在python-mock中，调用的是原始函数，而不是模拟。

Question

考虑到以下代码试图将shell_with_tag()配置为由`mock_shell_with_tag()模拟的代码：

#!/usr/bin/env python3

import pytest

def shell(cmdline, debug=True):
    return f"Original Shell command for {cmdline}.", None

def shell_with_tag(cmdline, debug=True, test_tag=None):
    return shell(cmdline, debug)

def mock_shell_with_tag(cmd, test_tag=None):
    if 'udf delete' in cmd:
        return ['MOCK Record deleted' if test_tag == 'success' else 'Not Found. ', None]
    elif 'udf show' in cmd:
        return ['MOCK Record shown' if test_tag == 'success' else 'Not Found. ', None]
    else:
        raise Exception(f"mock_shell: what function is this {cmd}")

def testUdfs(mocker):
    mocker.patch('tests.mocked.test_mock.shell_with_tag', mock_shell_with_tag)

    def testDelete(name, expected_delete='true'):
        out,err=shell_with_tag(f"udf delete --name {name}", test_tag ='success' if expected_delete else 'failure')
        print(f"Results from UDF delete: {out} err: {err}")
        assert 'MOCK Record' in out, "We went to the real one not the mock"

    testDelete('abc')

请注意，找到了模拟的函数tests.mocked.test_udfs.shell_with_tag()：如果不是，则生成一条错误消息:在正确获得此消息之前，需要付出一定的努力。

但是，在运行testDelete时，我们将调用原始函数而不是模拟函数。缺少什么来激活模拟函数？

Answer 1

@KlausD专注于进口，走上了正确的轨道。要使它发挥作用，关键的改变是：

    from tests.mocked import test_mock 
    mocker.patch('tests.mocked.test_mock.shell_with_tag', mock_shell_with_tag)

以下是更新的片段。

#!/usr/bin/env python3

import pytest

def shell(cmdline, debug=True):
    return f"Original Shell command for {cmdline}.", None

def shell_with_tag(cmdline, debug=True, test_tag=None):
    return shell(cmdline, debug)

def mock_shell_with_tag(cmd, test_tag=None):
    if 'udf delete' in cmd:
        return ['MOCK Record deleted' if test_tag == 'success' else 'Not Found. ', None]
    elif 'udf show' in cmd:
        return ['MOCK Record shown' if test_tag == 'success' else 'Not Found. ', None]
    else:
        raise(f"mock_shell: what function is this {cmd}")

def testUdfs(mocker):
    from tests.mocked import test_mock
    mocker.patch('tests.mocked.test_mock.shell_with_tag', mock_shell_with_tag)

    # def testDelete(name, expected_delete='true'):
    # out,err=shell_with_tag(f"udf delete --name {name}", test_tag ='success' if expected_delete else 'failure')
    out,err=test_mock.shell_with_tag(f"udf delete --name abc", test_tag ='success')
    print(f"Results from UDF delete: {out} err: {err}")
    assert 'MOCK Record' in out, "We went to the real one not the mock"

    # testDelete('abc')

print(__name__)

导入解析为其包含的文件