运行 py.test 在 Dockerfile 中

Question

我有这个 Dockerfile，其中包含一行 RUN py.test -vv。

FROM bitnami/python:3.6-prod
#MORE DIRECTIVES
RUN py.test -vv
COPY . /files
WORKDIR /files
EXPOSE 8080

当我运行 docker-compose build 时，出现此错误。

Step 16/21 : RUN py.test -vv
 ---> Running in 5b3f55f10025
============================= test session starts ==============================
platform linux -- Python 3.6.9, pytest-5.2.1, py-1.8.0, pluggy-0.13.0 -- /opt/bitnami/python/bin/python
cachedir: .pytest_cache
rootdir: /
plugins: ordering-0.6, cov-2.8.1, docker-compose-3.1.2, celery-4.3.0
collecting ... collected 0 items / 1 errors

==================================== ERRORS ====================================
________________________ ERROR collecting test session _________________________
opt/bitnami/python/lib/python3.6/site-packages/_pytest/config/__init__.py:456: in _importconftest
    return self._conftestpath2mod[key]
E   KeyError: PosixPath('/opt/bitnami/python/lib/python3.6/site-packages/matplotlib/tests/conftest.py')

During handling of the above exception, another exception occurred:
opt/bitnami/python/lib/python3.6/site-packages/_pytest/config/__init__.py:462: in _importconftest
    mod = conftestpath.pyimport()
opt/bitnami/python/lib/python3.6/site-packages/py/_path/local.py:701: in pyimport
    __import__(modname)
opt/bitnami/python/lib/python3.6/site-packages/matplotlib/tests/__init__.py:16: in <module>
    'The baseline image directory does not exist. '
E   OSError: The baseline image directory does not exist. This is most likely because the test data is not installed. You may need to install matplotlib from source to get the test data.

During handling of the above exception, another exception occurred:
opt/bitnami/python/lib/python3.6/site-packages/py/_path/common.py:377: in visit
    for x in Visitor(fil, rec, ignore, bf, sort).gen(self):
opt/bitnami/python/lib/python3.6/site-packages/py/_path/common.py:429: in gen
    for p in self.gen(subdir):
opt/bitnami/python/lib/python3.6/site-packages/py/_path/common.py:429: in gen
    for p in self.gen(subdir):
opt/bitnami/python/lib/python3.6/site-packages/py/_path/common.py:429: in gen
    for p in self.gen(subdir):
opt/bitnami/python/lib/python3.6/site-packages/py/_path/common.py:429: in gen
    for p in self.gen(subdir):
opt/bitnami/python/lib/python3.6/site-packages/py/_path/common.py:429: in gen
    for p in self.gen(subdir):
opt/bitnami/python/lib/python3.6/site-packages/py/_path/common.py:429: in gen
    for p in self.gen(subdir):
opt/bitnami/python/lib/python3.6/site-packages/py/_path/common.py:429: in gen
    for p in self.gen(subdir):
opt/bitnami/python/lib/python3.6/site-packages/py/_path/common.py:418: in gen
    dirs = self.optsort([p for p in entries
opt/bitnami/python/lib/python3.6/site-packages/py/_path/common.py:419: in <listcomp>
    if p.check(dir=1) and (rec is None or rec(p))])
opt/bitnami/python/lib/python3.6/site-packages/_pytest/main.py:606: in _recurse
    ihook = self.gethookproxy(dirpath)
opt/bitnami/python/lib/python3.6/site-packages/_pytest/main.py:424: in gethookproxy
    my_conftestmodules = pm._getconftestmodules(fspath)
opt/bitnami/python/lib/python3.6/site-packages/_pytest/config/__init__.py:434: in _getconftestmodules
    mod = self._importconftest(conftestpath)
opt/bitnami/python/lib/python3.6/site-packages/_pytest/config/__init__.py:470: in _importconftest
    raise ConftestImportFailure(conftestpath, sys.exc_info())
E   _pytest.config.ConftestImportFailure: (local('/opt/bitnami/python/lib/python3.6/site-packages/matplotlib/tests/conftest.py'), (<class 'OSError'>, OSError('The baseline image directory does not exist. This is most likely because the test data is not installed. You may need to install matplotlib from source to get the test data.',), <traceback object at 0x7f814caaef88>))
!!!!!!!!!!!!!!!!!!! Interrupted: 1 errors during collection !!!!!!!!!!!!!!!!!!!!
============================== 1 error in 11.83s ===============================
ERROR: Service 'testproject' failed to build: The command '/bin/sh -c py.test -vv' returned a non-zero code: 2

我已经尝试在 Dockerfile 中添加 pip install matplotlib，但我仍然遇到同样的错误。

我之前有一个 NodeJS 应用程序，它也是 Dockerized，使用 mocha 对其进行了一些测试，并将 RUN mocha 放入 Dockerfile 中工作正常。我不确定 Python.

中的问题是什么

Answer 1

我觉得这里的问题是因为 python 中没有预装 pytest。因此，您必须在 docker 容器中添加 pytest 安装步骤。就我个人而言，我一直运行通过为 pytest 使用单独的 docker 文件，该文件用于安装和设置 ENTRYPOINT 为 pytest。

我已附上 docker-compose.yaml、docker 文件和 pytest.dockerfile 供您参考。或者，您可以直接在 .yaml file/dockerfile 本身中提及 pytest 安装步骤，因为您没有要添加任何其他服务并避免额外的 docker 文件。对于使用 docker 容器的运行 Selenium-pytest 测试自动化，此设置对我来说运行完美。请试试这个，让我们知道反馈。

version: '3.7'
services:
  test:
    volumes:
      - .:/files 
    build: 
      context: .
      dockerfile: pytest.dockerfile

docker-compose.yaml

FROM python:3.7-alpine
MAINTAINER xyz

ADD . /files
WORKDIR /files

ENV PYTHONDONTWRITEBYTECODE=true
EXPOSE 4444

docker文件。此处公开端口的选项也是可选的。

FROM python:3.7-alpine
MAINTAINER xyz

RUN pip install pytest

ENTRYPOINT [ "pytest" ]

pytest.dockerfile

运行 py.test 在 Dockerfile 中

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