
+#     2. Redistributions in binary form must reproduce the above
+#        copyright notice, this list of conditions and the following
+#        disclaimer in the documentation and/or other materials provided
+#        with the distribution.
+#
+#     3. The name of AURA and its representatives may not be used to
+#        endorse or promote products derived from this software without
+#        specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY AURA ``AS IS'' AND ANY EXPRESS OR IMPLIED
+# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL AURA BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+
+import email
+import email.errors
+import imp
+import os
+import re
+import sysconfig
+import tempfile
+import textwrap
+
+import fixtures
+import mock
+import pkg_resources
+import six
+import testscenarios
+import testtools
+from testtools import matchers
+import virtualenv
+from wheel import wheelfile
+
+from pbr import git
+from pbr import packaging
+from pbr.tests import base
+
+
+PBR_ROOT = os.path.abspath(os.path.join(__file__, '..', '..', '..'))
+
+
+class TestRepo(fixtures.Fixture):
+    """A git repo for testing with.
+
+    Use of TempHomeDir with this fixture is strongly recommended as due to the
+    lack of config --local in older gits, it will write to the users global
+    configuration without TempHomeDir.
+    """
+
+    def __init__(self, basedir):
+        super(TestRepo, self).__init__()
+        self._basedir = basedir
+
+    def setUp(self):
+        super(TestRepo, self).setUp()
+        base._run_cmd(['git', 'init', '.'], self._basedir)
+        base._config_git()
+        base._run_cmd(['git', 'add', '.'], self._basedir)
+
+    def commit(self, message_content='test commit'):
+        files = len(os.listdir(self._basedir))
+        path = self._basedir + '/%d' % files
+        open(path, 'wt').close()
+        base._run_cmd(['git', 'add', path], self._basedir)
+        base._run_cmd(['git', 'commit', '-m', message_content], self._basedir)
+
+    def uncommit(self):
+        base._run_cmd(['git', 'reset', '--hard', 'HEAD^'], self._basedir)
+
+    def tag(self, version):
+        base._run_cmd(
+            ['git', 'tag', '-sm', 'test tag', version], self._basedir)
+
+
+class GPGKeyFixture(fixtures.Fixture):
+    """Creates a GPG key for testing.
+
+    It's recommended that this be used in concert with a unique home
+    directory.
+    """
+
+    def setUp(self):
+        super(GPGKeyFixture, self).setUp()
+        tempdir = self.useFixture(fixtures.TempDir())
+        gnupg_version_re = re.compile('^gpg\s.*\s([\d+])\.([\d+])\.([\d+])')
+        gnupg_version = base._run_cmd(['gpg', '--version'], tempdir.path)
+        for line in gnupg_version[0].split('\n'):
+            gnupg_version = gnupg_version_re.match(line)
+            if gnupg_version:
+                gnupg_version = (int(gnupg_version.group(1)),
+                                 int(gnupg_version.group(2)),
+                                 int(gnupg_version.group(3)))
+                break
+        else:
+            if gnupg_version is None:
+                gnupg_version = (0, 0, 0)
+        config_file = tempdir.path + '/key-config'
+        f = open(config_file, 'wt')
+        try:
+            if gnupg_version[0] == 2 and gnupg_version[1] >= 1:
+                f.write("""
+                %no-protection
+                %transient-key
+                """)
+            f.write("""
+            %no-ask-passphrase
+            Key-Type: RSA
+            Name-Real: Example Key
+            Name-Comment: N/A
+            Name-Email: example@example.com
+            Expire-Date: 2d
+            Preferences: (setpref)
+            %commit
+            """)
+        finally:
+            f.close()
+        # Note that --quick-random (--debug-quick-random in GnuPG 2.x)
+        # does not have a corresponding preferences file setting and
+        # must be passed explicitly on the command line instead
+        if gnupg_version[0] == 1:
+            gnupg_random = '--quick-random'
+        elif gnupg_version[0] >= 2:
+            gnupg_random = '--debug-quick-random'
+        else:
+            gnupg_random = ''
+        base._run_cmd(
+            ['gpg', '--gen-key', '--batch', gnupg_random, config_file],
+            tempdir.path)
+
+
+class Venv(fixtures.Fixture):
+    """Create a virtual environment for testing with.
+
+    :attr path: The path to the environment root.
+    :attr python: The path to the python binary in the environment.
+    """
+
+    def __init__(self, reason, modules=(), pip_cmd=None):
+        """Create a Venv fixture.
+
+        :param reason: A human readable string to bake into the venv
+            file path to aid diagnostics in the case of failures.
+        :param modules: A list of modules to install, defaults to latest
+            pip, wheel, and the working copy of PBR.
+        :attr pip_cmd: A list to override the default pip_cmd passed to
+            python for installing base packages.
+        """
+        self._reason = reason
+        if modules == ():
+            pbr = 'file://%s#egg=pbr' % PBR_ROOT
+            modules = ['pip', 'wheel', pbr]
+        self.modules = modules
+        if pip_cmd is None:
+            self.pip_cmd = ['-m', 'pip', 'install']
+        else:
+            self.pip_cmd = pip_cmd
+
+    def _setUp(self):
+        path = self.useFixture(fixtures.TempDir()).path
+        virtualenv.create_environment(path, clear=True)
+        python = os.path.join(path, 'bin', 'python')
+        command = [python] + self.pip_cmd + ['-U']
+        if self.modules and len(self.modules) > 0:
+            command.extend(self.modules)
+            self.useFixture(base.CapturedSubprocess(
+                'mkvenv-' + self._reason, command))
+        self.addCleanup(delattr, self, 'path')
+        self.addCleanup(delattr, self, 'python')
+        self.path = path
+        self.python = python
+        return path, python
+
+
+class CreatePackages(fixtures.Fixture):
+    """Creates packages from dict with defaults
+
+        :param package_dirs: A dict of package name to directory strings
+        {'pkg_a': '/tmp/path/to/tmp/pkg_a', 'pkg_b': '/tmp/path/to/tmp/pkg_b'}
+    """
+
+    defaults = {
+        'setup.py': textwrap.dedent(six.u("""\
+            #!/usr/bin/env python
+            import setuptools
+            setuptools.setup(
+                setup_requires=['pbr'],
+                pbr=True,
+            )
+        """)),
+        'setup.cfg': textwrap.dedent(six.u("""\
+            [metadata]
+            name = {pkg_name}
+        """))
+    }
+
+    def __init__(self, packages):
+        """Creates packages from dict with defaults
+
+            :param packages: a dict where the keys are the package name and a
+            value that is a second dict that may be empty, containing keys of
+            filenames and a string value of the contents.
+            {'package-a': {'requirements.txt': 'string', 'setup.cfg': 'string'}
+        """
+        self.packages = packages
+
+    def _writeFile(self, directory, file_name, contents):
+        path = os.path.abspath(os.path.join(directory, file_name))
+        path_dir = os.path.dirname(path)
+        if not os.path.exists(path_dir):
+            if path_dir.startswith(directory):
+                os.makedirs(path_dir)
+            else:
+                raise ValueError
+        with open(path, 'wt') as f:
+            f.write(contents)
+
+    def _setUp(self):
+        tmpdir = self.useFixture(fixtures.TempDir()).path
+        package_dirs = {}
+        for pkg_name in self.packages:
+            pkg_path = os.path.join(tmpdir, pkg_name)
+            package_dirs[pkg_name] = pkg_path
+            os.mkdir(pkg_path)
+            for cf in ['setup.py', 'setup.cfg']:
+                if cf in self.packages[pkg_name]:
+                    contents = self.packages[pkg_name].pop(cf)
+                else:
+                    contents = self.defaults[cf].format(pkg_name=pkg_name)
+                self._writeFile(pkg_path, cf, contents)
+
+            for cf in self.packages[pkg_name]:
+                self._writeFile(pkg_path, cf, self.packages[pkg_name][cf])
+            self.useFixture(TestRepo(pkg_path)).commit()
+        self.addCleanup(delattr, self, 'package_dirs')
+        self.package_dirs = package_dirs
+        return package_dirs
+
+
+class TestPackagingInGitRepoWithCommit(base.BaseTestCase):
+
+    scenarios = [
+        ('preversioned', dict(preversioned=True)),
+        ('postversioned', dict(preversioned=False)),
+    ]
+
+    def setUp(self):
+        super(TestPackagingInGitRepoWithCommit, self).setUp()
+        self.repo = self.useFixture(TestRepo(self.package_dir))
+        self.repo.commit()
+
+    def test_authors(self):
+        self.run_setup('sdist', allow_fail=False)
+        # One commit, something should be in the authors list
+        with open(os.path.join(self.package_dir, 'AUTHORS'), 'r') as f:
+            body = f.read()
+        self.assertNotEqual(body, '')
+
+    def test_changelog(self):
+        self.run_setup('sdist', allow_fail=False)
+        with open(os.path.join(self.package_dir, 'ChangeLog'), 'r') as f:
+            body = f.read()
+        # One commit, something should be in the ChangeLog list
+        self.assertNotEqual(body, '')
+
+    def test_changelog_handles_astrisk(self):
+        self.repo.commit(message_content="Allow *.openstack.org to work")
+        self.run_setup('sdist', allow_fail=False)
+        with open(os.path.join(self.package_dir, 'ChangeLog'), 'r') as f:
+            body = f.read()
+        self.assertIn('\*', body)
+
+    def test_changelog_handles_dead_links_in_commit(self):
+        self.repo.commit(message_content="See os_ for to_do about qemu_.")
+        self.run_setup('sdist', allow_fail=False)
+        with open(os.path.join(self.package_dir, 'ChangeLog'), 'r') as f:
+            body = f.read()
+        self.assertIn('os\_', body)
+        self.assertIn('to\_do', body)
+        self.assertIn('qemu\_', body)
+
+    def test_changelog_handles_backticks(self):
+        self.repo.commit(message_content="Allow `openstack.org` to `work")
+        self.run_setup('sdist', allow_fail=False)
+        with open(os.path.join(self.package_dir, 'ChangeLog'), 'r') as f:
+            body = f.read()
+        self.assertIn('\`', body)
+
+    def test_manifest_exclude_honoured(self):
+        self.run_setup('sdist', allow_fail=False)
+        with open(os.path.join(
+                self.package_dir,
+                'pbr_testpackage.egg-info/SOURCES.txt'), 'r') as f:
+            body = f.read()
+        self.assertThat(
+            body, matchers.Not(matchers.Contains('pbr_testpackage/extra.py')))
+        self.assertThat(body, matchers.Contains('pbr_testpackage/__init__.py'))
+
+    def test_install_writes_changelog(self):
+        stdout, _, _ = self.run_setup(
+            'install', '--root', self.temp_dir + 'installed',
+            allow_fail=False)
+        self.expectThat(stdout, matchers.Contains('Generating ChangeLog'))
+
+
+class TestExtrafileInstallation(base.BaseTestCase):
+    def test_install_glob(self):
+        stdout, _, _ = self.run_setup(
+            'install', '--root', self.temp_dir + 'installed',
+            allow_fail=False)
+        self.expectThat(
+            stdout, matchers.Contains('copying data_files/a.txt'))
+        self.expectThat(
+            stdout, matchers.Contains('copying data_files/b.txt'))
+
+
+class TestPackagingInGitRepoWithoutCommit(base.BaseTestCase):
+
+    def setUp(self):
+        super(TestPackagingInGitRepoWithoutCommit, self).setUp()
+        self.useFixture(TestRepo(self.package_dir))
+        self.run_setup('sdist', allow_fail=False)
+
+    def test_authors(self):
+        # No commits, no authors in list
+        with open(os.path.join(self.package_dir, 'AUTHORS'), 'r') as f:
+            body = f.read()
+        self.assertEqual('\n', body)
+
+    def test_changelog(self):
+        # No commits, nothing should be in the ChangeLog list
+        with open(os.path.join(self.package_dir, 'ChangeLog'), 'r') as f:
+            body = f.read()
+        self.assertEqual('CHANGES\n=======\n\n', body)
+
+
+class TestPackagingWheels(base.BaseTestCase):
+
+    def setUp(self):
+        super(TestPackagingWheels, self).setUp()
+        self.useFixture(TestRepo(self.package_dir))
+        # Build the wheel
+        self.run_setup('bdist_wheel', allow_fail=False)
+        # Slowly construct the path to the generated whl
+        dist_dir = os.path.join(self.package_dir, 'dist')
+        relative_wheel_filename = os.listdir(dist_dir)[0]
+        absolute_wheel_filename = os.path.join(
+            dist_dir, relative_wheel_filename)
+        wheel_file = wheelfile.WheelFile(absolute_wheel_filename)
+        wheel_name = wheel_file.parsed_filename.group('namever')
+        # Create a directory path to unpack the wheel to
+        self.extracted_wheel_dir = os.path.join(dist_dir, wheel_name)
+        # Extract the wheel contents to the directory we just created
+        wheel_file.extractall(self.extracted_wheel_dir)
+        wheel_file.close()
+
+    def test_data_directory_has_wsgi_scripts(self):
+        # Build the path to the scripts directory
+        scripts_dir = os.path.join(
+            self.extracted_wheel_dir, 'pbr_testpackage-0.0.data/scripts')
+        self.assertTrue(os.path.exists(scripts_dir))
+        scripts = os.listdir(scripts_dir)
+
+        self.assertIn('pbr_test_wsgi', scripts)
+        self.assertIn('pbr_test_wsgi_with_class', scripts)
+        self.assertNotIn('pbr_test_cmd', scripts)
+        self.assertNotIn('pbr_test_cmd_with_class', scripts)
+
+    def test_generates_c_extensions(self):
+        built_package_dir = os.path.join(
+            self.extracted_wheel_dir, 'pbr_testpackage')
+        static_object_filename = 'testext.so'
+        soabi = get_soabi()
+        if soabi:
+            static_object_filename = 'testext.{0}.so'.format(soabi)
+        static_object_path = os.path.join(
+            built_package_dir, static_object_filename)
+
+        self.assertTrue(os.path.exists(built_package_dir))
+        self.assertTrue(os.path.exists(static_object_path))
+
+
+class TestPackagingHelpers(testtools.TestCase):
+
+    def test_generate_script(self):
+        group = 'console_scripts'
+        entry_point = pkg_resources.EntryPoint(
+            name='test-ep',
+            module_name='pbr.packaging',
+            attrs=('LocalInstallScripts',))
+        header = '#!/usr/bin/env fake-header\n'
+        template = ('%(group)s %(module_name)s %(import_target)s '
+                    '%(invoke_target)s')
+
+        generated_script = packaging.generate_script(
+            group, entry_point, header, template)
+
+        expected_script = (
+            '#!/usr/bin/env fake-header\nconsole_scripts pbr.packaging '
+            'LocalInstallScripts LocalInstallScripts'
+        )
+        self.assertEqual(expected_script, generated_script)
+
+    def test_generate_script_validates_expectations(self):
+        group = 'console_scripts'
+        entry_point = pkg_resources.EntryPoint(
+            name='test-ep',
+            module_name='pbr.packaging')
+        header = '#!/usr/bin/env fake-header\n'
+        template = ('%(group)s %(module_name)s %(import_target)s '
+                    '%(invoke_target)s')
+        self.assertRaises(
+            ValueError, packaging.generate_script, group, entry_point, header,
+            template)
+
+        entry_point = pkg_resources.EntryPoint(
+            name='test-ep',
+            module_name='pbr.packaging',
+            attrs=('attr1', 'attr2', 'attr3'))
+        self.assertRaises(
+            ValueError, packaging.generate_script, group, entry_point, header,
+            template)
+
+
+class TestPackagingInPlainDirectory(base.BaseTestCase):
+
+    def setUp(self):
+        super(TestPackagingInPlainDirectory, self).setUp()
+
+    def test_authors(self):
+        self.run_setup('sdist', allow_fail=False)
+        # Not a git repo, no AUTHORS file created
+        filename = os.path.join(self.package_dir, 'AUTHORS')
+        self.assertFalse(os.path.exists(filename))
+
+    def test_changelog(self):
+        self.run_setup('sdist', allow_fail=False)
+        # Not a git repo, no ChangeLog created
+        filename = os.path.join(self.package_dir, 'ChangeLog')
+        self.assertFalse(os.path.exists(filename))
+
+    def test_install_no_ChangeLog(self):
+        stdout, _, _ = self.run_setup(
+            'install', '--root', self.temp_dir + 'installed',
+            allow_fail=False)
+        self.expectThat(
+            stdout, matchers.Not(matchers.Contains('Generating ChangeLog')))
+
+
+class TestPresenceOfGit(base.BaseTestCase):
+
+    def testGitIsInstalled(self):
+        with mock.patch.object(git,
+                               '_run_shell_command') as _command:
+            _command.return_value = 'git version 1.8.4.1'
+            self.assertEqual(True, git._git_is_installed())
+
+    def testGitIsNotInstalled(self):
+        with mock.patch.object(git,
+                               '_run_shell_command') as _command:
+            _command.side_effect = OSError
+            self.assertEqual(False, git._git_is_installed())
+
+
+class ParseRequirementsTest(base.BaseTestCase):
+
+    def test_empty_requirements(self):
+        actual = packaging.parse_requirements([])
+        self.assertEqual([], actual)
+
+    def test_default_requirements(self):
+        """Ensure default files used if no files provided."""
+        tempdir = tempfile.mkdtemp()
+        requirements = os.path.join(tempdir, 'requirements.txt')
+        with open(requirements, 'w') as f:
+            f.write('pbr')
+        # the defaults are relative to where pbr is called from so we need to
+        # override them. This is OK, however, as we want to validate that
+        # defaults are used - not what those defaults are
+        with mock.patch.object(packaging, 'REQUIREMENTS_FILES', (
+                requirements,)):
+            result = packaging.parse_requirements()
+        self.assertEqual(['pbr'], result)
+
+    def test_override_with_env(self):
+        """Ensure environment variable used if no files provided."""
+        _, tmp_file = tempfile.mkstemp(prefix='openstack', suffix='.setup')
+        with open(tmp_file, 'w') as fh:
+            fh.write("foo\nbar")
+        self.useFixture(
+            fixtures.EnvironmentVariable('PBR_REQUIREMENTS_FILES', tmp_file))
+        self.assertEqual(['foo', 'bar'],
+                         packaging.parse_requirements())
+
+    def test_override_with_env_multiple_files(self):
+        _, tmp_file = tempfile.mkstemp(prefix='openstack', suffix='.setup')
+        with open(tmp_file, 'w') as fh:
+            fh.write("foo\nbar")
+        self.useFixture(
+            fixtures.EnvironmentVariable('PBR_REQUIREMENTS_FILES',
+                                         "no-such-file," + tmp_file))
+        self.assertEqual(['foo', 'bar'],
+                         packaging.parse_requirements())
+
+    def test_index_present(self):
+        tempdir = tempfile.mkdtemp()
+        requirements = os.path.join(tempdir, 'requirements.txt')
+        with open(requirements, 'w') as f:
+            f.write('-i https://myindex.local')
+            f.write('  --index-url https://myindex.local')
+            f.write(' --extra-index-url https://myindex.local')
+        result = packaging.parse_requirements([requirements])
+        self.assertEqual([], result)
+
+    def test_nested_requirements(self):
+        tempdir = tempfile.mkdtemp()
+        requirements = os.path.join(tempdir, 'requirements.txt')
+        nested = os.path.join(tempdir, 'nested.txt')
+        with open(requirements, 'w') as f:
+            f.write('-r ' + nested)
+        with open(nested, 'w') as f:
+            f.write('pbr')
+        result = packaging.parse_requirements([requirements])
+        self.assertEqual(['pbr'], result)
+
+
+class ParseRequirementsTestScenarios(base.BaseTestCase):
+
+    versioned_scenarios = [
+        ('non-versioned', {'versioned': False, 'expected': ['bar']}),
+        ('versioned', {'versioned': True, 'expected': ['bar>=1.2.3']})
+    ]
+
+    subdirectory_scenarios = [
+        ('non-subdirectory', {'has_subdirectory': False}),
+        ('has-subdirectory', {'has_subdirectory': True})
+    ]
+
+    scenarios = [
+        ('normal', {'url': "foo\nbar", 'expected': ['foo', 'bar']}),
+        ('normal_with_comments', {
+            'url': "# this is a comment\nfoo\n# and another one\nbar",
+            'expected': ['foo', 'bar']}),
+        ('removes_index_lines', {'url': '-f foobar', 'expected': []}),
+    ]
+
+    scenarios = scenarios + testscenarios.multiply_scenarios([
+        ('ssh_egg_url', {'url': 'git+ssh://foo.com/zipball#egg=bar'}),
+        ('git_https_egg_url', {'url': 'git+https://foo.com/zipball#egg=bar'}),
+        ('http_egg_url', {'url': 'https://foo.com/zipball#egg=bar'}),
+    ], versioned_scenarios, subdirectory_scenarios)
+
+    scenarios = scenarios + testscenarios.multiply_scenarios(
+        [
+            ('git_egg_url',
+                {'url': 'git://foo.com/zipball#egg=bar', 'name': 'bar'})
+        ], [
+            ('non-editable', {'editable': False}),
+            ('editable', {'editable': True}),
+        ],
+        versioned_scenarios, subdirectory_scenarios)
+
+    def test_parse_requirements(self):
+        tmp_file = tempfile.NamedTemporaryFile()
+        req_string = self.url
+        if hasattr(self, 'editable') and self.editable:
+            req_string = ("-e %s" % req_string)
+        if hasattr(self, 'versioned') and self.versioned:
+            req_string = ("%s-1.2.3" % req_string)
+        if hasattr(self, 'has_subdirectory') and self.has_subdirectory:
+            req_string = ("%s&subdirectory=baz" % req_string)
+        with open(tmp_file.name, 'w') as fh:
+            fh.write(req_string)
+        self.assertEqual(self.expected,
+                         packaging.parse_requirements([tmp_file.name]))
+
+
+class ParseDependencyLinksTest(base.BaseTestCase):
+
+    def setUp(self):
+        super(ParseDependencyLinksTest, self).setUp()
+        _, self.tmp_file = tempfile.mkstemp(prefix="openstack",
+                                            suffix=".setup")
+
+    def test_parse_dependency_normal(self):
+        with open(self.tmp_file, "w") as fh:
+            fh.write("http://test.com\n")
+        self.assertEqual(
+            ["http://test.com"],
+            packaging.parse_dependency_links([self.tmp_file]))
+
+    def test_parse_dependency_with_git_egg_url(self):
+        with open(self.tmp_file, "w") as fh:
+            fh.write("-e git://foo.com/zipball#egg=bar")
+        self.assertEqual(
+            ["git://foo.com/zipball#egg=bar"],
+            packaging.parse_dependency_links([self.tmp_file]))
+
+
+class TestVersions(base.BaseTestCase):
+
+    scenarios = [
+        ('preversioned', dict(preversioned=True)),
+        ('postversioned', dict(preversioned=False)),
+    ]
+
+    def setUp(self):
+        super(TestVersions, self).setUp()
+        self.repo = self.useFixture(TestRepo(self.package_dir))
+        self.useFixture(GPGKeyFixture())
+        self.useFixture(base.DiveDir(self.package_dir))
+
+    def test_email_parsing_errors_are_handled(self):
+        mocked_open = mock.mock_open()
+        with mock.patch('pbr.packaging.open', mocked_open):
+            with mock.patch('email.message_from_file') as message_from_file:
+                message_from_file.side_effect = [
+                    email.errors.MessageError('Test'),
+                    {'Name': 'pbr_testpackage'}]
+                version = packaging._get_version_from_pkg_metadata(
+                    'pbr_testpackage')
+
+        self.assertTrue(message_from_file.called)
+        self.assertIsNone(version)
+
+    def test_capitalized_headers(self):
+        self.repo.commit()
+        self.repo.tag('1.2.3')
+        self.repo.commit('Sem-Ver: api-break')
+        version = packaging._get_version_from_git()
+        self.assertThat(version, matchers.StartsWith('2.0.0.dev1'))
+
+    def test_capitalized_headers_partial(self):
+        self.repo.commit()
+        self.repo.tag('1.2.3')
+        self.repo.commit('Sem-ver: api-break')
+        version = packaging._get_version_from_git()
+        self.assertThat(version, matchers.StartsWith('2.0.0.dev1'))
+
+    def test_tagged_version_has_tag_version(self):
+        self.repo.commit()
+        self.repo.tag('1.2.3')
+        version = packaging._get_version_from_git('1.2.3')
+        self.assertEqual('1.2.3', version)
+
+    def test_non_canonical_tagged_version_bump(self):
+        self.repo.commit()
+        self.repo.tag('1.4')
+        self.repo.commit('Sem-Ver: api-break')
+        version = packaging._get_version_from_git()
+        self.assertThat(version, matchers.StartsWith('2.0.0.dev1'))
+
+    def test_untagged_version_has_dev_version_postversion(self):
+        self.repo.commit()
+        self.repo.tag('1.2.3')
+        self.repo.commit()
+        version = packaging._get_version_from_git()
+        self.assertThat(version, matchers.StartsWith('1.2.4.dev1'))
+
+    def test_untagged_pre_release_has_pre_dev_version_postversion(self):
+        self.repo.commit()
+        self.repo.tag('1.2.3.0a1')
+        self.repo.commit()
+        version = packaging._get_version_from_git()
+        self.assertThat(version, matchers.StartsWith('1.2.3.0a2.dev1'))
+
+    def test_untagged_version_minor_bump(self):
+        self.repo.commit()
+        self.repo.tag('1.2.3')
+        self.repo.commit('sem-ver: deprecation')
+        version = packaging._get_version_from_git()
+        self.assertThat(version, matchers.StartsWith('1.3.0.dev1'))
+
+    def test_untagged_version_major_bump(self):
+        self.repo.commit()
+        self.repo.tag('1.2.3')
+        self.repo.commit('sem-ver: api-break')
+        version = packaging._get_version_from_git()
+        self.assertThat(version, matchers.StartsWith('2.0.0.dev1'))
+
+    def test_untagged_version_has_dev_version_preversion(self):
+        self.repo.commit()
+        self.repo.tag('1.2.3')
+        self.repo.commit()
+        version = packaging._get_version_from_git('1.2.5')
+        self.assertThat(version, matchers.StartsWith('1.2.5.dev1'))
+
+    def test_untagged_version_after_pre_has_dev_version_preversion(self):
+        self.repo.commit()
+        self.repo.tag('1.2.3.0a1')
+        self.repo.commit()
+        version = packaging._get_version_from_git('1.2.5')
+        self.assertThat(version, matchers.StartsWith('1.2.5.dev1'))
+
+    def test_untagged_version_after_rc_has_dev_version_preversion(self):
+        self.repo.commit()
+        self.repo.tag('1.2.3.0a1')
+        self.repo.commit()
+        version = packaging._get_version_from_git('1.2.3')
+        self.assertThat(version, matchers.StartsWith('1.2.3.0a2.dev1'))
+
+    def test_preversion_too_low_simple(self):
+        # That is, the target version is either already released or not high
+        # enough for the semver requirements given api breaks etc.
+        self.repo.commit()
+        self.repo.tag('1.2.3')
+        self.repo.commit()
+        # Note that we can't target 1.2.3 anymore - with 1.2.3 released we
+        # need to be working on 1.2.4.
+        err = self.assertRaises(
+            ValueError, packaging._get_version_from_git, '1.2.3')
+        self.assertThat(err.args[0], matchers.StartsWith('git history'))
+
+    def test_preversion_too_low_semver_headers(self):
+        # That is, the target version is either already released or not high
+        # enough for the semver requirements given api breaks etc.
+        self.repo.commit()
+        self.repo.tag('1.2.3')
+        self.repo.commit('sem-ver: feature')
+        # Note that we can't target 1.2.4, the feature header means we need
+        # to be working on 1.3.0 or above.
+        err = self.assertRaises(
+            ValueError, packaging._get_version_from_git, '1.2.4')
+        self.assertThat(err.args[0], matchers.StartsWith('git history'))
+
+    def test_get_kwargs_corner_cases(self):
+        # No tags:
+        git_dir = self.repo._basedir + '/.git'
+        get_kwargs = lambda tag: packaging._get_increment_kwargs(git_dir, tag)
+
+        def _check_combinations(tag):
+            self.repo.commit()
+            self.assertEqual(dict(), get_kwargs(tag))
+            self.repo.commit('sem-ver: bugfix')
+            self.assertEqual(dict(), get_kwargs(tag))
+            self.repo.commit('sem-ver: feature')
+            self.assertEqual(dict(minor=True), get_kwargs(tag))
+            self.repo.uncommit()
+            self.repo.commit('sem-ver: deprecation')
+            self.assertEqual(dict(minor=True), get_kwargs(tag))
+            self.repo.uncommit()
+            self.repo.commit('sem-ver: api-break')
+            self.assertEqual(dict(major=True), get_kwargs(tag))
+            self.repo.commit('sem-ver: deprecation')
+            self.assertEqual(dict(major=True, minor=True), get_kwargs(tag))
+        _check_combinations('')
+        self.repo.tag('1.2.3')
+        _check_combinations('1.2.3')
+
+    def test_invalid_tag_ignored(self):
+        # Fix for bug 1356784 - we treated any tag as a version, not just those
+        # that are valid versions.
+        self.repo.commit()
+        self.repo.tag('1')
+        self.repo.commit()
+        # when the tree is tagged and its wrong:
+        self.repo.tag('badver')
+        version = packaging._get_version_from_git()
+        self.assertThat(version, matchers.StartsWith('1.0.1.dev1'))
+        # When the tree isn't tagged, we also fall through.
+        self.repo.commit()
+        version = packaging._get_version_from_git()
+        self.assertThat(version, matchers.StartsWith('1.0.1.dev2'))
+        # We don't fall through x.y versions
+        self.repo.commit()
+        self.repo.tag('1.2')
+        self.repo.commit()
+        self.repo.tag('badver2')
+        version = packaging._get_version_from_git()
+        self.assertThat(version, matchers.StartsWith('1.2.1.dev1'))
+        # Or x.y.z versions
+        self.repo.commit()
+        self.repo.tag('1.2.3')
+        self.repo.commit()
+        self.repo.tag('badver3')
+        version = packaging._get_version_from_git()
+        self.assertThat(version, matchers.StartsWith('1.2.4.dev1'))
+        # Or alpha/beta/pre versions
+        self.repo.commit()
+        self.repo.tag('1.2.4.0a1')
+        self.repo.commit()
+        self.repo.tag('badver4')
+        version = packaging._get_version_from_git()
+        self.assertThat(version, matchers.StartsWith('1.2.4.0a2.dev1'))
+        # Non-release related tags are ignored.
+        self.repo.commit()
+        self.repo.tag('2')
+        self.repo.commit()
+        self.repo.tag('non-release-tag/2014.12.16-1')
+        version = packaging._get_version_from_git()
+        self.assertThat(version, matchers.StartsWith('2.0.1.dev1'))
+
+    def test_valid_tag_honoured(self):
+        # Fix for bug 1370608 - we converted any target into a 'dev version'
+        # even if there was a distance of 0 - indicating that we were on the
+        # tag itself.
+        self.repo.commit()
+        self.repo.tag('1.3.0.0a1')
+        version = packaging._get_version_from_git()
+        self.assertEqual('1.3.0.0a1', version)
+
+    def test_skip_write_git_changelog(self):
+        # Fix for bug 1467440
+        self.repo.commit()
+        self.repo.tag('1.2.3')
+        os.environ['SKIP_WRITE_GIT_CHANGELOG'] = '1'
+        version = packaging._get_version_from_git('1.2.3')
+        self.assertEqual('1.2.3', version)
+
+    def tearDown(self):
+        super(TestVersions, self).tearDown()
+        os.environ.pop('SKIP_WRITE_GIT_CHANGELOG', None)
+
+
+class TestRequirementParsing(base.BaseTestCase):
+
+    def test_requirement_parsing(self):
+        pkgs = {
+            'test_reqparse':
+                {
+                    'requirements.txt': textwrap.dedent("""\
+                        bar
+                        quux<1.0; python_version=='2.6'
+                        requests-aws>=0.1.4    # BSD License (3 clause)
+                        Routes>=1.12.3,!=2.0,!=2.1;python_version=='2.7'
+                        requests-kerberos>=0.6;python_version=='2.7' # MIT
+                    """),
+                    'setup.cfg': textwrap.dedent("""\
+                        [metadata]
+                        name = test_reqparse
+
+                        [extras]
+                        test =
+                            foo
+                            baz>3.2 :python_version=='2.7' # MIT
+                            bar>3.3 :python_version=='2.7' # MIT # Apache
+                    """)},
+        }
+        pkg_dirs = self.useFixture(CreatePackages(pkgs)).package_dirs
+        pkg_dir = pkg_dirs['test_reqparse']
+        # pkg_resources.split_sections uses None as the title of an
+        # anonymous section instead of the empty string. Weird.
+        expected_requirements = {
+            None: ['bar', 'requests-aws>=0.1.4'],
+            ":(python_version=='2.6')": ['quux<1.0'],
+            ":(python_version=='2.7')": ['Routes!=2.0,!=2.1,>=1.12.3',
+                                         'requests-kerberos>=0.6'],
+            'test': ['foo'],
+            "test:(python_version=='2.7')": ['baz>3.2', 'bar>3.3']
+        }
+        venv = self.useFixture(Venv('reqParse'))
+        bin_python = venv.python
+        # Two things are tested by this
+        # 1) pbr properly parses markers from requiremnts.txt and setup.cfg
+        # 2) bdist_wheel causes pbr to not evaluate markers
+        self._run_cmd(bin_python, ('setup.py', 'bdist_wheel'),
+                      allow_fail=False, cwd=pkg_dir)
+        egg_info = os.path.join(pkg_dir, 'test_reqparse.egg-info')
+
+        requires_txt = os.path.join(egg_info, 'requires.txt')
+        with open(requires_txt, 'rt') as requires:
+            generated_requirements = dict(
+                pkg_resources.split_sections(requires))
+
+        # NOTE(dhellmann): We have to spell out the comparison because
+        # the rendering for version specifiers in a range is not
+        # consistent across versions of setuptools.
+
+        for section, expected in expected_requirements.items():
+            exp_parsed = [
+                pkg_resources.Requirement.parse(s)
+                for s in expected
+            ]
+            gen_parsed = [
+                pkg_resources.Requirement.parse(s)
+                for s in generated_requirements[section]
+            ]
+            self.assertEqual(exp_parsed, gen_parsed)
+
+
+def get_soabi():
+    soabi = None
+    try:
+        soabi = sysconfig.get_config_var('SOABI')
+        arch = sysconfig.get_config_var('MULTIARCH')
+    except IOError:
+        pass
+    if soabi and arch and 'pypy' in sysconfig.get_scheme_names():
+        soabi = '%s-%s' % (soabi, arch)
+    if soabi is None and 'pypy' in sysconfig.get_scheme_names():
+        # NOTE(sigmavirus24): PyPy only added support for the SOABI config var
+        # to sysconfig in 2015. That was well after 2.2.1 was published in the
+        # Ubuntu 14.04 archive.
+        for suffix, _, _ in imp.get_suffixes():
+            if suffix.startswith('.pypy') and suffix.endswith('.so'):
+                soabi = suffix.split('.')[1]
+                break
+    return soabi