Implementation of unit tests for power() and add line to build-script in order to call ceedling from there.

build-script.sh

@@ -1,4 +1,5 @@
 clear
+ceedling test:all
 cd src/
 gcc stringManipulation.c loginCustomer.c createCustomer.c mainMenu.c program.c -lm -o program.out
 ./program.out

test/test_StringManipulation.c

@@ -1,8 +1,23 @@
+#include <stdlib.h>
 #include <time.h>
 #include <string.h>
 #include <unity.h>
 #include "../src/stringManipulation.c"
 
+
+void test_power()
+{
+	/*initializing test values*/
+	int testValues[] = {1,2,3,4,5,6,7,8,9};
+	int expectedValues[] = {1,4,9,16,25,36,49,64,81};
+	int length = sizeof(testValues)/sizeof(int);
+	/*assertions*/
+	const int exponent = 2;
+	for(int i=0;i<length;++i){
+		TEST_ASSERT_EQUAL_INT(expectedValues[i], power(testValues[i],exponent));	
+	}	
+}
+
 void test_to_string() 
 {
 	/*initializing test values*/
@@ -13,6 +28,7 @@ void test_to_string()
 	char *result_5[] = {"1000000","2000000","3000000","4000000","5000000","6000000","7000000",
 			    "8000000","9000000","10000000"};
 
+	/*assertions*/
 	for(int i=0;i<=10;++i){
 		TEST_ASSERT_EQUAL_STRING(result_1[i],to_string(i));
 	}