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from functools import partial
import pytest
from snakeoil import compression, data_source
class TestDataSource:
supports_mutable = True
@pytest.fixture(autouse=True)
def _setup(self, tmp_path):
self.dir = tmp_path
def get_obj(self, data="foonani", mutable=False):
return data_source.data_source(data, mutable=mutable)
def _test_fileobj_ro(self, attr, converter=str):
obj = self.get_obj()
# ensure that requesting mutable from an immutable isn't allowed
with pytest.raises(TypeError):
getattr(obj, attr)(True)
with getattr(obj, attr)() as handle:
assert handle.read() == converter("foonani")
with pytest.raises(handle.exceptions):
handle.write(converter("monkey"))
def _test_fileobj_wr(self, attr, converter=str):
obj = self.get_obj(mutable=True)
handle_f = getattr(obj, attr)
with handle_f() as f:
assert f.read() == converter("foonani")
with handle_f(True) as f:
f.write(converter("dar"))
with handle_f(True) as f:
assert f.read() == converter("darnani")
def test_text_fileobj(self):
self._test_fileobj_ro("text_fileobj", str)
if self.supports_mutable:
self._test_fileobj_wr("text_fileobj", str)
def test_bytes_fileobj(self):
self._test_fileobj_ro("bytes_fileobj", lambda s: s.encode())
if self.supports_mutable:
self._test_fileobj_wr("bytes_fileobj", lambda s: s.encode())
def assertContents(self, reader, writer):
with reader.bytes_fileobj() as reader_f:
reader_data = reader_f.read()
with writer.bytes_fileobj() as writer_f:
writer_data = writer_f.read()
assert reader_data == writer_data
def _mk_data(self, size=(100000)):
return "".join(str(x % 10) for x in range(size))
def test_transfer_to_data_source(self):
data = self._mk_data()
reader = self.get_obj(data=data)
if self.supports_mutable:
writer = self.get_obj(data="", mutable=True)
else:
writer = data_source.data_source("", mutable=True)
reader.transfer_to_data_source(writer)
self.assertContents(reader, writer)
def test_transfer_to_path(self, tmp_path):
data = self._mk_data()
reader = self.get_obj(data=data)
if isinstance(reader, data_source.bz2_source):
writer = data_source.bz2_source(tmp_path / "transfer_to_path", mutable=True)
else:
writer = data_source.local_source(
tmp_path / "transfer_to_path", mutable=True
)
reader.transfer_to_path(writer.path)
self.assertContents(reader, writer)
def test_transfer_data_between_files(self):
data = self._mk_data()
reader = self.get_obj(data=data)
if self.supports_mutable:
writer = self.get_obj(data="", mutable=True)
else:
writer = data_source.data_source("", mutable=True)
with reader.bytes_fileobj() as reader_f, writer.bytes_fileobj(True) as writer_f:
data_source.transfer_between_files(reader_f, writer_f)
self.assertContents(reader, writer)
class TestLocalSource(TestDataSource):
def get_obj(self, data="foonani", mutable=False, test_creation=False):
self.fp = self.dir / "localsource.test"
if not test_creation:
mode = None
if isinstance(data, bytes):
mode = "wb"
elif mode is None:
mode = "w"
with open(self.fp, mode) as f:
f.write(data)
return data_source.local_source(self.fp, mutable=mutable)
def test_bytes_fileobj(self):
data = b"foonani\xf2"
obj = self.get_obj(data=data)
# this will blow up if tries to ascii decode it.
with obj.bytes_fileobj() as f:
assert f.read() == data
def test_bytes_fileobj_create(self):
data = b"foonani\xf2"
obj = self.get_obj(test_creation=True, mutable=True)
# this will blow up if tries to ascii decode it.
with obj.bytes_fileobj(True) as f:
assert f.read() == b""
f.write(data)
with obj.bytes_fileobj() as f:
assert f.read() == data
class TestBz2Source(TestDataSource):
def get_obj(self, data="foonani", mutable=False, test_creation=False):
self.fp = self.dir / "bz2source.test.bz2"
if not test_creation:
if isinstance(data, str):
data = data.encode()
with open(self.fp, "wb") as f:
f.write(compression.compress_data("bzip2", data))
return data_source.bz2_source(self.fp, mutable=mutable)
def test_bytes_fileobj(self):
data = b"foonani\xf2"
obj = self.get_obj(data=data)
# this will blow up if tries to ascii decode it.
with obj.bytes_fileobj() as f:
assert f.read() == data
class Test_invokable_data_source(TestDataSource):
supports_mutable = False
def get_obj(self, data="foonani", mutable=False):
if isinstance(data, str):
data = data.encode("utf8")
return data_source.invokable_data_source(partial(self._get_data, data))
@staticmethod
def _get_data(data, is_text=False):
if is_text:
data = data.decode("utf8")
return data_source.text_ro_StringIO(data)
return data_source.bytes_ro_StringIO(data)
class Test_invokable_data_source_wrapper_text(Test_invokable_data_source):
supports_mutable = False
text_mode = True
def get_obj(self, mutable=False, data="foonani"):
return data_source.invokable_data_source.wrap_function(
partial(self._get_data, data), self.text_mode
)
def _get_data(self, data="foonani"):
if isinstance(data, str):
if not self.text_mode:
return data.encode("utf8")
elif self.text_mode:
return data.encode("utf8")
return data
class Test_invokable_data_source_wrapper_bytes(Test_invokable_data_source_wrapper_text):
text_mode = False
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