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"""Tests for utils.io"""
# Copyright (c) Jupyter Development Team.
# Distributed under the terms of the Modified BSD License.
import io as stdlib_io
import sys
from io import StringIO
from nbconvert.utils.io import unicode_std_stream
def test_UnicodeStdStream():
# Test wrapping a bytes-level stdout
stdoutb = stdlib_io.BytesIO()
stdout = stdlib_io.TextIOWrapper(stdoutb, encoding="ascii")
orig_stdout = sys.stdout
sys.stdout = stdout
try:
sample = "@łe¶ŧ←"
stream = unicode_std_stream()
stream.write(sample)
output = stdoutb.getvalue().decode("utf-8")
assert output == sample
assert not stdout.closed
finally:
sys.stdout = orig_stdout
def test_UnicodeStdStream_nowrap():
# If we replace stdout with a StringIO, it shouldn't get wrapped.
orig_stdout = sys.stdout
sys.stdout = StringIO()
try:
assert unicode_std_stream() is sys.stdout
assert not sys.stdout.closed
finally:
sys.stdout = orig_stdout
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