def test_lock_checks_group(tmpdir):
"""Ensure lock checks work with a self-owned, non-self-group repo."""
uid = getuid()
gid = next((g for g in group_ids() if g != uid), None)
if not gid:
pytest.skip("user has no group with gid != uid")
# self-owned, another group
tmpdir.chown(uid, gid)
# safe
path = str(tmpdir)
tmpdir.chmod(0o744)
lk.check_lock_safety(path)
# unsafe
tmpdir.chmod(0o774)
with pytest.raises(spack.error.SpackError):
lk.check_lock_safety(path)
# unsafe
tmpdir.chmod(0o777)
with pytest.raises(spack.error.SpackError):
lk.check_lock_safety(path)
# safe
tmpdir.chmod(0o474)
lk.check_lock_safety(path)
# safe
tmpdir.chmod(0o477)
lk.check_lock_safety(path)
def test_lock_checks_user(tmpdir):
"""Ensure lock checks work with a self-owned, self-group repo."""
uid = getuid()
if uid not in group_ids():
pytest.skip("user has no group with gid == uid")
# self-owned, own group
tmpdir.chown(uid, uid)
# safe
path = str(tmpdir)
tmpdir.chmod(0o744)
lk.check_lock_safety(path)
# safe
tmpdir.chmod(0o774)
lk.check_lock_safety(path)
# unsafe
tmpdir.chmod(0o777)
with pytest.raises(spack.error.SpackError):
lk.check_lock_safety(path)
# safe
tmpdir.chmod(0o474)
lk.check_lock_safety(path)
# safe
tmpdir.chmod(0o477)
lk.check_lock_safety(path)
def check_stage_dir_perms(prefix, path):
"""Check the stage directory perms to ensure match expectations."""
# Ensure the path's subdirectories -- to `$user` -- have their parent's
# perms while those from `$user` on are owned and restricted to the
# user.
assert path.startswith(prefix)
user = getpass.getuser()
prefix_status = os.stat(prefix)
uid = getuid()
# Obtain lists of ancestor and descendant paths of the $user node, if any.
#
# Skip processing prefix ancestors since no guarantee they will be in the
# required group (e.g. $TEMPDIR on HPC machines).
skip = prefix if prefix.endswith(os.sep) else prefix + os.sep
group_paths, user_node, user_paths = partition_path(
path.replace(skip, ""), user)
for p in group_paths:
p_status = os.stat(os.path.join(prefix, p))
assert p_status.st_gid == prefix_status.st_gid
assert p_status.st_mode == prefix_status.st_mode
# Add the path ending with the $user node to the user paths to ensure paths
# from $user (on down) meet the ownership and permission requirements.
if user_node:
user_paths.insert(0, user_node)
for p in user_paths:
p_status = os.stat(os.path.join(prefix, p))
assert uid == p_status.st_uid
assert p_status.st_mode & stat.S_IRWXU == stat.S_IRWXU
def create_stage_root(path):
# type: (str) -> None
"""Create the stage root directory and ensure appropriate access perms."""
assert os.path.isabs(path) and len(path.strip()) > 1
err_msg = 'Cannot create stage root {0}: Access to {1} is denied'
user_uid = getuid()
# Obtain lists of ancestor and descendant paths of the $user node, if any.
group_paths, user_node, user_paths = partition_path(
path, getpass.getuser())
for p in group_paths:
if not os.path.exists(p):
# Ensure access controls of subdirs created above `$user` inherit
# from the parent and share the group.
par_stat = os.stat(os.path.dirname(p))
mkdirp(p, group=par_stat.st_gid, mode=par_stat.st_mode)
p_stat = os.stat(p)
if par_stat.st_gid != p_stat.st_gid:
tty.warn(
"Expected {0} to have group {1}, but it is {2}".format(
p, par_stat.st_gid, p_stat.st_gid))
if par_stat.st_mode & p_stat.st_mode != par_stat.st_mode:
tty.warn(
"Expected {0} to support mode {1}, but it is {2}".format(
p, par_stat.st_mode, p_stat.st_mode))
if not can_access(p):
raise OSError(errno.EACCES, err_msg.format(path, p))
# Add the path ending with the $user node to the user paths to ensure paths
# from $user (on down) meet the ownership and permission requirements.
if user_node:
user_paths.insert(0, user_node)
for p in user_paths:
# Ensure access controls of subdirs from `$user` on down are
# restricted to the user.
owner_uid = get_owner_uid(p)
if user_uid != owner_uid:
tty.warn(
"Expected user {0} to own {1}, but it is owned by {2}".format(
user_uid, p, owner_uid))
spack_src_subdir = os.path.join(path, _source_path_subdir)
# When staging into a user-specified directory with `spack stage -p <PATH>`, we need
# to ensure the `spack-src` subdirectory exists, as we can't rely on it being
# created automatically by spack. It's not clear why this is the case for `spack
# stage -p`, but since `mkdirp()` is idempotent, this should not change the behavior
# for any other code paths.
if not os.path.isdir(spack_src_subdir):
mkdirp(spack_src_subdir, mode=stat.S_IRWXU)
def test_create_stage_root_bad_uid(self, tmpdir, monkeypatch):
"""
Test the code path that uses an existing user path -- whether `$user`
in `$tempdir` or not -- and triggers the generation of the UID
mismatch warning.
This situation can happen with some `config:build_stage` settings
for teams using a common service account for installing software.
"""
orig_stat = os.stat
class MinStat:
st_mode = -1
st_uid = -1
def _stat(path):
p_stat = orig_stat(path)
fake_stat = MinStat()
fake_stat.st_mode = p_stat.st_mode
return fake_stat
user_dir = tmpdir.join(getpass.getuser())
user_dir.ensure(dir=True)
user_path = str(user_dir)
# TODO: If we could guarantee access to the monkeypatch context
# function (i.e., 3.6.0 on), the call and assertion could be moved
# to a with block, such as:
#
# with monkeypatch.context() as m:
# m.setattr(os, 'stat', _stat)
# spack.stage.create_stage_root(user_path)
# assert os.stat(user_path).st_uid != os.getuid()
monkeypatch.setattr(os, 'stat', _stat)
spack.stage.create_stage_root(user_path)
# The following check depends on the patched os.stat as a poor
# substitute for confirming the generated warnings.
assert os.stat(user_path).st_uid != getuid()
def test_write_lock_timeout_with_multiple_readers_3_1_ranges(lock_path):
multiproc_test(AcquireRead(lock_path, 0, 5), AcquireRead(lock_path, 5, 5),
AcquireRead(lock_path, 10, 5),
TimeoutWrite(lock_path, 0, 15))
def test_write_lock_timeout_with_multiple_readers_3_2_ranges(lock_path):
multiproc_test(AcquireRead(lock_path, 0, 5), AcquireRead(lock_path, 5, 5),
AcquireRead(lock_path, 10,
5), TimeoutWrite(lock_path, 3, 10),
TimeoutWrite(lock_path, 5, 1))
@pytest.mark.skipif(getuid() == 0, reason='user is root')
def test_read_lock_on_read_only_lockfile(lock_dir, lock_path):
"""read-only directory, read-only lockfile."""
touch(lock_path)
with read_only(lock_path, lock_dir):
lock = lk.Lock(lock_path)
with lk.ReadTransaction(lock):
pass
with pytest.raises(lk.LockROFileError):
with lk.WriteTransaction(lock):
pass
def test_read_lock_read_only_dir_writable_lockfile(lock_dir, lock_path):
mutable_mock_repo,
_platform_executables,
tmpdir, monkeypatch):
"""The user runs 'spack external find'; the default path for storing
manifest files exists but is empty. Ensure that the command does not
fail.
"""
empty_manifest_dir = str(tmpdir.mkdir('manifest_dir'))
monkeypatch.setenv('PATH', '')
monkeypatch.setattr(spack.cray_manifest, 'default_path',
empty_manifest_dir)
external('find')
@pytest.mark.skipif(sys.platform == 'win32', reason="Can't chmod on Windows")
@pytest.mark.skipif(getuid() == 0, reason='user is root')
def test_find_external_manifest_with_bad_permissions(
mutable_config, working_env, mock_executable, mutable_mock_repo,
_platform_executables, tmpdir, monkeypatch):
"""The user runs 'spack external find'; the default path for storing
manifest files exists but with insufficient permissions. Check that
the command does not fail.
"""
test_manifest_dir = str(tmpdir.mkdir('manifest_dir'))
test_manifest_file_path = os.path.join(test_manifest_dir, 'badperms.json')
touch(test_manifest_file_path)
monkeypatch.setenv('PATH', '')
monkeypatch.setattr(spack.cray_manifest, 'default_path', test_manifest_dir)
try:
os.chmod(test_manifest_file_path, 0)
output = external('find')
class TestStage(object):
stage_name = 'spack-test-stage'
def test_setup_and_destroy_name_with_tmp(self, mock_stage_archive):
archive = mock_stage_archive()
with Stage(archive.url, name=self.stage_name) as stage:
check_setup(stage, self.stage_name, archive)
check_destroy(stage, self.stage_name)
def test_setup_and_destroy_name_without_tmp(self, mock_stage_archive):
archive = mock_stage_archive()
with Stage(archive.url, name=self.stage_name) as stage:
check_setup(stage, self.stage_name, archive)
check_destroy(stage, self.stage_name)
def test_setup_and_destroy_no_name_with_tmp(self, mock_stage_archive):
archive = mock_stage_archive()
with Stage(archive.url) as stage:
check_setup(stage, None, archive)
check_destroy(stage, None)
def test_noexpand_stage_file(self, mock_stage_archive,
mock_noexpand_resource):
"""When creating a stage with a nonexpanding URL, the 'archive_file'
property of the stage should refer to the path of that file.
"""
test_noexpand_fetcher = spack.fetch_strategy.from_kwargs(
url=_file_prefix + mock_noexpand_resource, expand=False)
with Stage(test_noexpand_fetcher) as stage:
stage.fetch()
stage.expand_archive()
assert os.path.exists(stage.archive_file)
@pytest.mark.disable_clean_stage_check
def test_composite_stage_with_noexpand_resource(self, mock_stage_archive,
mock_noexpand_resource):
archive = mock_stage_archive()
composite_stage = StageComposite()
root_stage = Stage(archive.url)
composite_stage.append(root_stage)
resource_dst_name = 'resource-dst-name.sh'
test_resource_fetcher = spack.fetch_strategy.from_kwargs(
url=_file_prefix + mock_noexpand_resource, expand=False)
test_resource = Resource('test_resource', test_resource_fetcher,
resource_dst_name, None)
resource_stage = ResourceStage(test_resource_fetcher, root_stage,
test_resource)
composite_stage.append(resource_stage)
composite_stage.create()
composite_stage.fetch()
composite_stage.expand_archive()
assert composite_stage.expanded # Archive is expanded
assert os.path.exists(
os.path.join(composite_stage.source_path, resource_dst_name))
@pytest.mark.disable_clean_stage_check
def test_composite_stage_with_expand_resource(
self, composite_stage_with_expanding_resource):
composite_stage, root_stage, resource_stage, mock_resource = (
composite_stage_with_expanding_resource)
composite_stage.create()
composite_stage.fetch()
composite_stage.expand_archive()
assert composite_stage.expanded # Archive is expanded
for fname in mock_resource.files:
file_path = os.path.join(root_stage.source_path, 'resource-dir',
fname)
assert os.path.exists(file_path)
# Perform a little cleanup
shutil.rmtree(root_stage.path)
@pytest.mark.disable_clean_stage_check
def test_composite_stage_with_expand_resource_default_placement(
self, composite_stage_with_expanding_resource):
"""For a resource which refers to a compressed archive which expands
to a directory, check that by default the resource is placed in
the source_path of the root stage with the name of the decompressed
directory.
"""
composite_stage, root_stage, resource_stage, mock_resource = (
composite_stage_with_expanding_resource)
resource_stage.resource.placement = None
composite_stage.create()
composite_stage.fetch()
composite_stage.expand_archive()
for fname in mock_resource.files:
file_path = os.path.join(root_stage.source_path, 'resource-expand',
fname)
assert os.path.exists(file_path)
# Perform a little cleanup
shutil.rmtree(root_stage.path)
def test_setup_and_destroy_no_name_without_tmp(self, mock_stage_archive):
archive = mock_stage_archive()
with Stage(archive.url) as stage:
check_setup(stage, None, archive)
check_destroy(stage, None)
@pytest.mark.parametrize('debug', [False, True])
def test_fetch(self, mock_stage_archive, debug):
archive = mock_stage_archive()
with spack.config.override('config:debug', debug):
with Stage(archive.url, name=self.stage_name) as stage:
stage.fetch()
check_setup(stage, self.stage_name, archive)
check_fetch(stage, self.stage_name)
check_destroy(stage, self.stage_name)
def test_no_search_if_default_succeeds(self, mock_stage_archive,
failing_search_fn):
archive = mock_stage_archive()
stage = Stage(archive.url,
name=self.stage_name,
search_fn=failing_search_fn)
with stage:
stage.fetch()
check_destroy(stage, self.stage_name)
def test_no_search_mirror_only(self, failing_fetch_strategy,
failing_search_fn):
stage = Stage(failing_fetch_strategy,
name=self.stage_name,
search_fn=failing_search_fn)
with stage:
try:
stage.fetch(mirror_only=True)
except spack.fetch_strategy.FetchError:
pass
check_destroy(stage, self.stage_name)
@pytest.mark.parametrize(
"err_msg,expected",
[('Fetch from fetch.test.com', 'Fetch from fetch.test.com'),
(None, 'All fetchers failed')])
def test_search_if_default_fails(self, failing_fetch_strategy, search_fn,
err_msg, expected):
stage = Stage(failing_fetch_strategy,
name=self.stage_name,
search_fn=search_fn)
with stage:
with pytest.raises(spack.fetch_strategy.FetchError,
match=expected):
stage.fetch(mirror_only=False, err_msg=err_msg)
check_destroy(stage, self.stage_name)
assert search_fn.performed_search
def test_ensure_one_stage_entry(self, mock_stage_archive):
archive = mock_stage_archive()
with Stage(archive.url, name=self.stage_name) as stage:
stage.fetch()
stage_path = get_stage_path(stage, self.stage_name)
spack.fetch_strategy._ensure_one_stage_entry(stage_path)
check_destroy(stage, self.stage_name)
@pytest.mark.parametrize(
"expected_file_list",
[[], [_include_readme], [_include_extra, _include_readme],
[_include_hidden, _include_readme]])
def test_expand_archive(self, expected_file_list, mock_stage_archive):
archive = mock_stage_archive(expected_file_list)
with Stage(archive.url, name=self.stage_name) as stage:
stage.fetch()
check_setup(stage, self.stage_name, archive)
check_fetch(stage, self.stage_name)
stage.expand_archive()
check_expand_archive(stage, self.stage_name, expected_file_list)
check_destroy(stage, self.stage_name)
def test_expand_archive_extra_expand(self, mock_stage_archive):
"""Test expand with an extra expand after expand (i.e., no-op)."""
archive = mock_stage_archive()
with Stage(archive.url, name=self.stage_name) as stage:
stage.fetch()
check_setup(stage, self.stage_name, archive)
check_fetch(stage, self.stage_name)
stage.expand_archive()
stage.fetcher.expand()
check_expand_archive(stage, self.stage_name, [_include_readme])
check_destroy(stage, self.stage_name)
def test_restage(self, mock_stage_archive):
archive = mock_stage_archive()
with Stage(archive.url, name=self.stage_name) as stage:
stage.fetch()
stage.expand_archive()
with working_dir(stage.source_path):
check_expand_archive(stage, self.stage_name, [_include_readme])
# Try to make a file in the old archive dir
with open('foobar', 'w') as file:
file.write("this file is to be destroyed.")
assert 'foobar' in os.listdir(stage.source_path)
# Make sure the file is not there after restage.
stage.restage()
check_fetch(stage, self.stage_name)
assert 'foobar' not in os.listdir(stage.source_path)
check_destroy(stage, self.stage_name)
def test_no_keep_without_exceptions(self, mock_stage_archive):
archive = mock_stage_archive()
stage = Stage(archive.url, name=self.stage_name, keep=False)
with stage:
pass
check_destroy(stage, self.stage_name)
@pytest.mark.disable_clean_stage_check
def test_keep_without_exceptions(self, mock_stage_archive):
archive = mock_stage_archive()
stage = Stage(archive.url, name=self.stage_name, keep=True)
with stage:
pass
path = get_stage_path(stage, self.stage_name)
assert os.path.isdir(path)
@pytest.mark.disable_clean_stage_check
def test_no_keep_with_exceptions(self, mock_stage_archive):
class ThisMustFailHere(Exception):
pass
archive = mock_stage_archive()
stage = Stage(archive.url, name=self.stage_name, keep=False)
try:
with stage:
raise ThisMustFailHere()
except ThisMustFailHere:
path = get_stage_path(stage, self.stage_name)
assert os.path.isdir(path)
@pytest.mark.disable_clean_stage_check
def test_keep_exceptions(self, mock_stage_archive):
class ThisMustFailHere(Exception):
pass
archive = mock_stage_archive()
stage = Stage(archive.url, name=self.stage_name, keep=True)
try:
with stage:
raise ThisMustFailHere()
except ThisMustFailHere:
path = get_stage_path(stage, self.stage_name)
assert os.path.isdir(path)
def test_source_path_available(self, mock_stage_archive):
"""Ensure source path available but does not exist on instantiation."""
archive = mock_stage_archive()
stage = Stage(archive.url, name=self.stage_name)
source_path = stage.source_path
assert source_path
assert source_path.endswith(spack.stage._source_path_subdir)
assert not os.path.exists(source_path)
@pytest.mark.skipif(sys.platform == 'win32',
reason="Not supported on Windows (yet)")
@pytest.mark.skipif(getuid() == 0, reason='user is root')
def test_first_accessible_path(self, tmpdir):
"""Test _first_accessible_path names."""
spack_dir = tmpdir.join('paths')
name = str(spack_dir)
files = [os.path.join(os.path.sep, 'no', 'such', 'path'), name]
# Ensure the tmpdir path is returned since the user should have access
path = spack.stage._first_accessible_path(files)
assert path == name
assert os.path.isdir(path)
check_stage_dir_perms(str(tmpdir), path)
# Ensure an existing path is returned
spack_subdir = spack_dir.join('existing').ensure(dir=True)
subdir = str(spack_subdir)
path = spack.stage._first_accessible_path([subdir])
assert path == subdir
# Ensure a path with a `$user` node has the right permissions
# for its subdirectories.
user = getpass.getuser()
user_dir = spack_dir.join(user, 'has', 'paths')
user_path = str(user_dir)
path = spack.stage._first_accessible_path([user_path])
assert path == user_path
check_stage_dir_perms(str(tmpdir), path)
# Cleanup
shutil.rmtree(str(name))
@pytest.mark.skipif(sys.platform == 'win32',
reason="Not supported on Windows (yet)")
def test_create_stage_root(self, tmpdir, no_path_access):
"""Test create_stage_root permissions."""
test_dir = tmpdir.join('path')
test_path = str(test_dir)
try:
if getpass.getuser() in str(test_path).split(os.sep):
# Simply ensure directory created if tmpdir includes user
spack.stage.create_stage_root(test_path)
assert os.path.exists(test_path)
p_stat = os.stat(test_path)
assert p_stat.st_mode & stat.S_IRWXU == stat.S_IRWXU
else:
# Ensure an OS Error is raised on created, non-user directory
with pytest.raises(OSError) as exc_info:
spack.stage.create_stage_root(test_path)
assert exc_info.value.errno == errno.EACCES
finally:
try:
shutil.rmtree(test_path)
except OSError:
pass
@pytest.mark.nomockstage
def test_create_stage_root_bad_uid(self, tmpdir, monkeypatch):
"""
Test the code path that uses an existing user path -- whether `$user`
in `$tempdir` or not -- and triggers the generation of the UID
mismatch warning.
This situation can happen with some `config:build_stage` settings
for teams using a common service account for installing software.
"""
orig_stat = os.stat
class MinStat:
st_mode = -1
st_uid = -1
def _stat(path):
p_stat = orig_stat(path)
fake_stat = MinStat()
fake_stat.st_mode = p_stat.st_mode
return fake_stat
user_dir = tmpdir.join(getpass.getuser())
user_dir.ensure(dir=True)
user_path = str(user_dir)
# TODO: If we could guarantee access to the monkeypatch context
# function (i.e., 3.6.0 on), the call and assertion could be moved
# to a with block, such as:
#
# with monkeypatch.context() as m:
# m.setattr(os, 'stat', _stat)
# spack.stage.create_stage_root(user_path)
# assert os.stat(user_path).st_uid != os.getuid()
monkeypatch.setattr(os, 'stat', _stat)
spack.stage.create_stage_root(user_path)
# The following check depends on the patched os.stat as a poor
# substitute for confirming the generated warnings.
assert os.stat(user_path).st_uid != getuid()
def test_resolve_paths(self):
"""Test _resolve_paths."""
assert spack.stage._resolve_paths([]) == []
# resolved path without user appends user
paths = [os.path.join(os.path.sep, 'a', 'b', 'c')]
user = getpass.getuser()
can_paths = [os.path.join(paths[0], user)]
assert spack.stage._resolve_paths(paths) == can_paths
# resolved path with node including user does not append user
paths = [os.path.join(os.path.sep, 'spack-{0}'.format(user), 'stage')]
assert spack.stage._resolve_paths(paths) == paths
tempdir = '$tempdir'
can_tempdir = canonicalize_path(tempdir)
user = getpass.getuser()
temp_has_user = user in can_tempdir.split(os.sep)
paths = [
os.path.join(tempdir, 'stage'),
os.path.join(tempdir, '$user'),
os.path.join(tempdir, '$user', '$user'),
os.path.join(tempdir, '$user', 'stage', '$user')
]
res_paths = [canonicalize_path(p) for p in paths]
if temp_has_user:
res_paths[1] = can_tempdir
res_paths[2] = os.path.join(can_tempdir, user)
res_paths[3] = os.path.join(can_tempdir, 'stage', user)
else:
res_paths[0] = os.path.join(res_paths[0], user)
assert spack.stage._resolve_paths(paths) == res_paths
@pytest.mark.skipif(sys.platform == 'win32',
reason="Not supported on Windows (yet)")
@pytest.mark.skipif(getuid() == 0, reason='user is root')
def test_get_stage_root_bad_path(self, clear_stage_root):
"""Ensure an invalid stage path root raises a StageError."""
with spack.config.override('config:build_stage', '/no/such/path'):
with pytest.raises(spack.stage.StageError,
match="No accessible stage paths in"):
spack.stage.get_stage_root()
# Make sure the cached stage path values are unchanged.
assert spack.stage._stage_root is None
@pytest.mark.parametrize(
'path,purged', [('spack-stage-1234567890abcdef1234567890abcdef', True),
('spack-stage-anything-goes-here', True),
('stage-spack', False)])
def test_stage_purge(self, tmpdir, clear_stage_root, path, purged):
"""Test purging of stage directories."""
stage_dir = tmpdir.join('stage')
stage_path = str(stage_dir)
test_dir = stage_dir.join(path)
test_dir.ensure(dir=True)
test_path = str(test_dir)
with spack.config.override('config:build_stage', stage_path):
stage_root = spack.stage.get_stage_root()
assert stage_path == stage_root
spack.stage.purge()
if purged:
assert not os.path.exists(test_path)
else:
assert os.path.exists(test_path)
shutil.rmtree(test_path)
def test_stage_constructor_no_fetcher(self):
"""Ensure Stage constructor with no URL or fetch strategy fails."""
with pytest.raises(ValueError):
with Stage(None):
pass
def test_stage_constructor_with_path(self, tmpdir):
"""Ensure Stage constructor with a path uses it."""
testpath = str(tmpdir)
with Stage('file:///does-not-exist', path=testpath) as stage:
assert stage.path == testpath
def test_diystage_path_none(self):
"""Ensure DIYStage for path=None behaves as expected."""
with pytest.raises(ValueError):
DIYStage(None)
def test_diystage_path_invalid(self):
"""Ensure DIYStage for an invalid path behaves as expected."""
with pytest.raises(spack.stage.StagePathError):
DIYStage('/path/does/not/exist')
def test_diystage_path_valid(self, tmpdir):
"""Ensure DIYStage for a valid path behaves as expected."""
path = str(tmpdir)
stage = DIYStage(path)
assert stage.path == path
assert stage.source_path == path
# Order doesn't really matter for DIYStage since they are
# basically NOOPs; however, call each since they are part
# of the normal stage usage and to ensure full test coverage.
stage.create() # Only sets the flag value
assert stage.created
stage.cache_local() # Only outputs a message
stage.fetch() # Only outputs a message
stage.check() # Only outputs a message
stage.expand_archive() # Only outputs a message
assert stage.expanded # The path/source_path does exist
with pytest.raises(spack.stage.RestageError):
stage.restage()
stage.destroy() # A no-op
assert stage.path == path # Ensure can still access attributes
assert os.path.exists(stage.source_path) # Ensure path still exists
def test_diystage_preserve_file(self, tmpdir):
"""Ensure DIYStage preserves an existing file."""
# Write a file to the temporary directory
fn = tmpdir.join(_readme_fn)
fn.write(_readme_contents)
# Instantiate the DIYStage and ensure the above file is unchanged.
path = str(tmpdir)
stage = DIYStage(path)
assert os.path.isdir(path)
assert os.path.isfile(str(fn))
stage.create() # Only sets the flag value
readmefn = str(fn)
assert os.path.isfile(readmefn)
with open(readmefn) as _file:
_file.read() == _readme_contents
