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qemu-arm/qemu-riscv: improve tinytest runner so it doesn't need to generate .exp files on disk #15609

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dpgeorge
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@dpgeorge dpgeorge commented Aug 7, 2024

Summary

The qemu-arm and qemu-riscv ports generate a whole lot of .exp files in the tests/ directory when you run the tests on these ports. This leaves the repo in an unclean state.

This PR improves this situation by:

  • generating the .exp files from within the tools/tinytest-codegen.py script by calling out to Python to run them and collecting the resulting stdout output
  • then putting the output into a big dictionary of results
  • then generating the resulting build/genhdr/tests.h file

This results in a clean repo after running the tests. It also means that run-tests.py no longer needs a special case to handle the allowed tests for qemu-arm/riscv targets.

A bonus of this approach is that it's not much extra work to enable running the tests on qemu-* port using the via .mpy and via native emitter test framework that already exists in run-tests.py.

Note: this PR builds on #15577.

TODO:

  • test zephyr changes

Testing

The qemu-arm tests pass like they did before, but no stray .exp files are generated.

Trade-offs and Alternatives

It's a little slower this way when generating the .exp files but not by much.

An alternative to this approach would be to make the qemu-* ports have a stdio to the outside world for the REPL, then treat the qemu process as a board with a serial port, and run the test suite as it would normally be run for an attached hardware board.

Signed-off-by: Damien George <damien@micropython.org>
Signed-off-by: Damien George <damien@micropython.org>
To be used only when `run-tests.py` is imported as a module by another
Python script.

Signed-off-by: Damien George <damien@micropython.org>
TODO:
- test zephyr changes

Signed-off-by: Damien George <damien@micropython.org>
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github-actions bot commented Aug 7, 2024

Code size report:

   bare-arm:    +0 +0.000% 
minimal x86:    +0 +0.000% 
   unix x64:    +0 +0.000% standard
      stm32:    +0 +0.000% PYBV10
     mimxrt:    +0 +0.000% TEENSY40
        rp2:    +0 +0.000% RPI_PICO_W
       samd:    +0 +0.000% ADAFRUIT_ITSYBITSY_M4_EXPRESS

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codecov bot commented Aug 7, 2024

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.43%. Comparing base (afba3e0) to head (e05a67b).
Report is 8 commits behind head on master.

Additional details and impacted files
@@           Coverage Diff           @@
##           master   #15609   +/-   ##
=======================================
  Coverage   98.43%   98.43%           
=======================================
  Files         161      161           
  Lines       21281    21281           
=======================================
  Hits        20948    20948           
  Misses        333      333           

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@dpgeorge
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Closing in favour of #15624.

@dpgeorge dpgeorge closed this Aug 12, 2024
@dpgeorge dpgeorge deleted the ports-qemu-simplify-tests-exp branch August 12, 2024 02:39
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