Unit tests for circuit.av.
| Class | TestValueBasis | Undocumented |
| Class | TestAV | Undocumented |
| Class | TestAV_Mods | Undocumented |
| Class | TestAV_Maker | Undocumented |
| Class | TestAV_Manager | Undocumented |
| Class | Test_params | This testing is important not so much because of the importance of a silly little property method, but to confirm which AV objects appear as parameters for different ways of setting them up. |
| Class | TestAV_ListHolder | Undocumented |