diff --git a/src/_file_information.h b/src/_file_information.h
index 1cb5200..22c8af6 100644
--- a/src/_file_information.h
+++ b/src/_file_information.h
@@ -1,2 +1,2 @@
 #define MAX_LENGTH 100
-#define CUSTOMER_DATA_FILE "CustomerData.txt"
\ No newline at end of file
+#define CUSTOMER_DATA_FILE "src/CustomerData.txt"
\ No newline at end of file
diff --git a/src/currentCustomerAccountBalance.c b/src/currentCustomerAccountBalance.c
index a91e306..d306175 100644
--- a/src/currentCustomerAccountBalance.c
+++ b/src/currentCustomerAccountBalance.c
@@ -1,4 +1,5 @@
 #include "currentCustomerAccountBalance.h"
+#include "_file_information.h"
 
 float fetchBalanceFromBalanceString(char balance_String[MAX_LENGTH]) {
     float balance = 0;
diff --git a/tests/test_currentCustomerAccountBalance.c b/tests/test_currentCustomerAccountBalance.c
new file mode 100644
index 0000000..4855135
--- /dev/null
+++ b/tests/test_currentCustomerAccountBalance.c
@@ -0,0 +1,72 @@
+#ifdef TEST
+
+#include <float.h>
+#include "unity.h"
+#include "currentCustomerAccountBalance.h"
+
+void setUp(void)
+{
+}
+
+void tearDown(void)
+{
+}
+
+void test_fetchBalanceFromBalanceString(void) {
+    char  balanceString[5][100] = {
+        "balance=0",
+        "balance=100",
+        "balance=200",
+        "balance=300",
+        "balance=400"
+    };
+
+    float balance = 0;
+    float result[5];
+    float expected[5];
+
+    for (int i = 0; i < 5; i++) {
+        result[i] = fetchBalanceFromBalanceString(balanceString[i]);
+    }
+
+    for (int i = 0; i < 5; i++) {
+        expected[i] = balance;
+        balance += 100;
+    }
+
+    for (int i =0; i < 5; i++) {
+        TEST_ASSERT_EQUAL_FLOAT(expected[i],result[i]);
+    }
+
+    
+}
+
+
+void test_checkFileOpen(void) {
+
+    FILE *file = fopen(CUSTOMER_DATA_FILE, "r");
+
+    TEST_ASSERT_TRUE(file);
+
+    fclose(file);
+}
+
+void test_failOpenFile(void) {
+    FILE *file = fopen("false_file_name", "r");
+
+    TEST_ASSERT_FALSE(file);
+
+}
+
+void test_getAvailableAccountBalance(void) {
+    int user_id = 1234;
+    float max   = FLT_MAX;
+    int result  = getAvailableAccountBalance(user_id);
+    
+    TEST_ASSERT_TRUE(result < max);
+}
+
+
+
+
+#endif // TEST