Implementation of unit test for function customerChoiceForMenuItem().

test/test_CustomerMenu.c

@@ -0,0 +1,24 @@
+#include <unity.h>
+#include "../src/customerMenu.c"
+
+void test_customerChoiceForMenuEntry()
+{
+	int decision = 1;
+	/*customer choses to send money, return 1*/
+	TEST_ASSERT_EQUAL_INT(1, customerChoiceForMenuItem(decision));
+	/*customer choses to withdraw money, return 2*/
+	decision = 2;
+	TEST_ASSERT_EQUAL_INT(2, customerChoiceForMenuItem(decision));
+	/*customer choses to deposit money, return 3*/
+	decision = 3;
+	TEST_ASSERT_EQUAL_INT(3, customerChoiceForMenuItem(decision));
+	/*customer choses to request a loan, return 4*/
+	decision = 4;
+	TEST_ASSERT_EQUAL_INT(4, customerChoiceForMenuItem(decision));
+	/*invalid input values, the return value should always be -1*/
+	int arrayOfInvalidValues[] = {-1,-2,-3,-4,-5,-6,-7,-8,-9,-10,-11,-12,-13,-14,-15,-16,-17,-18,-19,-20,0, 123,3247,6839,38593,3033,55055};
+	int length = sizeof(arrayOfInvalidValues)/sizeof(int);
+	for(int i=0;i<length;++i){
+			TEST_ASSERT_EQUAL_INT(-1, customerChoiceForMenuItem(arrayOfInvalidValues[i]));
+	}
+}