diff options
Diffstat (limited to 'tests/test_cli.py')
-rw-r--r-- | tests/test_cli.py | 40 |
1 files changed, 18 insertions, 22 deletions
diff --git a/tests/test_cli.py b/tests/test_cli.py index 7cf7ed4..1cd92c2 100644 --- a/tests/test_cli.py +++ b/tests/test_cli.py @@ -4,41 +4,37 @@ Unit tests for CLI entry points. from __future__ import print_function -import unittest -import sys import functools -from contextlib import contextmanager - +import io import os -from io import StringIO, BytesIO +import sys +import typing +import unittest +from contextlib import contextmanager, redirect_stdout, redirect_stderr import rsa import rsa.cli import rsa.util -def make_buffer() -> StringIO: - buf = StringIO() - buf.buffer = BytesIO() - return buf +@contextmanager +def captured_output() -> typing.Generator: + """Captures output to stdout and stderr""" + # According to mypy, we're not supposed to change buf_out.buffer. + # However, this is just a test, and it works, hence the 'type: ignore'. + buf_out = io.StringIO() + buf_out.buffer = io.BytesIO() # type: ignore -def get_bytes_out(out: StringIO) -> bytes: - # Python 3.x writes 'bytes' to stdout.buffer - return out.buffer.getvalue() + buf_err = io.StringIO() + buf_err.buffer = io.BytesIO() # type: ignore + with redirect_stdout(buf_out), redirect_stderr(buf_err): + yield buf_out, buf_err -@contextmanager -def captured_output(): - """Captures output to stdout and stderr""" - new_out, new_err = make_buffer(), make_buffer() - old_out, old_err = sys.stdout, sys.stderr - try: - sys.stdout, sys.stderr = new_out, new_err - yield new_out, new_err - finally: - sys.stdout, sys.stderr = old_out, old_err +def get_bytes_out(buf) -> bytes: + return buf.buffer.getvalue() @contextmanager |