Re-enable some of the examples, with testing
These examples were disabled because they were not up-to-date with the new VTK testing architecture.
Issues that still need to be resolved:
- Should the test simply use the example executable? For VTK 8 and earlier, a separate test executable was built. For VTK 9, there doesn't seem to be any advantage to this, so directly testing the example executable is best.
- Should test input data be always be downloaded for the example? I think it should, since the example should be as stand-alone as possible, even when built as part of the VTK build.
- Should Python examples be tested? Should input data and regression images be shared between Python examples and the equivalent Cxx example?
Edited by David Gobbi