Additional tests covering parts of path interface

Change-Id: I28fa842a56c3ff6464b6f4175baee1e6f1d99994
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292970
Commit-Queue: Nathaniel Nifong <nifong@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
2 files changed