Fix PMD violations in java-strings *ToStringTest

java-strings/src/test/java/com/baeldung/string/tostring/CustomerComplexObjectToStringUnitTest.java

@@ -0,0 +1,25 @@
+package com.baeldung.string.tostring;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+public class CustomerComplexObjectToStringUnitTest {
+    private static final String CUSTOMER_COMPLEX_TO_STRING 
+      = "Customer [order=Order [orderId=A1111, desc=Game, value=0], getFirstName()=Rajesh, getLastName()=Bhojwani]";
+	 
+    @Test
+    public void givenComplex_whenToString_thenCustomerDetails() {
+        CustomerComplexObjectToString customer = new CustomerComplexObjectToString();
+        customer.setFirstName("Rajesh");
+        customer.setLastName("Bhojwani");
+        Order order    =    new Order();
+        order.setOrderId("A1111");
+        order.setDesc("Game");
+        order.setStatus("In-Shiping");
+        customer.setOrder(order);
+             
+        assertEquals(CUSTOMER_COMPLEX_TO_STRING, customer.toString());
+    }
+
+}