From the Android root folder, after choosing the lunch combo, use make vts
to build VTS.
On the host machine, ensure that the software requirements for python SDK are met.
Given the setup described above you can run tests with any of the following commands:
cd $ANDROID_BUILD_TOP/out/host/linux-x86/vts/android-vts/tools ./vts-tradefed run commandAndExit vts -m VtsHalTvCecV1_0TargetTest
atest VtsHalTvCecV1_0TargetTest
Note : atest internally handles building as well. To update the test use '-c' (clear cache) option