beremiz

Tests: Add time emulation feature for tests with BEREMIZ_TEST_CYCLES CFLAG.
wxPython4
2023-03-27, Edouard Tisserant
a811e1ff718a
Parents 1db10e9df882
Children fda6c1a37662
Tests: Add time emulation feature for tests with BEREMIZ_TEST_CYCLES CFLAG.

Adding BEREMIZ_TEST_CYCLES=1000 in a project's CFLAGS will:
- run 1000 cycles with no pause
- emulate time flowing normaly for PLC code
- exit PLC thread

This allows:
- testing standard library blocks that deal with time without having to wait
- unit testing and code coverage with POUs that uses time
1 files changed, 25 insertions(+), 1 deletions(-)
  • +25 -1
    targets/Linux/plc_Linux_main.c
    • --- a/targets/Linux/plc_Linux_main.c Sun Mar 12 00:55:19 2023 +0100
    +++ b/targets/Linux/plc_Linux_main.c Mon Mar 27 10:12:20 2023 +0200
    @@ -117,6 +117,11 @@
    struct timespec plc_start_time;
    #endif
    +// BEREMIZ_TEST_CYCLES is defined in tests that need to emulate time:
    +// - all BEREMIZ_TEST_CYCLES cycles are executed in a row with no pause
    +// - __CURRENT_TIME is incremented each cycle according to emulated cycle period
    +
    +#ifndef BEREMIZ_TEST_CYCLES
    // Sleep until next PLC run
    res = clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME, &next_cycle_time, NULL);
    if(res==EINTR){
    @@ -126,6 +131,7 @@
    _LogError("PLC thread timer returned error %d \n", res);
    return;
    }
    +#endif // BEREMIZ_TEST_CYCLES
    #ifdef REALTIME_LINUX
    // timer overrun detection
    @@ -137,12 +143,30 @@
    }
    #endif
    +#ifdef BEREMIZ_TEST_CYCLES
    +#define xstr(s) str(s)
    +#define str(arg) #arg
    + // fake current time
    + __CURRENT_TIME.tv_sec = next_cycle_time.tv_sec;
    + __CURRENT_TIME.tv_nsec = next_cycle_time.tv_nsec;
    + // exit loop when enough cycles
    + if(__tick >= BEREMIZ_TEST_CYCLES) {
    + _LogWarning("TEST PLC thread ended after "xstr(BEREMIZ_TEST_CYCLES)" cycles.\n");
    + // After pre-defined test cycles count, PLC thread exits.
    + // Remaining PLC runtime is expected to be cleaned-up/killed by test script
    + return;
    + }
    +#else
    PLC_GetTime(&__CURRENT_TIME);
    +#endif
    __run();
    +#ifndef BEREMIZ_TEST_CYCLES
    // ensure next PLC cycle occurence is in the future
    clock_gettime(CLOCK_MONOTONIC, &plc_end_time);
    - while(timespec_gt(plc_end_time, next_cycle_time)){
    + while(timespec_gt(plc_end_time, next_cycle_time))
    +#endif
    + {
    periods += 1;
    inc_timespec(&next_cycle_time, period_ns);
    }