Tests for twisted.internet.default.
| Class | PollReactorTests | Tests for the cases of twisted.internet.default._getInstallFunctionin which it picks the poll(2) or epoll(7)-based reactors. | 
| Class | SelectReactorTests | Tests for the cases of twisted.internet.default._getInstallFunctionin which it picks the select(2)-based reactor. | 
| Class | InstallationTests | Tests for actual installation of the reactor. |