Added zcd module's tests

tests/zero_cross_detection/CMakeLists.txt

@@ -0,0 +1,11 @@
+# TEST_RUNNER
+add_library(test_zero_cross_detection
+    test_zero_cross_detection.cpp    
+)
+
+target_link_libraries(test_zero_cross_detection
+    ${CPPUTEST_LIBRARIES}/libCppUTest.a
+    ${CPPUTEST_LIBRARIES}/libCppUTestExt.a
+    zero_cross_detection
+    MockADC
+)

tests/zero_cross_detection/test_zero_cross_detection.cpp

@@ -0,0 +1,111 @@
+/*
+ * Author: username
+ * Date: todays_date 
+ * filename: test_zero_cross_detection.c
+ * description: module_purpose
+ */
+
+#include "CppUTest/CommandLineTestRunner.h"
+#include "CppUTest/TestFailure.h"
+#include "CppUTest/TestPlugin.h"
+#include "CppUTest/UtestMacros.h"
+#include "CppUTestExt/MockSupport.h"
+#include <cstdint>
+
+extern "C" 
+{
+#include "MockADC.h"
+#include "zero_cross_detection.h"
+}
+
+TEST_GROUP(test_zero_cross_detection)
+{
+
+    void setup()
+    {
+
+    }
+    void teardown()
+    {
+        mock().checkExpectations();
+        mock().clear();
+    }
+};
+
+
+static void ZCDSetupExpectations(void)
+{
+    mock().expectOneCall("ADC_Init")
+        .withUnsignedIntParameter("pin_num", 7);
+
+    mock().expectOneCall("ADC_Enable");
+}
+
+
+static void PollIterationExpectations(void)
+{
+    ZCDSetupExpectations();
+
+    mock().expectOneCall("ADC_ReadValue_Impl")
+        .withUnsignedIntParameter("pin_num", 7)
+        .ignoreOtherParameters();
+
+    mock().expectOneCall("ADC_Disable");
+
+    ZCDSetupExpectations();
+
+    mock().expectOneCall("ADC_ReadValue_Impl")
+        .withUnsignedIntParameter("pin_num", 7)
+        .ignoreOtherParameters();
+
+    mock().expectOneCall("ADC_Disable");
+}
+
+
+TEST(test_zero_cross_detection, ZCD_SetupCallsCorrectFuncs)
+{
+    ZCDSetupExpectations();
+
+    ZCD_Setup();
+}
+
+
+TEST(test_zero_cross_detection, ZCD_IsTriggeredCallsCorrectFunctions)
+{
+    MockADC_ZeroIndex();
+    
+    PollIterationExpectations();
+
+    CHECK_FALSE(ZCD_IsTriggered());
+}
+
+
+TEST(test_zero_cross_detection, ZCD_IsTriggerdTrueWhenRising)
+{
+    MockADC_ZeroIndex();
+
+    MockADC_PushValue(512);
+    MockADC_PushValue(450);
+
+    PollIterationExpectations();
+
+    CHECK_TRUE(ZCD_IsTriggered()); 
+}
+
+
+TEST(test_zero_cross_detection, ZCD_PollWorksAfterCalls)
+{
+    MockADC_ZeroIndex();
+
+    MockADC_PushValue(512);
+    MockADC_PushValue(450);
+    MockADC_PushValue(50);
+    MockADC_PushValue(50);
+
+    PollIterationExpectations();
+    PollIterationExpectations();
+
+    ZCD_Poll();
+}
+
+