test_plugin.py 文件源码

def _testDetectNewFiles(self):
        writeFileName = sibpath(plugins.__file__, 'pluginextra.py')
        try:
            wf = file(writeFileName, 'w')
        except IOError, ioe:
            if ioe.errno == errno.EACCES:
                raise unittest.SkipTest(
                    "No permission to add things to twisted.plugins")
            else:
                raise
        else:
            try:
                wf.write(begintest)
                wf.flush()

                self.failIfIn('twisted.plugins.pluginextra', sys.modules)
                self.failIf(hasattr(sys.modules['twisted.plugins'], 'pluginextra'),
                            "plugins package still has pluginextra module")

                plgs = list(plugin.getPlugins(plugin.ITestPlugin))

                self.assertEquals(
                    len(plgs), 2,
                    "Unexpected plugins found: %r" % (
                        [p.__name__ for p in plgs]))

                names = ['TestPlugin', 'FourthTestPlugin']
                for p in plgs:
                    names.remove(p.__name__)
                    p.test1()
            finally:
                wf.close()
                self._unimportPythonModule(
                    sys.modules['twisted.plugins.pluginextra'],
                    True)