Print the command when a greentea test is being run. Also fix mbedhtrun not being on PATH causing all tests to pass!

[multiplemonomials]

Summary of changes

• Print the command when a host test is being run. This makes it easier to understand what the test runner is doing behind the scenes. It looks like:

Executing: mbedhtrun --skip-flashing -f testshield-spi.bin -p COM3 -m NUCLEO_L452RE_P --baud-rate=115200

• While developing this, I noticed that one could get a free pass on all tests if mbedhtrun was not in your PATH. Apparently failing to find an executable does not count as a "command error" in CMake?? I changed how it invokes mbedhtrun to fix this.

Impact of changes

Migration actions required

Documentation

Working on testing documentation rn

---

Pull request type

[X] Patch update (Bug fix / Target update / Docs update / Test update / Refactor)
[] Feature update (New feature / Functionality change / New API)
[] Major update (Breaking change E.g. Return code change / API behaviour change)

---

Test results

[] No Tests required for this change (E.g docs only update)
[X] Covered by existing mbed-os tests (Greentea or Unittest)
[] Tests / results supplied as part of this PR

---

Reviewers

@JohnK1987
@jay-sridharan

---

[JohnK1987]

It seems be ok.

I tried it and expected command was printed in console output.

2: Executing: mbedhtrun --skip-flashing -p COM3 -e C:/Users/User/MbedCE_GreenTea/mbed-os/hal/tests/TESTS/mbed_hal/common_tickers/../../host_tests -m NUCLEO_F767ZI --baud-rate=9600

BR, Jan

[multiplemonomials]

Sweet! Can you leave an approving review so I can merge? You have to go to the files changed tab, click Review changes, and submit an approval.