python - setuptools 测试隐藏导入错误。如何获得更好的信息？

Question

在 python setuptools 中，python setup.py test 运行测试套件。但是，如果我的测试套件中出现导入错误，我获得的唯一错误消息是 AttributeError 提示我的测试类丢失。有没有办法获得更详细的错误消息，以便我可以修复测试套件？

我将通过以下示例更好地解释自己。假设我有一个名为 foo 的包，用 paster 重新创建。然后我添加测试

./foo
./foo/__init__.py
./foo/tests
./foo/tests/__init__.py
./foo/tests/mytest.py
./setup.cfg
./setup.py

现在，假设 mytest.py 包含以下代码

import unittest
class MyTestClass(unittest.TestCase):
    def testFoo(self):
        self.assertEqual(1,1)

这行得通。但是，如果我尝试导入一个不存在的模块

import unittest
import frombiz
class MyTestClass(unittest.TestCase):
    def testFoo(self):
        self.assertEqual(1,1)

这是我得到的错误

Traceback (most recent call last):
  File "setup.py", line 26, in <module>
    test_suite = "foo.tests"
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/distutils/core.py", line 152, in setup
    dist.run_commands()
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/distutils/dist.py", line 975, in run_commands
    self.run_command(cmd)
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/distutils/dist.py", line 995, in run_command
    cmd_obj.run()
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/setuptools/command/test.py", line 121, in run
    self.with_project_on_sys_path(self.run_tests)
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/setuptools/command/test.py", line 101, in with_project_on_sys_path
    func()
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/setuptools/command/test.py", line 130, in run_tests
    testLoader = loader_class()
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/unittest.py", line 816, in __init__
    self.parseArgs(argv)
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/unittest.py", line 843, in parseArgs
    self.createTests()
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/unittest.py", line 849, in createTests
    self.module)
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/unittest.py", line 613, in loadTestsFromNames
    suites = [self.loadTestsFromName(name, module) for name in names]
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/unittest.py", line 587, in loadTestsFromName
    return self.loadTestsFromModule(obj)
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/setuptools/command/test.py", line 34, in loadTestsFromModule
    tests.append(self.loadTestsFromName(submodule))
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/unittest.py", line 584, in loadTestsFromName
    parent, obj = obj, getattr(obj, part)
AttributeError: 'module' object has no attribute 'mytest'

换句话说，没有引用失败的导入。

Answer 1

使用nose .无需修改您的代码。只是做:

$ pip install nose
$ nosetests

如果有 ImportError，你会看到它:

ERROR: Failure: ImportError (cannot import name MyModel)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/garyvdm/bwreport/ve/lib/python3.2/site-packages/nose/failure.py", line 37, in runTest
    raise self.exc_class(self.exc_val).with_traceback(self.tb)
  File "/home/garyvdm/bwreport/ve/lib/python3.2/site-packages/nose/loader.py", line 390, in loadTestsFromName
    addr.filename, addr.module)
  File "/home/garyvdm/bwreport/ve/lib/python3.2/site-packages/nose/importer.py", line 39, in importFromPath
    return self.importFromDir(dir_path, fqname)
  File "/home/garyvdm/bwreport/ve/lib/python3.2/site-packages/nose/importer.py", line 86, in importFromDir
    mod = load_module(part_fqname, fh, filename, desc)
  File "/home/garyvdm/bwreport/bwreport/daemon/__init__.py", line 11, in <module>
    from bwreport.models import (
ImportError: cannot import name MyModel