darwin: add testing for IOKit version fallbacks
This commit adds a new unit test that verifies that the interface
interface and device interface versions are as expected. The unit test
relies on new testonly symbols to get details about the implementation.
The commit also adds a sanity check on the versions to ensure that
libusb_init fails if a supported version can not be found.
In addition to the new tests this commit also updates the tests to
use the static version of libusb. This provides them access to any
hidden symbol including testonly symbols (which should never be
exported in the shared library).
Signed-off-by: Nathan Hjelm <hjelmn@google.com>
5 files changed
