test_plugin.py 文件源码

def _testDetectFilesRemoved(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.close()

                # Generate a cache with pluginextra in it.
                list(plugin.getPlugins(plugin.ITestPlugin))

            finally:
                self._unimportPythonModule(
                    sys.modules['twisted.plugins.pluginextra'],
                    True)
            plgs = list(plugin.getPlugins(plugin.ITestPlugin))
            self.assertEquals(1, len(plgs))