Added test case for update functionality

projects/P02-VehiclesAPI/vehicles-api/src/test/java/com/udacity/vehicles/api/CarControllerTest.java

@@ -110,6 +110,18 @@ public void findCar() throws Exception {
  * a vehicle by ID. This should utilize the car from `getCar()` below.
  */
  }
+
+ /**
+ * Tests the update operation of the car by.
+ * @throws Exception when car update fails in the system
+ */
+ @Test
+ public void updateCar() throws Exception {
+ /**
+ * TODO: Add a test to check whether a vehicle is appropriately update or not.
+ * This should utilize the car from `getCar()` below.
+ */
+ }
 
  /**
  * Tests the deletion of a single car by ID.
@@ -147,4 +159,4 @@ private Car getCar() {
  car.setCondition(Condition.USED);
  return car;
  }
-}
+}