HONEYCOMB-431: add validation support to Writers

This patch introduces FlatWriterRegistry.validateModifications.
Implementation iterates over writersOrder following bulkUpdate logic
to properly support subtree writers case.

Writers are now cabable of validating modifications.
Commonly used implementations (GenericWriter and GenericListWriter)
delegate validation capbility to Validators.

Change-Id: If7a0bb0838c0b8f2c0393c989f3b03853a2ea679
Signed-off-by: Marek Gradzki <mgradzki@cisco.com>

1 files changed, 27 insertions, 2 deletions

diff --git a/infra/translate-impl/src/test/java/io/fd/honeycomb/translate/impl/write/GenericListWriterTest.java b/infra/translate-impl/src/test/java/io/fd/honeycomb/translate/impl/write/GenericListWriterTest.java
index 91785b25e..20cabc5b4 100644
--- a/infra/translate-impl/src/test/java/io/fd/honeycomb/translate/impl/write/GenericListWriterTest.java
+++ b/infra/translate-impl/src/test/java/io/fd/honeycomb/translate/impl/write/GenericListWriterTest.java
@@ -22,6 +22,7 @@ import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
 import io.fd.honeycomb.translate.spi.write.ListWriterCustomizer;
+import io.fd.honeycomb.translate.write.Validator;
 import io.fd.honeycomb.translate.write.WriteContext;
 import io.fd.honeycomb.translate.write.WriteFailedException;
 import java.util.Collections;
@@ -42,7 +43,6 @@ public class GenericListWriterTest {
     private ListWriterCustomizer<IdentifiableDataObject, DataObjectIdentifier> customizer;
     @Mock
     private WriteContext ctx;
-    private GenericListWriter<IdentifiableDataObject, DataObjectIdentifier> writer;
     @Mock
     private IdentifiableDataObject before;
     @Mock
@@ -51,11 +51,15 @@ public class GenericListWriterTest {
     private IdentifiableDataObject after;
     @Mock
     private DataObjectIdentifier keyAfter;
+    @Mock
+    private Validator<IdentifiableDataObject> validator;
+
+    private GenericListWriter<IdentifiableDataObject, DataObjectIdentifier> writer;
 
     @Before
     public void setUp() throws Exception {
         MockitoAnnotations.initMocks(this);
-        writer = new GenericListWriter<>(DATA_OBJECT_ID, customizer);
+        writer = new GenericListWriter<>(DATA_OBJECT_ID, customizer, validator);
         when(before.getKey()).thenReturn(beforeKey);
         when(after.getKey()).thenReturn(keyAfter);
     }
@@ -106,4 +110,25 @@ public class GenericListWriterTest {
         writer = new GenericListWriter<>(DATA_OBJECT_ID, customizer);
         writer.deleteCurrentAttributes(DATA_OBJECT_ID, before, ctx);
     }
+
+    @Test
+    public void testValidate() throws Exception {
+        assertEquals(DATA_OBJECT_ID, writer.getManagedDataObjectType());
+
+        final InstanceIdentifier<IdentifiableDataObject> keyedIdBefore =
+            (InstanceIdentifier<IdentifiableDataObject>) InstanceIdentifier.create(Collections
+                .singleton(new InstanceIdentifier.IdentifiableItem<>(IdentifiableDataObject.class, beforeKey)));
+        final InstanceIdentifier<IdentifiableDataObject> keyedIdAfter =
+            (InstanceIdentifier<IdentifiableDataObject>) InstanceIdentifier.create(Collections
+                .singleton(new InstanceIdentifier.IdentifiableItem<>(IdentifiableDataObject.class, keyAfter)));
+
+        writer.validate(DATA_OBJECT_ID, before, after, ctx);
+        verify(validator).validateUpdate(keyedIdBefore, before, after, ctx);
+
+        writer.validate(DATA_OBJECT_ID, before, null, ctx);
+        verify(validator).validateDelete(keyedIdBefore, before, ctx);
+
+        writer.validate(DATA_OBJECT_ID, null, after, ctx);
+        verify(validator).validateWrite(keyedIdAfter, after, ctx);
+    }
 }
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