Created a helper function for the ADC storage testing

tests/ADC/test_ADC.cpp

@@ -37,9 +37,20 @@ TEST(test_ADC, FirstTest)
    CHECK(true);
 }
 
+static void ADCStoresPortState(void){
+    mock().expectOneCall("RegEdit_ReadReg")
+        .withPointerParameter("reg", (void *) &PORTA.OUT)
+        .andReturnValue(0xFF);
+
+    mock().expectOneCall("RegEdit_ReadReg")
+        .withPointerParameter("reg", (void *) &PORTA.DIR)
+        .andReturnValue(0xFF);
+}
 
 TEST(test_ADC, ADC_InitPortAPin7UsesCorrectRegisters)
 {
+    ADCStoresPortState();
+
     //Check for setting the direction to input.
     mock().expectOneCall("RegEdit_SetBit")
         .withPointerParameter("reg", (void *) &PORTA.DIRCLR)