如果测试失败,我想在py.test拆解中打印子进程输出 - 或者将其发送到任何其他人类可读输出。是否有可能检查测试是否在拆卸时失败了?是否只有在测试失败期间才能获得子进程命令的输出?
我的代码:
"""Test different scaffold operations."""
import subprocess
import pytest
from tempfile import mkdtemp
@pytest.fixture(scope='module')
def app_scaffold(request) -> str:
"""py.test fixture to create app scaffold."""
folder = mkdtemp(prefix="websauna_test_")
cmdline = ["..."]
worker = subprocess.Popen(cmdline, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
worker.wait(timeout=5.0)
if worker.returncode is not None:
raise AssertionError("scaffold command did not properly exit: {}".format(" ".join(cmdline)))
def teardown():
worker.terminate()
# XXX: Hard to capture this only on failure for now
print(worker.stdout.read().decode("utf-8"))
print(worker.stderr.read().decode("utf-8"))
request.addfinalizer(teardown)
答案 0 :(得分:3)
您可以使用捕获测试中的异常的函数来装饰测试。如果有异常,请记录进程输出:
import functools
import subprocess
import pytest
def catch_exception(func):
@functools.wraps(func)
def wrapper(*args, **kwargs):
worker = kwargs['app_scaffold']
try:
return func(*args, **kwargs)
except Exception as e:
print('stdout:', worker.stdout.read().decode("utf-8"))
print('stderr:', worker.stderr.read().decode("utf-8"))
raise
return wrapper
@pytest.fixture(scope='module')
def app_scaffold(request) -> subprocess.Popen:
"""py.test fixture to create app scaffold."""
cmdline = ["echo", "something"]
worker = subprocess.Popen(cmdline, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
worker.wait(timeout=5.0)
return worker
@catch_exception
def test_foo(app_scaffold):
assert False
此代码会从您的示例中省略一些细节,但我认为它应该包含您处理案例所需的全部内容。
答案 1 :(得分:1)
您可以使用capsys
和capfd
灯具实际捕获在执行期间创建的stdout / stderr :( https://pytest.org/latest/capture.html)
答案 2 :(得分:1)
pytest-instafail 插件可能很有用
运行测试时,您可以使用 - instafail 选项。在执行其他测试时继续显示失败测试的失败