NOTE: CTS has two meanings here. HDMI defines a set of tests in Compliance Test Specification in HDMI 1.4b *HDMI Compliance Test Specification 1.4b and Android Compatibility Test Suite.

Android Compatibility Test Suite include specific tests from HDMI Compliance Test Specification and other Android specific tests.

Setup

Playback devices (aka Set Top Boxes)

Running these CTS tests requires a specific HDMI layout with a CEC adapter.

Android TV playback device
CEC adapter see External CEC Adapter instructions
HDMI Display (aka a TV)

Automation

Given the setup described above you can run all of these tests with the command

atest CtsHdmiCecHostTestCases