tree 621c6573edb1518d0b0a06248d4123a120ea8212
parent 1ff75bde48fe66d937b99b0655df941b94310fa1
author Christopher Wiley <wiley@google.com> 1463775790 -0700
committer Christopher Wiley <wiley@google.com> 1465316921 -0700

Expand test coverage of TetherInterfaceSM

( cherry-pick of 1b3830a2afab565a38572ac5c3238a171b2d56d4 )

Add tests for most normal case operations:
  - State machine startup.
  - Entering a tethered state (as USB interface and not)
  - Handling the first notification of an upstream interface
  - Handle changes in upstream interface
  - Handle unrequested teardown correctly

Bug: 28833951
Test: These tests pass

Change-Id: I2c0c9141bab9eaa92faec8de10fa653fb6236a74