dom/mdsal-dom-spi/src/test/java/org/opendaylight/mdsal/dom/spi/store/SnapshotBackedReadTransactionTest.java

   1 /*
   2  * Copyright (c) 2016 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.mdsal.dom.spi.store;
   9
  10 import static org.hamcrest.CoreMatchers.instanceOf;
  11 import static org.hamcrest.MatcherAssert.assertThat;
  12 import static org.junit.Assert.assertEquals;
  13 import static org.junit.Assert.assertNotNull;
  14 import static org.junit.Assert.assertNull;
  15 import static org.junit.Assert.assertSame;
  16 import static org.junit.Assert.assertThrows;
  17 import static org.junit.Assert.assertTrue;
  18 import static org.mockito.ArgumentMatchers.any;
  19 import static org.mockito.Mockito.doReturn;
  20 import static org.mockito.Mockito.doThrow;
  21 import static org.mockito.Mockito.mock;
  22
  23 import com.google.common.util.concurrent.Futures;
  24 import java.lang.reflect.Field;
  25 import java.util.Optional;
  26 import java.util.concurrent.ExecutionException;
  27 import org.junit.Test;
  28 import org.opendaylight.mdsal.common.api.ReadFailedException;
  29 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  30 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  31 import org.opendaylight.yangtools.yang.data.tree.api.DataTreeSnapshot;
  32
  33 public class SnapshotBackedReadTransactionTest {
  34
  35     private static final DataTreeSnapshot DATA_TREE_SNAPSHOT = mock(DataTreeSnapshot.class);
  36
  37     private SnapshotBackedReadTransaction<Object> snapshotBackedReadTransaction =
  38             new SnapshotBackedReadTransaction<>(new Object(), false, DATA_TREE_SNAPSHOT, null);
  39
  40     @Test
  41     public void basicTest() throws Exception {
  42         final NormalizedNode testNode = mock(NormalizedNode.class);
  43         final Optional<NormalizedNode> optional = Optional.of(testNode);
  44         doReturn("testNode").when(testNode).toString();
  45         doReturn(Optional.of(testNode)).when(DATA_TREE_SNAPSHOT).readNode(YangInstanceIdentifier.of());
  46         assertTrue(snapshotBackedReadTransaction.exists(YangInstanceIdentifier.of()).get());
  47
  48         assertEquals(optional, snapshotBackedReadTransaction.read(YangInstanceIdentifier.of()).get());
  49         final Field stableSnapshotField = SnapshotBackedReadTransaction.class.getDeclaredField("stableSnapshot");
  50         stableSnapshotField.setAccessible(true);
  51
  52         DataTreeSnapshot stableSnapshot = (DataTreeSnapshot) stableSnapshotField.get(snapshotBackedReadTransaction);
  53         assertNotNull(stableSnapshot);
  54         snapshotBackedReadTransaction.close();
  55         stableSnapshot = (DataTreeSnapshot) stableSnapshotField.get(snapshotBackedReadTransaction);
  56         assertNull(stableSnapshot);
  57     }
  58
  59     @Test
  60     public void readTestWithException() {
  61         snapshotBackedReadTransaction.close();
  62         final var future = snapshotBackedReadTransaction.read(YangInstanceIdentifier.of());
  63         final var cause = assertThrows(ExecutionException.class, () -> Futures.getDone(future)).getCause();
  64         assertThat(cause, instanceOf(ReadFailedException.class));
  65         assertEquals("Transaction is closed", cause.getMessage());
  66     }
  67
  68     @Test
  69     public void readNodeTestWithException() {
  70         final var thrown = new NullPointerException("no Node");
  71         doThrow(thrown).when(DATA_TREE_SNAPSHOT).readNode(any());
  72         snapshotBackedReadTransaction = new SnapshotBackedReadTransaction<>(new Object(), false, DATA_TREE_SNAPSHOT,
  73                 null);
  74
  75         final var future = snapshotBackedReadTransaction.read(YangInstanceIdentifier.of());
  76         final var cause = assertThrows(ExecutionException.class, () -> Futures.getDone(future)).getCause();
  77         assertThat(cause, instanceOf(ReadFailedException.class));
  78         assertEquals("Read failed", cause.getMessage());
  79         assertSame(thrown, cause.getCause());
  80     }
  81
  82     @Test
  83     public void existsTestWithException() {
  84         final var thrown = new NullPointerException("no Node");
  85         doThrow(thrown).when(DATA_TREE_SNAPSHOT).readNode(any());
  86
  87         final var future = snapshotBackedReadTransaction.exists(YangInstanceIdentifier.of());
  88         final var cause = assertThrows(ExecutionException.class, () -> Futures.getDone(future)).getCause();
  89         assertThat(cause, instanceOf(ReadFailedException.class));
  90         assertEquals("Read failed", cause.getMessage());
  91         assertSame(thrown, cause.getCause());
  92     }
  93 }