WIP: adding test with pytest-embedded

[igrr]

[igrr]

To test:

• with pytest:

  • echo CONFIG_EXAMPLE_UART_NUM=0 > sdkconfig
  • idf.py build
  • pytest Result is that the message sent via dut.write gets logged on console, but the app doesn't receive it:

    2022-01-07 11:56:16 INFO Example ready, receiving on UART0, GPIO21 at 9600 baud
    2022-01-07 11:56:16 INFO $GPRMC,170058.89,V,3554.928,N,08002.496,W,9.4,1.57,050521,,E*41
    

• launch qemu manually:

  • echo CONFIG_EXAMPLE_UART_NUM=0 > sdkconfig
  • idf.py build
  • generate build/flash_image.bin
  • qemu-system-xtensa -nographic -machine esp32 -drive file=build/flash_image.bin,if=mtd,format=raw When the program starts up, type something on the console and press enter:

    Example ready, receiving on UART0, GPIO21 at 9600 baud
    Read 15 bytes (15 total)
    $ not found yet
    Read 1 bytes (1 total)
    $ not found yet
    

[hfudev]

ah, I forgot to add the dut.write function... fixed here: https://github.com/espressif/pytest-embedded/pull/41

also need to modify the test script a bit. the dut.expect would turn the string into a regex. so if you want to compare string directly, should use expect_exact instead.

    dut.expect_exact("""
GPRMC sentence
Longitude:
  Degrees: 80
  Minutes: 2.496000
  Cardinal: W
Latitude:
  Degrees: 35
  Minutes: 54.928000
  Cardinal: N
Date & Time: 05 May 17:00:58 2021
Speed, in Knots: 9.400000
Track, in degrees: 1.570000
Magnetic Variation:
  Degrees: 0.000000
  Cardinal: E
Adjusted Track (heading): 1.570000
""".strip())

Now this should work, tested locally.