def test_append_sz_gt_overflow(self):
from waitress.buffers import BytesIOBasedBuffer
f = io.BytesIO(b'data')
inst = self._makeOne(f)
buf = BytesIOBasedBuffer()
inst.buf = buf
inst.overflow = 2
inst.append(b'data2')
self.assertEqual(f.getvalue(), b'data')
self.assertTrue(inst.overflowed)
self.assertNotEqual(inst.buf, buf)
def _makeOne(self, from_buffer=None):
from waitress.buffers import BytesIOBasedBuffer
return BytesIOBasedBuffer(from_buffer=from_buffer)