Question

以下是测试用例代码：

def test_interactive_session_set_language(monkeypatch):
    """Test user possibility to select language."""

    events = [':ru-en', EOFError]

    mock_input = mock.Mock(side_effect=events)

    mock_set_language = mock.Mock()

    monkeypatch.setattr('builtins.input', mock_input)
    monkeypatch.setattr('pylingvo.interactive.pylingvo.client.set_language',
                        mock_set_language)

    with pytest.raises(SystemExit):

        pylingvo.interactive.start_session()

    assert mock_set_language.call_count == 1

这是一个模块代码：

import pylingvo.client
import sys
import re


def start_session():
    """Start interactive session."""

    while True:

        try:

            line = input('> ')

        except (EOFError, KeyboardInterrupt):

            sys.exit()

        else:

            command = dispatch(line)


COMMAND_MATCH_PATTERNS = [
    ('^:[a-z]{2}-[a-z]{2}$', pylingvo.client.set_language),
    ('^.*$', Exception),
]


COMMAND_MATCH_TABLE = [(re.compile(regex), command)
                       for regex, command in COMMAND_MATCH_PATTERNS]


def dispatch(command_name):
    """Convert interactive input to callable object."""

    for pattern, command in COMMAND_MATCH_TABLE:

        if pattern.match(command_name):

            return command

此测试用例因此消息失败：

E       assert 0 == 1
E        +  where 0 = <Mock id='139806765631632'>.call_count

我们可以看到模拟对象没有调用到期测试运行。所以我的问题是如何正确设置模拟属性然后这个测试用例可以通过？

Answer 1

看起来你正在修补错误的目标。试试这个：

monkeypatch.setattr('pylingvo.client.set_language', mock_set_language)

Pytest没有为mock对象设置属性

1 个答案: