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import unittest
import io
class FileBasedBufferTests(object):
def test_seekable(self):
inst = self._makeOneFromBytes()
self.assertTrue(inst.seekable)
self.assertEqual(inst.remaining, 0)
def test___bool__(self):
inst = self._makeOneFromBytes()
inst.remaining = 10
self.assertEqual(bool(inst), True)
inst.remaining = 0
self.assertEqual(bool(inst), False)
inst.remaining = -1
self.assertEqual(bool(inst), True)
def test_append(self):
inst = self._makeOneFromBytes(b'data')
inst.append(b'data2')
self.assertEqual(inst.remaining, 9)
self.assertEqual(inst.read(), b'datadata2')
self.assertEqual(inst.remaining, 0)
def test_read_zero(self):
inst = self._makeOneFromBytes(b'data')
result = inst.read(0)
self.assertEqual(result, b'')
self.assertEqual(inst.remaining, 4)
def test_read_all(self):
inst = self._makeOneFromBytes(b'data')
result = inst.read()
self.assertEqual(result, b'data')
self.assertEqual(inst.remaining, 0)
def test_read_not_enough(self):
inst = self._makeOneFromBytes(b'data')
result = inst.read(3)
self.assertEqual(result, b'dat')
self.assertEqual(inst.remaining, 1)
def test_read_exact(self):
inst = self._makeOneFromBytes(b'data')
result = inst.read(4)
self.assertEqual(result, b'data')
self.assertEqual(inst.remaining, 0)
def test_read_too_much(self):
inst = self._makeOneFromBytes(b'data')
result = inst.read(100)
self.assertEqual(result, b'data')
self.assertEqual(inst.remaining, 0)
def test_rollback(self):
inst = self._makeOneFromBytes(b'data')
self.assertEqual(inst.remaining, 4)
result = inst.read(3)
self.assertEqual(inst.remaining, 1)
self.assertEqual(result, b'dat')
inst.rollback(len(result))
self.assertEqual(inst.remaining, 4)
result = inst.read()
self.assertEqual(inst.remaining, 0)
self.assertEqual(result, b'data')
def test_close(self):
inst = self._makeOneFromBytes()
inst.close()
self.assertEqual(inst.remaining, 0)
class TestTempfileBasedBuffer(FileBasedBufferTests, unittest.TestCase):
def _makeOne(self, from_buffer=None):
from waitress.buffers import TempfileBasedBuffer
buffer = TempfileBasedBuffer(from_buffer=from_buffer)
self.buffers.append(buffer)
return buffer
def _makeOneFromBytes(self, from_bytes=None):
return self._makeOne(from_buffer=io.BytesIO(from_bytes))
def setUp(self):
self.buffers = []
def tearDown(self):
for b in self.buffers:
b.close()
class TestBytesIOBasedBuffer(FileBasedBufferTests, unittest.TestCase):
def _makeOne(self, from_bytes=None):
from waitress.buffers import BytesIOBasedBuffer
return BytesIOBasedBuffer(from_bytes)
_makeOneFromBytes = _makeOne
class TestReadOnlyFileBasedBuffer(FileBasedBufferTests, unittest.TestCase):
def _makeOne(self, file, block_size=32768):
from waitress.buffers import ReadOnlyFileBasedBuffer
buffer = ReadOnlyFileBasedBuffer(file, block_size)
self.buffers.append(buffer)
return buffer
def _makeOneFromBytes(self, from_bytes=None):
buffer = self._makeOne(io.BytesIO(from_bytes))
buffer.prepare()
return buffer
def setUp(self):
self.buffers = []
def tearDown(self):
for b in self.buffers:
b.close()
def test_append(self): # overrides FileBasedBufferTests.test_append
inst = self._makeOneFromBytes()
self.assertRaises(NotImplementedError, inst.append, 'a')
def test_prepare_unseekable(self):
f = KindaFilelike(b'abc')
inst = self._makeOne(f)
result = inst.prepare()
self.assertEqual(result, -1)
self.assertFalse(inst.seekable)
self.assertEqual(inst.remaining, -1)
def test_prepare_seekable(self):
f = Filelike(b'abc', tellresults=[0, 10])
inst = self._makeOne(f)
result = inst.prepare()
self.assertEqual(result, 10)
self.assertTrue(inst.seekable)
self.assertEqual(inst.remaining, 10)
self.assertEqual(inst.file.seeked, 0)
def test_prepare_maxsize_lt_len(self):
f = Filelike(b'abc', tellresults=[0, 10])
inst = self._makeOne(f)
result = inst.prepare(3)
self.assertEqual(result, 3)
self.assertEqual(inst.remaining, 3)
self.assertTrue(inst.seekable)
def test_prepare_maxsize_gt_len(self):
f = Filelike(b'abc', tellresults=[3, 10])
inst = self._makeOne(f)
result = inst.prepare(15)
self.assertEqual(result, 7)
self.assertEqual(inst.remaining, 7)
self.assertTrue(inst.seekable)
def test_read_numbytes_neg_one(self):
f = io.BytesIO(b'abcdef')
f.seek(4)
inst = self._makeOne(f)
inst.prepare()
self.assertEqual(inst.remaining, 2)
result = inst.read(-1)
self.assertEqual(result, b'ef')
self.assertEqual(inst.remaining, 0)
self.assertEqual(f.tell(), 6)
def test_get_numbytes_gt_remain(self):
f = io.BytesIO(b'abcdef')
inst = self._makeOne(f)
inst.remaining = 2
result = inst.read(3)
self.assertEqual(result, b'ab')
self.assertEqual(inst.remaining, 0)
self.assertEqual(f.tell(), 2)
def test_get_numbytes_lt_remain(self):
f = io.BytesIO(b'abcdef')
inst = self._makeOne(f)
inst.remaining = 2
result = inst.read(1)
self.assertEqual(result, b'a')
self.assertEqual(inst.remaining, 1)
self.assertEqual(f.tell(), 1)
def test___iter__(self):
data = b'a' * 10000
f = io.BytesIO(data)
inst = self._makeOne(f)
r = b''
for val in inst:
r += val
self.assertEqual(r, data)
def test_unseekable_updates_remaining_at_eof(self):
f = io.BytesIO(b'abcdef')
inst = self._makeOne(f)
inst.remaining = -1
result1 = inst.read()
result2 = inst.read()
self.assertEqual(result1, b'abcdef')
self.assertEqual(result2, b'')
self.assertEqual(inst.remaining, 0)
class TestOverflowableBuffer(FileBasedBufferTests, unittest.TestCase):
def _makeOne(self, overflow=10):
from waitress.buffers import OverflowableBuffer
buffer = OverflowableBuffer(overflow)
self.buffers.append(buffer)
return buffer
def _makeOneFromBytes(self, from_bytes=None):
buffer = self._makeOne()
if from_bytes:
buffer.append(from_bytes)
return buffer
def setUp(self):
self.buffers = []
def tearDown(self):
for b in self.buffers:
b.close()
def test_append_with_len_more_than_max_int(self):
from waitress.compat import MAXINT
inst = self._makeOne()
inst.overflowed = True
buf = DummyBuffer(length=MAXINT)
inst.buf = buf
inst.remaining = MAXINT
result = inst.append(b'x')
# we don't want this to throw an OverflowError on Python 2 (see
# https://github.com/Pylons/waitress/issues/47)
self.assertEqual(result, None)
def test_append_buf_None_not_longer_than_strbuf_limit(self):
inst = self._makeOne()
inst.strbuf = b'x' * 5
inst.remaining = len(inst.strbuf)
inst.append(b'hello')
self.assertEqual(inst.strbuf, b'xxxxxhello')
self.assertEqual(inst.remaining, 10)
def test_append_buf_None_longer_than_strbuf_limit(self):
inst = self._makeOne(10000)
inst.strbuf = b'x' * 8192
inst.remaining = len(inst.strbuf)
inst.append(b'hello')
self.assertEqual(inst.strbuf, b'')
self.assertEqual(inst.buf.remaining, 8197)
def test_append_overflow(self):
inst = self._makeOne(10)
inst.strbuf = b'x' * 8192
inst.remaining = len(inst.strbuf)
inst.append(b'hello')
self.assertEqual(inst.strbuf, b'')
self.assertEqual(inst.buf.remaining, 8197)
def test_append_sz_gt_overflow(self):
from waitress.buffers import BytesIOBasedBuffer
inst = self._makeOne()
buf = BytesIOBasedBuffer()
inst.buf = buf
inst.overflow = 2
inst.append(b'data2')
self.assertTrue(inst.overflowed)
self.assertNotEqual(inst.buf, buf)
def test_read_strbuf(self):
inst = self._makeOne(10)
inst.strbuf = b'x'
inst.remaining = len(inst.strbuf)
result = inst.read()
self.assertEqual(result, b'x')
self.assertEqual(inst.remaining, 0)
def test_rollback_strbuf(self):
inst = self._makeOne(10)
inst.strbuf = b'x'
inst.remaining = len(inst.strbuf)
result = inst.read()
self.assertEqual(result, b'x')
self.assertEqual(inst.remaining, 0)
inst.rollback(1)
self.assertEqual(inst.remaining, 1)
result = inst.read()
self.assertEqual(result, b'x')
self.assertEqual(inst.remaining, 0)
def test_close_nobuf(self):
inst = self._makeOne()
inst.buf = None
self.assertEqual(inst.close(), None) # doesnt raise
def test_close_withbuf(self):
class Buffer(object):
def close(self):
self.closed = True
buf = Buffer()
inst = self._makeOne()
inst.buf = buf
inst.close()
self.assertTrue(buf.closed)
class KindaFilelike(object):
def __init__(self, bytes, close=None, tellresults=None):
self.bytes = bytes
self.tellresults = tellresults
if close is not None:
self.close = lambda: close
class Filelike(KindaFilelike):
def seek(self, v, whence=0):
self.seeked = v
def tell(self):
v = self.tellresults.pop(0)
return v
class DummyBuffer(object):
def __init__(self, length=0):
self.remaining = length
def append(self, s):
self.remaining = self.remaining + len(s)
def close(self):
self.closed = True
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