def test_write(self):
import sys
base = TReaderWriter()
filter = streamio.BufferingInputStream(
streamio.BufferingOutputStream(base, 4), 4)
def f():
filter.write("123456789")
for chunk in base.chunks:
assert len(chunk[1]) >= 4
s = filter.read(sys.maxint)
assert base.buf == "123456789"
base.chunks = []
filter.write("abc")
assert not base.chunks
s = filter.read(sys.maxint)
assert base.buf == "123456789abc"
base.chunks = []
filter.write("012")
assert not base.chunks
filter.seek(4, 0)
assert base.buf == "123456789abc012"
assert filter.read(3) == "567"
filter.write('x')
filter.flush()
assert base.buf == "1234567x9abc012"
self.interpret(f, [])
def f():
base = TWriter()
filter = streamio.BufferingOutputStream(base, 4)
filter.seek(3, 0)
filter.write("y" * 2)
filter.close()
assert base.buf == "\0" * 3 + "y" * 2
def f():
base = TWriter()
filter = streamio.BufferingOutputStream(base, 4)
filter.write('12345678')
filter.truncate(4)
filter.write('y')
filter.close()
assert base.buf == '1234' + '\0' * 4 + 'y'
def test_write_seek(self):
base = TWriter()
filter = streamio.BufferingOutputStream(base, 4)
def f():
filter.write("x"*6)
filter.seek(3, 0)
filter.write("y"*2)
filter.close()
assert base.buf == "x"*3 + "y"*2 + "x"*1
self.interpret(f, [])
def test_write_seek_beyond_end(self):
"Linux behaviour. May be different on other platforms."
base = TReaderWriter()
filter = streamio.BufferingInputStream(
streamio.BufferingOutputStream(base, 4), 4)
def f():
filter.seek(3, 0)
filter.write("y"*2)
filter.close()
assert base.buf == "\0"*3 + "y"*2
self.interpret(f, [])
def f():
base = TWriter()
filter = streamio.BufferingOutputStream(base, 4)
filter.write("123")
assert not base.chunks
assert filter.tell() == 3
filter.write("456")
filter.write("789ABCDEF")
filter.write("0123")
assert filter.tell() == 19
filter.close()
assert base.buf == "123456789ABCDEF0123"
for chunk in base.chunks[:-1]:
assert len(chunk[1]) >= 4
