The TrustedUIManager is an integral component on which Marketplace and Identity depend. We should have a marionette test suite that works for developers on desktop (for testing new features and guarding against regressions) as well as for QA on device. There are already some Identity-oriented tests exercising the Trusty UI in test_apps/uitest and gaia-ui-test, but a fuller suite is needed that is not tied to either Marketplace or Identity. Some tests we should have include: - crashing an app that's spawned a trusty ui - crashing the trusty ui - closing an intermediate layer in the trusty ui stack (see Bug 828182) - canceling the ui by user action (the x button) - canceling the ui by application (calling close()) - doing any or all of the above with more than one app spawning the ui Note that the TrustedUIManager can only be launched by chrome, so most of the code may need to reside in gaia-ui-tests, because marionette can execute JS in chrome context but gaia test_apps/uitest cannot

This doesn't belong in bugzilla. Issues like these are tracked in github, not bugzilla. Please file this in https://github.com/mozilla/gaia-ui-tests/issues?state=open.