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from __future__ import unicode_literals
from fs import iotools
import io
import unittest
from os.path import dirname, join, abspath
try:
unicode
except NameError:
unicode = str
class OpenFilelike(object):
def __init__(self, make_f):
self.make_f = make_f
@iotools.filelike_to_stream
def open(self, path, mode='r', buffering=-1, encoding=None, errors=None, newline=None, line_buffering=False, **kwargs):
return self.make_f()
def __enter__(self):
return self
def __exit__(self, *args, **kwargs):
self.f.close()
class TestIOTools(unittest.TestCase):
def get_bin_file(self):
path = join(dirname(abspath(__file__)), 'data/UTF-8-demo.txt')
return io.open(path, 'rb')
def test_make_stream(self):
"""Test make_stream"""
with self.get_bin_file() as f:
text = f.read()
self.assert_(isinstance(text, bytes))
with self.get_bin_file() as f:
with iotools.make_stream("data/UTF-8-demo.txt", f, 'rt') as f2:
text = f2.read()
self.assert_(isinstance(text, unicode))
def test_decorator(self):
"""Test filelike_to_stream decorator"""
o = OpenFilelike(self.get_bin_file)
with o.open('file', 'rb') as f:
text = f.read()
self.assert_(isinstance(text, bytes))
with o.open('file', 'rt') as f:
text = f.read()
self.assert_(isinstance(text, unicode))
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