pybind11/tests/test_iostream.py
Ralf W. Grosse-Kunstleve 6493f496e3
Python 2 removal part 1: tests (C++ code is intentionally ~untouched) (#3688)
* `#error BYE_BYE_GOLDEN_SNAKE`

* Removing everything related to 2.7 from ci.yml

* Commenting-out Centos7

* Removing `PYTHON: 27` from .appveyor.yml

* "PY2" removal, mainly from tests. C++ code is not touched.

* Systematic removal of `u` prefix from `u"..."` and `u'...'` literals. Collateral cleanup of a couple minor other things.

* Cleaning up around case-insensitive hits for `[^a-z]py.*2` in tests/.

* Removing obsolete Python 2 mention in compiling.rst

* Proper `#error` for Python 2.

* Using PY_VERSION_HEX to guard `#error "PYTHON 2 IS NO LONGER SUPPORTED.`

* chore: bump pre-commit

* style: run pre-commit for pyupgrade 3+

* tests: use sys.version_info, not PY

* chore: more Python 2 removal

* Uncommenting Centos7 block (PR #3691 showed that it is working again).

* Update pre-commit hooks

* Fix pre-commit hook

* refactor: remove Python 2 from CMake

* refactor: remove Python 2 from setup code

* refactor: simplify, better static typing

* feat: fail with nice messages

* refactor: drop Python 2 C++ code

* docs: cleanup for Python 3

* revert: intree

revert: intree

* docs: minor touchup to py2 statement

Co-authored-by: Henry Schreiner <henryschreineriii@gmail.com>
Co-authored-by: Aaron Gokaslan <skylion.aaron@gmail.com>
2022-02-10 18:28:08 -08:00

296 lines
7.1 KiB
Python

from contextlib import redirect_stderr, redirect_stdout
from io import StringIO
from pybind11_tests import iostream as m
def test_captured(capsys):
msg = "I've been redirected to Python, I hope!"
m.captured_output(msg)
stdout, stderr = capsys.readouterr()
assert stdout == msg
assert stderr == ""
m.captured_output_default(msg)
stdout, stderr = capsys.readouterr()
assert stdout == msg
assert stderr == ""
m.captured_err(msg)
stdout, stderr = capsys.readouterr()
assert stdout == ""
assert stderr == msg
def test_captured_large_string(capsys):
# Make this bigger than the buffer used on the C++ side: 1024 chars
msg = "I've been redirected to Python, I hope!"
msg = msg * (1024 // len(msg) + 1)
m.captured_output_default(msg)
stdout, stderr = capsys.readouterr()
assert stdout == msg
assert stderr == ""
def test_captured_utf8_2byte_offset0(capsys):
msg = "\u07FF"
msg = "" + msg * (1024 // len(msg) + 1)
m.captured_output_default(msg)
stdout, stderr = capsys.readouterr()
assert stdout == msg
assert stderr == ""
def test_captured_utf8_2byte_offset1(capsys):
msg = "\u07FF"
msg = "1" + msg * (1024 // len(msg) + 1)
m.captured_output_default(msg)
stdout, stderr = capsys.readouterr()
assert stdout == msg
assert stderr == ""
def test_captured_utf8_3byte_offset0(capsys):
msg = "\uFFFF"
msg = "" + msg * (1024 // len(msg) + 1)
m.captured_output_default(msg)
stdout, stderr = capsys.readouterr()
assert stdout == msg
assert stderr == ""
def test_captured_utf8_3byte_offset1(capsys):
msg = "\uFFFF"
msg = "1" + msg * (1024 // len(msg) + 1)
m.captured_output_default(msg)
stdout, stderr = capsys.readouterr()
assert stdout == msg
assert stderr == ""
def test_captured_utf8_3byte_offset2(capsys):
msg = "\uFFFF"
msg = "12" + msg * (1024 // len(msg) + 1)
m.captured_output_default(msg)
stdout, stderr = capsys.readouterr()
assert stdout == msg
assert stderr == ""
def test_captured_utf8_4byte_offset0(capsys):
msg = "\U0010FFFF"
msg = "" + msg * (1024 // len(msg) + 1)
m.captured_output_default(msg)
stdout, stderr = capsys.readouterr()
assert stdout == msg
assert stderr == ""
def test_captured_utf8_4byte_offset1(capsys):
msg = "\U0010FFFF"
msg = "1" + msg * (1024 // len(msg) + 1)
m.captured_output_default(msg)
stdout, stderr = capsys.readouterr()
assert stdout == msg
assert stderr == ""
def test_captured_utf8_4byte_offset2(capsys):
msg = "\U0010FFFF"
msg = "12" + msg * (1024 // len(msg) + 1)
m.captured_output_default(msg)
stdout, stderr = capsys.readouterr()
assert stdout == msg
assert stderr == ""
def test_captured_utf8_4byte_offset3(capsys):
msg = "\U0010FFFF"
msg = "123" + msg * (1024 // len(msg) + 1)
m.captured_output_default(msg)
stdout, stderr = capsys.readouterr()
assert stdout == msg
assert stderr == ""
def test_guard_capture(capsys):
msg = "I've been redirected to Python, I hope!"
m.guard_output(msg)
stdout, stderr = capsys.readouterr()
assert stdout == msg
assert stderr == ""
def test_series_captured(capture):
with capture:
m.captured_output("a")
m.captured_output("b")
assert capture == "ab"
def test_flush(capfd):
msg = "(not flushed)"
msg2 = "(flushed)"
with m.ostream_redirect():
m.noisy_function(msg, flush=False)
stdout, stderr = capfd.readouterr()
assert stdout == ""
m.noisy_function(msg2, flush=True)
stdout, stderr = capfd.readouterr()
assert stdout == msg + msg2
m.noisy_function(msg, flush=False)
stdout, stderr = capfd.readouterr()
assert stdout == msg
def test_not_captured(capfd):
msg = "Something that should not show up in log"
stream = StringIO()
with redirect_stdout(stream):
m.raw_output(msg)
stdout, stderr = capfd.readouterr()
assert stdout == msg
assert stderr == ""
assert stream.getvalue() == ""
stream = StringIO()
with redirect_stdout(stream):
m.captured_output(msg)
stdout, stderr = capfd.readouterr()
assert stdout == ""
assert stderr == ""
assert stream.getvalue() == msg
def test_err(capfd):
msg = "Something that should not show up in log"
stream = StringIO()
with redirect_stderr(stream):
m.raw_err(msg)
stdout, stderr = capfd.readouterr()
assert stdout == ""
assert stderr == msg
assert stream.getvalue() == ""
stream = StringIO()
with redirect_stderr(stream):
m.captured_err(msg)
stdout, stderr = capfd.readouterr()
assert stdout == ""
assert stderr == ""
assert stream.getvalue() == msg
def test_multi_captured(capfd):
stream = StringIO()
with redirect_stdout(stream):
m.captured_output("a")
m.raw_output("b")
m.captured_output("c")
m.raw_output("d")
stdout, stderr = capfd.readouterr()
assert stdout == "bd"
assert stream.getvalue() == "ac"
def test_dual(capsys):
m.captured_dual("a", "b")
stdout, stderr = capsys.readouterr()
assert stdout == "a"
assert stderr == "b"
def test_redirect(capfd):
msg = "Should not be in log!"
stream = StringIO()
with redirect_stdout(stream):
m.raw_output(msg)
stdout, stderr = capfd.readouterr()
assert stdout == msg
assert stream.getvalue() == ""
stream = StringIO()
with redirect_stdout(stream):
with m.ostream_redirect():
m.raw_output(msg)
stdout, stderr = capfd.readouterr()
assert stdout == ""
assert stream.getvalue() == msg
stream = StringIO()
with redirect_stdout(stream):
m.raw_output(msg)
stdout, stderr = capfd.readouterr()
assert stdout == msg
assert stream.getvalue() == ""
def test_redirect_err(capfd):
msg = "StdOut"
msg2 = "StdErr"
stream = StringIO()
with redirect_stderr(stream):
with m.ostream_redirect(stdout=False):
m.raw_output(msg)
m.raw_err(msg2)
stdout, stderr = capfd.readouterr()
assert stdout == msg
assert stderr == ""
assert stream.getvalue() == msg2
def test_redirect_both(capfd):
msg = "StdOut"
msg2 = "StdErr"
stream = StringIO()
stream2 = StringIO()
with redirect_stdout(stream):
with redirect_stderr(stream2):
with m.ostream_redirect():
m.raw_output(msg)
m.raw_err(msg2)
stdout, stderr = capfd.readouterr()
assert stdout == ""
assert stderr == ""
assert stream.getvalue() == msg
assert stream2.getvalue() == msg2
def test_threading():
with m.ostream_redirect(stdout=True, stderr=False):
# start some threads
threads = []
# start some threads
for _j in range(20):
threads.append(m.TestThread())
# give the threads some time to fail
threads[0].sleep()
# stop all the threads
for t in threads:
t.stop()
for t in threads:
t.join()
# if a thread segfaults, we don't get here
assert True