start/stop button improvements #6483

only: global bad, let's carefully reset

firmware/hw_layer/debounce.h

@@ -25,6 +25,11 @@ public:
     static void startConfigurationList();
     static void debug();
     bool getPhysicalState();
+#if EFI_UNIT_TEST
+    static void resetForUnitTests() {
+      s_firstDebounce = nullptr;
+    }
+#endif
 private:
     const char* const m_name;
     efidur_t m_threshold;

unit_tests/test-framework/engine_test_helper.cpp

@@ -34,6 +34,7 @@ EngineTestHelperBase::EngineTestHelperBase(Engine * eng, engine_configuration_s
 	// todo: make this not a global variable, we need currentTimeProvider interface on engine
 	setTimeNowUs(0);
 	minCrankingRpm = 0;
+	ButtonDebounce::resetForUnitTests();
 	unitTestBusyWaitHack = false;
 	EnableToothLogger();
 	if (engine || engineConfiguration || config) {