自定义测试命令的 Python setup.py 测试依赖项答案

【问题标题】：Python setup.py test dependencies for custom test command自定义测试命令的 Python setup.py 测试依赖项
【发布时间】：2016-03-02 12:45:55
【问题描述】：

为了制作python setup.py test linting、测试和覆盖命令，我创建了一个自定义命令。但是，它不再安装指定为 tests_require 的依赖项。如何让两者同时工作？

class TestCommand(setuptools.Command):

    description = 'run linters, tests and create a coverage report'
    user_options = []

    def initialize_options(self):
        pass

    def finalize_options(self):
        pass

    def run(self):
        self._run(['pep8', 'package', 'test', 'setup.py'])
        self._run(['py.test', '--cov=package', 'test'])

    def _run(self, command):
        try:
            subprocess.check_call(command)
        except subprocess.CalledProcessError as error:
            print('Command failed with exit code', error.returncode)
            sys.exit(error.returncode)


def parse_requirements(filename):
    with open(filename) as file_:
        lines = map(lambda x: x.strip('\n'), file_.readlines())
    lines = filter(lambda x: x and not x.startswith('#'), lines)
    return list(lines)


if __name__ == '__main__':
    setuptools.setup(
        # ...
        tests_require=parse_requirements('requirements-test.txt'),
        cmdclass={'test': TestCommand},
    )

【问题讨论】：

标签： python testing dependencies setuptools packaging

【解决方案1】：

您从错误的类继承。尝试从setuptools.command.test.test 继承，它本身是setuptools.Command 的子类，但有其他方法来处理依赖项的安装。然后，您需要覆盖 run_tests() 而不是 run()。

所以，大致如下：

from setuptools.command.test import test as TestCommand


class MyTestCommand(TestCommand):

    description = 'run linters, tests and create a coverage report'
    user_options = []

    def run_tests(self):
        self._run(['pep8', 'package', 'test', 'setup.py'])
        self._run(['py.test', '--cov=package', 'test'])

    def _run(self, command):
        try:
            subprocess.check_call(command)
        except subprocess.CalledProcessError as error:
            print('Command failed with exit code', error.returncode)
            sys.exit(error.returncode)


if __name__ == '__main__':
    setuptools.setup(
        # ...
        tests_require=parse_requirements('requirements-test.txt'),
        cmdclass={'test': MyTestCommand},
    )

【讨论】：