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import os
import sys
import unittest
from contextlib import contextmanager
from mocker import Mocker
from mocker import MockerTestCase
from cloudinit import helpers as ch
from cloudinit import util
import shutil
# Handle how 2.6 doesn't have the assertIn or assertNotIn
_PY_VER = sys.version_info
_PY_MAJOR, _PY_MINOR = _PY_VER[0:2]
if (_PY_MAJOR, _PY_MINOR) <= (2, 6):
# For now add these on, taken from python 2.7 + slightly adjusted
class TestCase(unittest.TestCase):
def assertIn(self, member, container, msg=None):
if member not in container:
standardMsg = '%r not found in %r' % (member, container)
self.fail(self._formatMessage(msg, standardMsg))
def assertNotIn(self, member, container, msg=None):
if member in container:
standardMsg = '%r unexpectedly found in %r'
standardMsg = standardMsg % (member, container)
self.fail(self._formatMessage(msg, standardMsg))
else:
class TestCase(unittest.TestCase):
pass
@contextmanager
def mocker(verify_calls=True):
m = Mocker()
try:
yield m
finally:
m.restore()
if verify_calls:
m.verify()
# Makes the old path start
# with new base instead of whatever
# it previously had
def rebase_path(old_path, new_base):
if old_path.startswith(new_base):
# Already handled...
return old_path
# Retarget the base of that path
# to the new base instead of the
# old one...
path = os.path.join(new_base, old_path.lstrip("/"))
path = os.path.abspath(path)
return path
# Can work on anything that takes a path as arguments
def retarget_many_wrapper(new_base, am, old_func):
def wrapper(*args, **kwds):
n_args = list(args)
nam = am
if am == -1:
nam = len(n_args)
for i in range(0, nam):
path = args[i]
n_args[i] = rebase_path(path, new_base)
return old_func(*n_args, **kwds)
return wrapper
class ResourceUsingTestCase(MockerTestCase):
def __init__(self, methodName="runTest"):
MockerTestCase.__init__(self, methodName)
self.resource_path = None
def resourceLocation(self, subname=None):
if self.resource_path is None:
paths = [
os.path.join('tests', 'data'),
os.path.join('data'),
os.path.join(os.pardir, 'tests', 'data'),
os.path.join(os.pardir, 'data'),
]
for p in paths:
if os.path.isdir(p):
self.resource_path = p
break
self.assertTrue((self.resource_path and
os.path.isdir(self.resource_path)),
msg="Unable to locate test resource data path!")
if not subname:
return self.resource_path
return os.path.join(self.resource_path, subname)
def readResource(self, name):
where = self.resourceLocation(name)
with open(where, 'r') as fh:
return fh.read()
def getCloudPaths(self):
cp = ch.Paths({
'cloud_dir': self.makeDir(),
'templates_dir': self.resourceLocation(),
})
return cp
class FilesystemMockingTestCase(ResourceUsingTestCase):
def __init__(self, methodName="runTest"):
ResourceUsingTestCase.__init__(self, methodName)
self.patched_funcs = []
def replicateTestRoot(self, example_root, target_root):
real_root = self.resourceLocation()
real_root = os.path.join(real_root, 'roots', example_root)
for (dir_path, _dirnames, filenames) in os.walk(real_root):
real_path = dir_path
make_path = rebase_path(real_path[len(real_root):], target_root)
util.ensure_dir(make_path)
for f in filenames:
real_path = util.abs_join(real_path, f)
make_path = util.abs_join(make_path, f)
shutil.copy(real_path, make_path)
def tearDown(self):
self.restore()
ResourceUsingTestCase.tearDown(self)
def restore(self):
for (mod, f, func) in self.patched_funcs:
setattr(mod, f, func)
self.patched_funcs = []
def patchUtils(self, new_root):
patch_funcs = {
util: [('write_file', 1),
('append_file', 1),
('load_file', 1),
('ensure_dir', 1),
('chmod', 1),
('delete_dir_contents', 1),
('del_file', 1),
('sym_link', -1)],
}
for (mod, funcs) in patch_funcs.items():
for (f, am) in funcs:
func = getattr(mod, f)
trap_func = retarget_many_wrapper(new_root, am, func)
setattr(mod, f, trap_func)
self.patched_funcs.append((mod, f, func))
# Handle subprocess calls
func = getattr(util, 'subp')
def nsubp(*_args, **_kwargs):
return ('', '')
setattr(util, 'subp', nsubp)
self.patched_funcs.append((util, 'subp', func))
def null_func(*_args, **_kwargs):
return None
for f in ['chownbyid', 'chownbyname']:
func = getattr(util, f)
setattr(util, f, null_func)
self.patched_funcs.append((util, f, func))
def patchOS(self, new_root):
patch_funcs = {
os.path: ['isfile', 'exists', 'islink', 'isdir'],
os: ['listdir'],
}
for (mod, funcs) in patch_funcs.items():
for f in funcs:
func = getattr(mod, f)
trap_func = retarget_many_wrapper(new_root, 1, func)
setattr(mod, f, trap_func)
self.patched_funcs.append((mod, f, func))
def populate_dir(path, files):
os.makedirs(path)
for (name, content) in files.iteritems():
with open(os.path.join(path, name), "w") as fp:
fp.write(content)
fp.close()
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