tree b07bb185b87f398288b91ad819d22266e892b14f
parent efe2cd12857b42eab49893fb9b623d6c6745d90c
author Andres Oportus <andresoportus@google.com> 1558123440 +0000
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> 1558123440 +0000

[hid][buttons] Add unit tests

Also add DeviceGetMetadataSize to the fake_ddk and refactor/simplify.

ZX-3814 #done

Test: hid-buttons-test unit tests and trace buttons pressing on Astro
via the hid uapp as in:
$ hid read /dev/sys/platform/00:00:13/hid-buttons/hid-device-000 3
hid read /dev/sys/platform/00:00:13/hid-buttons/hid-device-000 3
hid: input thread started for
/dev/sys/platform/00:00:13/hid-buttons/hid-device-000
hid: /dev/sys/platform/00:00:13/hid-buttons/hid-device-000 proto=0
hid: /dev/sys/platform/00:00:13/hid-buttons/hid-device-000 num reports:
1
hid: /dev/sys/platform/00:00:13/hid-buttons/hid-device-000 report ids...
ID 0x01 : TYPE   Input : SIZE 3 bytes
hid: /dev/sys/platform/00:00:13/hid-buttons/hid-device-000 maxreport=3
read returned 3
hid: input from /dev/sys/platform/00:00:13/hid-buttons/hid-device-000
01 00 00
read returned 3
hid: input from /dev/sys/platform/00:00:13/hid-buttons/hid-device-000
01 00 01
read returned 3
hid: input from /dev/sys/platform/00:00:13/hid-buttons/hid-device-000
01 01 01
hid: closing /dev/sys/platform/00:00:13/hid-buttons/hid-device-000
$

Change-Id: I5ca9cc8decd222f2fe872ce291bc6b8e7ba0833e