Multiple Unity test suites for PlatformIO

test_runner.cpp

// Place actual test suites outside of primary "test_[folder]" and include them
#include "../mysuite/testsuite_mysuite.cpp"
// #include ... more test suites


int run_testsuites(void) {
  testsuite_mysuite::run();
  // ... more test suites
  return 0;
}

void setUp(void) {}
void tearDown(void) {}


#ifdef ARDUINO

  #include <Arduino.h>

  void setup() {
    Serial.begin(115200);

    while (!Serial) {
      delay(100);
    }

    run_testsuites();
  }

  void loop() {}

#else

  int main(int argc, char **argv) {
      run_testsuites();
      return 0;
  }

#endif

testsuite_mysuite.cpp

#include <unity.h>
// #include testsuite dependancies

struct testsuite_mysuite {
  static bool testsuite_var;

  static void test_isEqual(void) {
    bool isTrue = true;
    TEST_ASSERT_EQUAL(true, isTrue);
  }
  
  static void test_isNotEqual(void) {
    bool isFalse = false;
    TEST_ASSERT_NOT_EQUAL(true, isFalse);
  }

  static void run(){
    // Setup tests here
    
    UNITY_BEGIN();
  
    RUN_TEST(test_isEqual);
    RUN_TEST(test_isNotEqual);
    // ... more tests

    UNITY_END();
    
    // Tear down tests here
  }
};