Clean up unit tests.

- Rework unit tests to eliminate some null checks from production code.
- Fix some flakiness in the tests resulting from a coupling between
  DirectoryFragment.Model and the application View.

Change-Id: I6b23774a5b4897f33d8641e677bda9e66d86cb96
2 files changed
tree: ab1105fce9cd451669540a8c2b6de7b34a518160
  1. res/
  2. src/
  3. tests/
  4. Android.mk
  5. AndroidManifest.xml
  6. wrap_alpha.py