[BAEL-12114] - Upgraded MapStruct article

mapstruct/src/test/java/com/baeldung/mapper/CarMapperUnitTest.java

@@ -0,0 +1,24 @@
+package com.baeldung.mapper;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+import com.baeldung.dto.CarDTO;
+import com.baeldung.entity.Car;
+
+public class CarMapperUnitTest {
+
+    @Test
+    public void givenCarEntitytoCar_whenMaps_thenCorrect() {
+        
+        Car entity  = new Car();
+        entity.setId(1);
+        entity.setName("Toyota");
+        
+        CarDTO carDto = CarMapper.INSTANCE.carToCarDTO(entity);
+
+        assertEquals(carDto.getId(), entity.getId());
+        assertEquals(carDto.getName(), entity.getName());
+    }
+}