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from __future__ import with_statement
from rpython.tool.udir import udir
class AppTestIoModule:
spaceconfig = dict(usemodules=['_io'])
def test_import(self):
import io
def test_iobase(self):
import io
io.IOBase()
class MyFile(io.BufferedIOBase):
def __init__(self, filename):
pass
MyFile("file")
def test_openclose(self):
import io
with io.BufferedIOBase() as f:
assert not f.closed
f._checkClosed()
assert f.closed
raises(ValueError, f._checkClosed)
def test_iter(self):
import io
class MyFile(io.IOBase):
def __init__(self):
self.lineno = 0
def readline(self):
self.lineno += 1
if self.lineno == 1:
return "line1"
elif self.lineno == 2:
return "line2"
return ""
assert list(MyFile()) == ["line1", "line2"]
def test_exception(self):
import _io
e = _io.UnsupportedOperation("seek")
def test_default_implementations(self):
import _io
file = _io._IOBase()
raises(_io.UnsupportedOperation, file.seek, 0, 1)
raises(_io.UnsupportedOperation, file.fileno)
raises(_io.UnsupportedOperation, file.truncate)
def test_blockingerror(self):
import _io
try:
raise _io.BlockingIOError(42, "test blocking", 123)
except OSError as e:
assert isinstance(e, _io.BlockingIOError)
assert e.errno == 42
assert e.strerror == "test blocking"
assert e.characters_written == 123
def test_dict(self):
import _io
f = _io.BytesIO()
f.x = 42
assert f.x == 42
#
def write(data):
try:
data = data.tobytes().upper()
except AttributeError:
data = data.upper()
return _io.BytesIO.write(f, data)
f.write = write
bufio = _io.BufferedWriter(f)
bufio.write(b"abc")
bufio.flush()
assert f.getvalue() == b"ABC"
def test_destructor_1(self):
import io
io.IOBase()
record = []
class MyIO(io.IOBase):
def __del__(self):
record.append(1)
# doesn't call the inherited __del__, so file not closed
def close(self):
record.append(2)
super(MyIO, self).close()
def flush(self):
record.append(3)
super(MyIO, self).flush()
MyIO()
import gc; gc.collect()
assert record == [1]
def test_destructor_2(self):
import io
io.IOBase()
record = []
class MyIO(io.IOBase):
def __del__(self):
record.append(1)
super(MyIO, self).__del__()
def close(self):
record.append(2)
super(MyIO, self).close()
def flush(self):
record.append(3)
super(MyIO, self).flush()
MyIO()
import gc; gc.collect()
assert record == [1, 2, 3]
def test_tell(self):
import io
class MyIO(io.IOBase):
def seek(self, pos, whence=0):
return 42
assert MyIO().tell() == 42
def test_weakref(self):
import _io
import weakref
f = _io.BytesIO()
ref = weakref.ref(f)
assert ref() is f
def test_rawio_read(self):
import _io
class MockRawIO(_io._RawIOBase):
stack = [b'abc', b'de', b'']
def readinto(self, buf):
data = self.stack.pop(0)
buf[:len(data)] = data
return len(data)
assert MockRawIO().read() == b'abcde'
def test_rawio_read_pieces(self):
import _io
class MockRawIO(_io._RawIOBase):
stack = [b'abc', b'de', None, b'fg', b'']
def readinto(self, buf):
data = self.stack.pop(0)
if data is None:
return None
if len(data) <= len(buf):
buf[:len(data)] = data
return len(data)
else:
buf[:] = data[:len(buf)]
self.stack.insert(0, data[len(buf):])
return len(buf)
r = MockRawIO()
assert r.read(2) == b'ab'
assert r.read(2) == b'c'
assert r.read(2) == b'de'
assert r.read(2) is None
assert r.read(2) == b'fg'
assert r.read(2) == b''
def test_rawio_readall_none(self):
import _io
class MockRawIO(_io._RawIOBase):
read_stack = [None, None, b"a"]
def readinto(self, buf):
v = self.read_stack.pop()
if v is None:
return v
buf[:len(v)] = v
return len(v)
r = MockRawIO()
s = r.readall()
assert s == b"a"
s = r.readall()
assert s is None
class AppTestOpen:
spaceconfig = dict(usemodules=['_io', '_locale', 'array', 'struct'])
def setup_class(cls):
tmpfile = udir.join('tmpfile').ensure()
cls.w_tmpfile = cls.space.wrap(str(tmpfile))
def test_open(self):
import io
f = io.open(self.tmpfile, "rb")
assert f.name.endswith('tmpfile')
assert f.mode == 'rb'
f.close()
with io.open(self.tmpfile, "rt") as f:
assert f.mode == "rt"
def test_open_writable(self):
import io
f = io.open(self.tmpfile, "w+b")
f.close()
def test_valid_mode(self):
import io
raises(ValueError, io.open, self.tmpfile, "ww")
raises(ValueError, io.open, self.tmpfile, "rwa")
raises(ValueError, io.open, self.tmpfile, "b", newline="\n")
def test_array_write(self):
import _io, array
a = array.array('i', range(10))
n = len(a.tostring())
with _io.open(self.tmpfile, "wb", 0) as f:
res = f.write(a)
assert res == n
with _io.open(self.tmpfile, "wb") as f:
res = f.write(a)
assert res == n
def test_attributes(self):
import _io
import warnings
with _io.open(self.tmpfile, "wb", buffering=0) as f:
assert f.mode == "wb"
with warnings.catch_warnings(record=True) as l:
warnings.simplefilter("always")
with _io.open(self.tmpfile, "U") as f:
assert f.name == self.tmpfile
assert f.buffer.name == self.tmpfile
assert f.buffer.raw.name == self.tmpfile
assert f.mode == "U"
assert f.buffer.mode == "rb"
assert f.buffer.raw.mode == "rb"
assert isinstance(l[0].message, DeprecationWarning)
with _io.open(self.tmpfile, "w+") as f:
assert f.mode == "w+"
assert f.buffer.mode == "rb+"
assert f.buffer.raw.mode == "rb+"
with _io.open(f.fileno(), "wb", closefd=False) as g:
assert g.mode == "wb"
assert g.raw.mode == "wb"
assert g.name == f.fileno()
assert g.raw.name == f.fileno()
def test_opener(self):
import _io, os
with _io.open(self.tmpfile, "w") as f:
f.write("egg\n")
fd = os.open(self.tmpfile, os.O_RDONLY)
def opener(path, flags):
return fd
with _io.open("non-existent", "r", opener=opener) as f:
assert f.read() == "egg\n"
def test_seek_and_tell(self):
import _io
with _io.open(self.tmpfile, "wb") as f:
f.write(b"abcd")
with _io.open(self.tmpfile) as f:
decoded = f.read()
# seek positions
for i in range(len(decoded) + 1):
# read lenghts
for j in [1, 5, len(decoded) - i]:
with _io.open(self.tmpfile) as f:
res = f.read(i)
assert res == decoded[:i]
cookie = f.tell()
res = f.read(j)
assert res == decoded[i:i + j]
f.seek(cookie)
res = f.read()
assert res == decoded[i:]
def test_telling(self):
import _io
with _io.open(self.tmpfile, "w+", encoding="utf8") as f:
p0 = f.tell()
f.write("\xff\n")
p1 = f.tell()
f.write("\xff\n")
p2 = f.tell()
f.seek(0)
assert f.tell() == p0
res = f.readline()
assert res == "\xff\n"
assert f.tell() == p1
res = f.readline()
assert res == "\xff\n"
assert f.tell() == p2
f.seek(0)
for line in f:
assert line == "\xff\n"
raises(IOError, f.tell)
assert f.tell() == p2
def test_chunk_size(self):
import _io
with _io.open(self.tmpfile) as f:
assert f._CHUNK_SIZE >= 1
f._CHUNK_SIZE = 4096
assert f._CHUNK_SIZE == 4096
raises(ValueError, setattr, f, "_CHUNK_SIZE", 0)
def test_truncate(self):
import _io
with _io.open(self.tmpfile, "w+") as f:
f.write("abc")
with _io.open(self.tmpfile, "w+") as f:
f.truncate()
with _io.open(self.tmpfile, "r+") as f:
res = f.read()
assert res == ""
def test_errors_property(self):
import _io
with _io.open(self.tmpfile, "w") as f:
assert f.errors == "strict"
with _io.open(self.tmpfile, "w", errors="replace") as f:
assert f.errors == "replace"
def test_append_bom(self):
import _io
# The BOM is not written again when appending to a non-empty file
for charset in ["utf-8-sig", "utf-16", "utf-32"]:
with _io.open(self.tmpfile, "w", encoding=charset) as f:
f.write("aaa")
pos = f.tell()
with _io.open(self.tmpfile, "rb") as f:
res = f.read()
assert res == "aaa".encode(charset)
with _io.open(self.tmpfile, "a", encoding=charset) as f:
f.write("xxx")
with _io.open(self.tmpfile, "rb") as f:
res = f.read()
assert res == "aaaxxx".encode(charset)
def test_newlines_attr(self):
import _io
with _io.open(self.tmpfile, "r") as f:
assert f.newlines is None
with _io.open(self.tmpfile, "wb") as f:
f.write(b"hello\nworld\n")
with _io.open(self.tmpfile, "r") as f:
res = f.readline()
assert res == "hello\n"
res = f.readline()
assert res == "world\n"
assert f.newlines == "\n"
assert type(f.newlines) is str
def w__check_warn_on_dealloc(self, *args, **kwargs):
import gc
import warnings
f = open(*args, **kwargs)
r = repr(f)
gc.collect()
with warnings.catch_warnings(record=True) as w:
warnings.simplefilter('always')
f = None
gc.collect()
assert len(w) == 1, len(w)
assert r in str(w[0])
def test_warn_on_dealloc(self):
self._check_warn_on_dealloc(self.tmpfile, 'wb', buffering=0)
self._check_warn_on_dealloc(self.tmpfile, 'wb')
self._check_warn_on_dealloc(self.tmpfile, 'w')
def test_pickling(self):
import _io
import pickle
# Pickling file objects is forbidden
for kwargs in [
{"mode": "w"},
{"mode": "wb"},
{"mode": "wb", "buffering": 0},
{"mode": "r"},
{"mode": "rb"},
{"mode": "rb", "buffering": 0},
{"mode": "w+"},
{"mode": "w+b"},
{"mode": "w+b", "buffering": 0},
]:
for protocol in range(pickle.HIGHEST_PROTOCOL + 1):
with _io.open(self.tmpfile, **kwargs) as f:
raises(TypeError, pickle.dumps, f, protocol)
def test_mod(self):
import _io
typemods = dict((t, t.__module__) for name, t in vars(_io).items()
if isinstance(t, type) and name != '__loader__')
for t, mod in typemods.items():
if t is _io.BlockingIOError:
assert mod == 'builtins'
elif t is _io.UnsupportedOperation:
assert mod == 'io'
else:
assert mod == '_io'
def test_issue1902(self):
import _io
with _io.open(self.tmpfile, 'w+b', 4096) as f:
f.write(b'\xff' * 13569)
f.flush()
f.seek(0, 0)
f.read(1)
f.seek(-1, 1)
f.write(b'')
def test_issue1902_2(self):
import _io
with _io.open(self.tmpfile, 'w+b', 4096) as f:
f.write(b'\xff' * 13569)
f.flush()
f.seek(0, 0)
f.read(1)
f.seek(-1, 1)
f.write(b'\xff')
f.seek(1, 0)
f.read(4123)
f.seek(-4123, 1)
def test_issue1902_3(self):
import _io
buffer_size = 4096
with _io.open(self.tmpfile, 'w+b', buffer_size) as f:
f.write(b'\xff' * buffer_size * 3)
f.flush()
f.seek(0, 0)
f.read(1)
f.seek(-1, 1)
f.write(b'\xff')
f.seek(1, 0)
f.read(buffer_size * 2)
assert f.tell() == 1 + buffer_size * 2
def test_open_exclusive(self):
# XXX: should raise FileExistsError
FileExistsError = OSError
import _io
filename = self.tmpfile + '_x2'
raises(ValueError, _io.open, filename, 'xw')
with _io.open(filename, 'x') as f:
assert f.mode == 'x'
raises(FileExistsError, _io.open, filename, 'x')
def test_nonbuffered_textio(self):
import warnings, _io as io
filename = self.tmpfile + '_x2'
warnings.simplefilter("always", category=ResourceWarning)
with warnings.catch_warnings(record=True) as recorded:
raises(ValueError, io.open, filename, 'w', buffering=0)
assert recorded == []
def test_invalid_newline(self):
import warnings, _io as io
filename = self.tmpfile + '_x2'
warnings.simplefilter("always", category=ResourceWarning)
with warnings.catch_warnings(record=True) as recorded:
raises(ValueError, io.open, filename, 'w', newline='invalid')
assert recorded == []
class AppTestIoAferClose:
spaceconfig = dict(usemodules=['_io'])
def setup_class(cls):
tmpfile = udir.join('tmpfile').ensure()
cls.w_tmpfile = cls.space.wrap(str(tmpfile))
def test_io_after_close(self):
import _io
for kwargs in [
{"mode": "w"},
{"mode": "wb"},
{"mode": "w", "buffering": 1},
{"mode": "w", "buffering": 2},
{"mode": "wb", "buffering": 0},
{"mode": "r"},
{"mode": "rb"},
{"mode": "r", "buffering": 1},
{"mode": "r", "buffering": 2},
{"mode": "rb", "buffering": 0},
{"mode": "w+"},
{"mode": "w+b"},
{"mode": "w+", "buffering": 1},
{"mode": "w+", "buffering": 2},
{"mode": "w+b", "buffering": 0},
]:
if "b" not in kwargs["mode"]:
kwargs["encoding"] = "ascii"
f = _io.open(self.tmpfile, **kwargs)
f.close()
raises(ValueError, f.flush)
raises(ValueError, f.fileno)
raises(ValueError, f.isatty)
raises(ValueError, f.__iter__)
if hasattr(f, "peek"):
raises(ValueError, f.peek, 1)
raises(ValueError, f.read)
if hasattr(f, "read1"):
raises(ValueError, f.read1, 1024)
if hasattr(f, "readall"):
raises(ValueError, f.readall)
if hasattr(f, "readinto"):
raises(ValueError, f.readinto, bytearray(1024))
raises(ValueError, f.readline)
raises(ValueError, f.readlines)
raises(ValueError, f.seek, 0)
raises(ValueError, f.tell)
raises(ValueError, f.truncate)
raises(ValueError, f.write, b"" if "b" in kwargs['mode'] else u"")
raises(ValueError, f.writelines, [])
raises(ValueError, next, f)
|
