|
|
# encoding: utf-8
|
|
|
"""Tests for io.py"""
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Copyright (C) 2008-2011 The IPython Development Team
|
|
|
#
|
|
|
# Distributed under the terms of the BSD License. The full license is in
|
|
|
# the file COPYING, distributed as part of this software.
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
from __future__ import print_function
|
|
|
|
|
|
import sys
|
|
|
|
|
|
from StringIO import StringIO
|
|
|
from subprocess import Popen, PIPE
|
|
|
|
|
|
import nose.tools as nt
|
|
|
|
|
|
from IPython.testing import decorators as dec
|
|
|
from IPython.utils.io import Tee, capture_output
|
|
|
from IPython.utils.py3compat import doctest_refactor_print
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Tests
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
|
|
|
def test_tee_simple():
|
|
|
"Very simple check with stdout only"
|
|
|
chan = StringIO()
|
|
|
text = 'Hello'
|
|
|
tee = Tee(chan, channel='stdout')
|
|
|
print(text, file=chan)
|
|
|
nt.assert_equal(chan.getvalue(), text+"\n")
|
|
|
|
|
|
|
|
|
class TeeTestCase(dec.ParametricTestCase):
|
|
|
|
|
|
def tchan(self, channel, check='close'):
|
|
|
trap = StringIO()
|
|
|
chan = StringIO()
|
|
|
text = 'Hello'
|
|
|
|
|
|
std_ori = getattr(sys, channel)
|
|
|
setattr(sys, channel, trap)
|
|
|
|
|
|
tee = Tee(chan, channel=channel)
|
|
|
print(text, end='', file=chan)
|
|
|
setattr(sys, channel, std_ori)
|
|
|
trap_val = trap.getvalue()
|
|
|
nt.assert_equal(chan.getvalue(), text)
|
|
|
if check=='close':
|
|
|
tee.close()
|
|
|
else:
|
|
|
del tee
|
|
|
|
|
|
def test(self):
|
|
|
for chan in ['stdout', 'stderr']:
|
|
|
for check in ['close', 'del']:
|
|
|
yield self.tchan(chan, check)
|
|
|
|
|
|
def test_io_init():
|
|
|
"""Test that io.stdin/out/err exist at startup"""
|
|
|
for name in ('stdin', 'stdout', 'stderr'):
|
|
|
cmd = doctest_refactor_print("from IPython.utils import io;print io.%s.__class__"%name)
|
|
|
p = Popen([sys.executable, '-c', cmd],
|
|
|
stdout=PIPE)
|
|
|
p.wait()
|
|
|
classname = p.stdout.read().strip().decode('ascii')
|
|
|
# __class__ is a reference to the class object in Python 3, so we can't
|
|
|
# just test for string equality.
|
|
|
assert 'IPython.utils.io.IOStream' in classname, classname
|
|
|
|
|
|
def test_capture_output():
|
|
|
"""capture_output() context works"""
|
|
|
|
|
|
with capture_output() as io:
|
|
|
print('hi, stdout')
|
|
|
print('hi, stderr', file=sys.stderr)
|
|
|
|
|
|
nt.assert_equal(io.stdout, 'hi, stdout\n')
|
|
|
nt.assert_equal(io.stderr, 'hi, stderr\n')
|
|
|
|
