diskimage-builder/diskimage_builder/test_elementdeps.py

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# Copyright 2013 Hewlett-Packard Development Company, L.P.
# All Rights Reserved.
#
# 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.
import os
import fixtures
import testtools
from diskimage_builder import elements
data_dir = os.path.abspath(
os.path.join(os.path.dirname(__file__), 'test-elements'))
def _populate_element(element_dir, element_name, element_deps=[]):
element_home = os.path.join(element_dir, element_name)
os.mkdir(element_home)
deps_path = os.path.join(element_home, 'element-deps')
with open(deps_path, 'w') as deps_file:
deps_file.write("\n".join(element_deps))
class TestElementDeps(testtools.TestCase):
def setUp(self):
super(TestElementDeps, self).setUp()
self.element_dir = self.useFixture(fixtures.TempDir()).path
_populate_element(self.element_dir, 'requires-foo', ['foo'])
_populate_element(self.element_dir, 'foo')
_populate_element(self.element_dir,
'requires-requires-foo',
['requires-foo'])
_populate_element(self.element_dir, 'self', ['self'])
_populate_element(self.element_dir, 'circular1', ['circular2'])
_populate_element(self.element_dir, 'circular2', ['circular1'])
def test_non_transitive_deps(self):
result = elements.expand_dependencies(
['requires-foo'],
elements_dir=self.element_dir)
self.assertEqual(set(['requires-foo', 'foo']), result)
def test_missing_deps(self):
self.assertRaises(SystemExit, elements.expand_dependencies, ['fake'],
self.element_dir)
def test_transitive_deps(self):
result = elements.expand_dependencies(
['requires-requires-foo'], elements_dir=self.element_dir)
self.assertEqual(set(['requires-requires-foo',
'requires-foo',
'foo']), result)
def test_no_deps(self):
result = elements.expand_dependencies(
['foo'], elements_dir=self.element_dir)
self.assertEqual(set(['foo']), result)
def test_self(self):
result = elements.expand_dependencies(
['self'], elements_dir=self.element_dir)
self.assertEqual(set(['self']), result)
def test_circular(self):
result = elements.expand_dependencies(
['circular1'], elements_dir=self.element_dir)
self.assertEqual(set(['circular1', 'circular2']), result)
class TestElements(testtools.TestCase):
def test_depends_on_env(self):
self.useFixture(
fixtures.EnvironmentVariable('ELEMENTS_PATH', '/foo/bar'))
self.assertEqual('/foo/bar', elements.get_elements_dir())
def test_env_not_set(self):
self.useFixture(fixtures.EnvironmentVariable('ELEMENTS_PATH', ''))
self.assertRaises(Exception, elements.get_elements_dir, ())