Tests for twisted.internet.base.
| Class | FakeReactor | A fake reactor implementation which just supports enough reactor APIs 
for ThreadedResolver. | 
| Class | ThreadedResolverTests | Tests for ThreadedResolver. | 
| Function | nothing | Function used by DelayedCallTests.test_str. | 
| Class | DelayedCallMixin | DelayedCall | 
| Class | DelayedCallNoDebugTests | DelayedCall | 
| Class | DelayedCallDebugTests | DelayedCall | 
| Class | TestSpySignalCapturingReactor | Subclass of ReactorBase to capture signals delivered to the reactor for inspection. | 
| Class | ReactorBaseSignalTests | Tests to exercise ReactorBase's signal exit reporting path. |