Progress towards a better application FSM, testing

firmware/main_mcu/test/test_local/DebounceFsmTest.cpp

@@ -0,0 +1,79 @@
+#include "DebounceFsm.h"
+#include "gtest/gtest.h"
+#include "gmock/gmock.h"
+
+using ::testing::Test;
+using ::testing::Return;
+
+class MockClock : public Clock {
+    public:
+        MOCK_METHOD(uint32_t, getMillis, ());
+};
+
+class MockGpioInput : public GpioInput {
+    public:
+        MOCK_METHOD(bool, read, ());
+};
+
+
+class DebounceFsmTest : public Test {
+    protected:
+
+        DebounceFsmTest() :
+            clock(),
+            gpioInput(),
+            activated(false),
+            deactivated(false)
+        {}
+        ~DebounceFsmTest() {}
+
+        static const unsigned int DEBOUNCE_MILLIS = 100;
+        static const bool ACTIVE_VALUE = true;
+        MockClock clock;
+        MockGpioInput gpioInput;
+
+        bool activated;
+        bool deactivated;
+
+        void SetUp() override {
+            fsm = new DebounceFsm(
+                clock,
+                gpioInput,
+                DEBOUNCE_MILLIS,
+                ACTIVE_VALUE,
+                [this](){activated = true;},
+                [this](){deactivated = true;});
+            ON_CALL(clock, getMillis()).WillByDefault(Return(0));
+            ON_CALL(gpioInput, read()).WillByDefault(Return(!ACTIVE_VALUE));
+            activated = false;
+            deactivated = false;
+        }
+
+        void TearDown() override {
+            fsm = nullptr;
+        }
+
+        DebounceFsm *fsm;
+};
+
+TEST_F(DebounceFsmTest, Noop) {
+
+    EXPECT_CALL(clock, getMillis()).WillOnce(Return(0));
+    EXPECT_CALL(gpioInput, read()).WillOnce(Return(ACTIVE_VALUE));
+    fsm->step();
+    EXPECT_EQ(false, activated);
+    EXPECT_EQ(false, deactivated);
+
+    EXPECT_CALL(clock, getMillis()).WillOnce(Return(DEBOUNCE_MILLIS));
+    EXPECT_CALL(gpioInput, read()).WillOnce(Return(ACTIVE_VALUE));
+    fsm->step();
+    EXPECT_EQ(true, activated);
+    EXPECT_EQ(false, deactivated);
+
+
+}
+
+int main(int argc, char** argv) {
+    ::testing::InitGoogleTest(&argc, argv);
+    return RUN_ALL_TESTS();
+}