diff --git a/src/main/java/hs/fulda/de/ci/exam/project/Customer.java b/src/main/java/hs/fulda/de/ci/exam/project/Customer.java
new file mode 100644
index 0000000..a85e014
--- /dev/null
+++ b/src/main/java/hs/fulda/de/ci/exam/project/Customer.java
@@ -0,0 +1,19 @@
+package hs.fulda.de.ci.exam.project;
+
+
+public class Customer extends Person{
+
+    private String frequentFlyerNumber;
+
+    public Customer(String name, Address address, String email, String phone) {
+        super(name, address, email, phone);
+    }
+
+    public void setFrequentFlyerNumber(String frequentFlyerNumber) {
+        this.frequentFlyerNumber = frequentFlyerNumber;
+    }
+
+    public String getFrequentFlyerNumber() {
+        return frequentFlyerNumber;
+    }
+}
diff --git a/src/test/java/hs/fulda/de/ci/exam/project/CustomerTest.java b/src/test/java/hs/fulda/de/ci/exam/project/CustomerTest.java
new file mode 100644
index 0000000..6c53905
--- /dev/null
+++ b/src/test/java/hs/fulda/de/ci/exam/project/CustomerTest.java
@@ -0,0 +1,38 @@
+package hs.fulda.de.ci.exam.project;
+
+import org.junit.jupiter.api.Test;
+
+import java.lang.reflect.Field;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class CustomerTest {
+
+    final Address address1 = new Address("Fuldaer str", "Fulda", "Hessen", "36037", "Germany");
+    final Customer person1 = new Customer("Max Mustermann", address1, "max.mustermann@gmail.com", "015147890206");
+
+
+    @Test
+    public void test_setFlyingNumber() throws NoSuchFieldException, IllegalAccessException{
+
+        person1.setFrequentFlyerNumber("5");
+
+        final Field field = person1.getClass().getDeclaredField("frequentFlyerNumber");
+        field.setAccessible(true);
+        assertEquals(field.get(person1), "5","set frequent flying number of the customer");
+    }
+
+    @Test
+    public void test_getFlyingNumber()  throws NoSuchFieldException, IllegalAccessException {
+
+        final Field field = person1.getClass().getDeclaredField("frequentFlyerNumber");
+        field.setAccessible(true);
+        field.set(person1, "10");
+
+        final String result = person1.getFrequentFlyerNumber();
+
+        assertEquals(result, "10","get frequent flying number of the customer");
+    }
+
+}