def _find_root_path(path):
candidates = imap(lambda x: x.join(".farmfs"), path.parents())
matches = ifilter(lambda x: x.isdir(), candidates)
root = next(take(1)(matches), None)
if root:
nested_root = next(take(1)(matches), None)
if nested_root:
raise ValueError("Farmfs volumes cannot be nested")
return root.parent()
else:
raise ValueError("Volume not found: %s" % path)
def test_pipeline():
identity_pipeline = pipeline()
assert isinstance(identity_pipeline([1, 2, 3]),
Iterator), "identity_pipeline should be an iterator"
assert list(identity_pipeline([1, 2, 3])) == [1, 2, 3]
inc_pipeline = pipeline(fmap(inc))
assert isinstance(inc_pipeline([1, 2, 3]),
Iterator), "inc_pipeline should be an iterator."
assert list(inc_pipeline([1, 2, 3])) == [2, 3, 4]
inc_list_pipeline = pipeline(fmap(inc), list)
assert isinstance(inc_list_pipeline([1, 2, 3]),
list), "inc_list_pipeline should return a list"
assert inc_list_pipeline([1, 2, 3]) == [2, 3, 4]
range_pipeline = pipeline(irange, even_list, take(3), list)
assert range_pipeline(0, 1) == [0, 2, 4]
def test_irange():
assert list(take(3)(irange(0, 1))) == [0, 1, 2]
assert list(take(3)(irange(0, -1))) == [0, -1, -2]
def test_take():
assert list(take(3)([1, 2, 3, 4, 5])) == [1, 2, 3]
assert list(take(3)([1, 2])) == [1, 2]
