Adds Shadow Write Test Method

Commit adds the test method for the shadow write. It ensures that any inconsistencies are properly handled and that changes to the old database are properly mirrored in the new database.

src/test/java/org/springframework/samples/petclinic/newDataStore/NewOwnerStoreTest.java

@@ -8,12 +8,16 @@ import java.util.Map;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.mockito.Mock;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
+import org.springframework.samples.petclinic.owner.Owner;
 import org.springframework.samples.petclinic.owner.OwnerRepository;
 import org.springframework.samples.petclinic.owner.StaticOwner;
 import org.springframework.test.context.junit4.SpringRunner;
 
+import static org.junit.Assert.assertEquals;
+
 /**
  * @author Gibran
  */
@@ -28,6 +32,9 @@ public class NewOwnerStoreTest {
 
     Map<Integer, StaticOwner> ownerStore;
 
+    @Mock
+    Owner mockOwner;
+
     @Before
     public void setup() {
         testOwnerStore = new NewOwnerStore(owner);
@@ -50,4 +57,20 @@ public class NewOwnerStoreTest {
     public void consistencyCheck () {
         System.out.println(testOwnerStore.checkConsistency());
     }
+
+    @Test
+    public void checkShadowWrite() {
+        testOwnerStore = new NewOwnerStore(owner);
+
+       //make sure that inconsisties are recorded and fixed
+       testOwnerStore.testPutInOldDatastoreOnly(mockOwner);
+       assertEquals(1, testOwnerStore.checkConsistency());
+       assertEquals(0, testOwnerStore.checkConsistency());
+
+       //make sure that any changes written to old database are also written to new database
+       testOwnerStore.save(mockOwner);
+       assertEquals(0, testOwnerStore.checkConsistency());
+    }
+
+
 }