test_plugin.py 文件源码

def _testDetectFilesChanged(self):
        writeFileName = sibpath(plugins.__file__, 'pluginextra.py')
        try:
            writeFile = file(writeFileName, 'w')
        except IOError, ioe:
            if ioe.errno == errno.EACCES:
                raise unittest.SkipTest(
                    "No permission to add things to twisted.plugins")
            else:
                raise
        try:
            writeFile.write(begintest)
            writeFile.flush()
            plgs = list(plugin.getPlugins(plugin.ITestPlugin))
            # Sanity check
            self.assertEquals(
                len(plgs), 2,
                "Unexpected plugins found: %r" % (
                    [p.__name__ for p in plgs]))

            writeFile.write(extratest)
            writeFile.flush()

            # Fake out Python.
            self._unimportPythonModule(sys.modules['twisted.plugins.pluginextra'])

            # Make sure additions are noticed
            plgs = list(plugin.getPlugins(plugin.ITestPlugin))

            self.assertEquals(len(plgs), 3, "Unexpected plugins found: %r" % (
                    [p.__name__ for p in plgs]))

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