How to simulate a buffered file handle for unit testing

Vote count:

0

I want this to work correctly without buffering:

$ tail -f logfile | python parser.py

Previously I used:

for line in sys.stdin:
    parse(line)

But now I have implemented http://ift.tt/1E3Gx7D :

while True:
    line = sys.stdin.readline()
    if not line: break # EOF
    parse(line)

Question: I cannot think of a way to unit test my change without sleep(). How do I simulate a buffered filehandle?

edited 2 mins ago

Bhargav Rao

8,497

asked 3 mins ago

Willem

450

How to simulate a buffered file handle for unit testing