我试着在pytest中使用TDD(测试驱动开发)。
当我使用print时，pytest将不会打印到控制台。
我使用pytest my_tests.py来运行它。
文档似乎说默认情况下它应该工作:http://pytest.org/latest/capture.html
But:
import myapplication as tum
class TestBlogger:
@classmethod
def setup_class(self):
self.user = "alice"
self.b = tum.Blogger(self.user)
print "This should be printed, but it won't be!"
def test_inherit(self):
assert issubclass(tum.Blogger, tum.Site)
links = self.b.get_links(posts)
print len(links) # This won't print either.
我的标准输出控制台没有输出任何内容(只有正常的进度以及通过/失败的测试数量)。
我正在测试的脚本包含打印:
class Blogger(Site):
get_links(self, posts):
print len(posts) # It won't get printed in the test.
在unittest模块中，默认情况下打印所有内容，这正是我所需要的。但是，出于其他原因，我希望使用pytest。
有人知道如何显示打印语句吗?
我最初来到这里是为了找到如何在VSCode的控制台中打印PyTest，同时从那里运行/调试单元测试。这可以通过下面的启动来完成。json配置。给定虚拟环境文件夹.venv。
"version": "0.2.0",
"configurations": [
{
"name": "PyTest",
"type": "python",
"request": "launch",
"stopOnEntry": false,
"pythonPath": "${config:python.pythonPath}",
"module": "pytest",
"args": [
"-sv"
],
"cwd": "${workspaceRoot}",
"env": {},
"envFile": "${workspaceRoot}/.venv",
"debugOptions": [
"WaitOnAbnormalExit",
"WaitOnNormalExit",
"RedirectOutput"
]
}
]
}
我需要打印关于跳过测试的重要警告，正好当PyTest静音字面上的一切。
我不想通过测试来传递一个信号，所以我做了如下修改:
def test_2_YellAboutBrokenAndMutedTests():
import atexit
def report():
print C_patch.tidy_text("""
In silent mode PyTest breaks low level stream structure I work with, so
I cannot test if my functionality work fine. I skipped corresponding tests.
Run `py.test -s` to make sure everything is tested.""")
if sys.stdout != sys.__stdout__:
atexit.register(report)
atexit模块允许我在PyTest释放输出流之后打印内容。输出如下所示:
============================= test session starts ==============================
platform linux2 -- Python 2.7.3, pytest-2.9.2, py-1.4.31, pluggy-0.3.1
rootdir: /media/Storage/henaro/smyth/Alchemist2-git/sources/C_patch, inifile:
collected 15 items
test_C_patch.py .....ssss....s.
===================== 10 passed, 5 skipped in 0.15 seconds =====================
In silent mode PyTest breaks low level stream structure I work with, so
I cannot test if my functionality work fine. I skipped corresponding tests.
Run `py.test -s` to make sure everything is tested.
~/.../sources/C_patch$
Message即使在PyTest处于静默模式时也会被打印，如果使用py运行东西则不会被打印。Test -s，所有东西都已经测试好了。
