Bug 5947: Increasing code coverage - mdsal-dom-spi

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

diff --git a/dom/mdsal-dom-spi/src/test/java/org/opendaylight/mdsal/dom/spi/store/SnapshotBackedReadTransactionTest.java b/dom/mdsal-dom-spi/src/test/java/org/opendaylight/mdsal/dom/spi/store/SnapshotBackedReadTransactionTest.java
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+++ b/dom/mdsal-dom-spi/src/test/java/org/opendaylight/mdsal/dom/spi/store/SnapshotBackedReadTransactionTest.java
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2016 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.mdsal.dom.spi.store;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+import static org.mockito.Matchers.any;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.doThrow;
+import static org.mockito.Mockito.mock;
+
+import com.google.common.base.Optional;
+import java.lang.reflect.Field;
+import org.junit.Test;
+import org.opendaylight.mdsal.common.api.ReadFailedException;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshot;
+
+public class SnapshotBackedReadTransactionTest {
+
+    private static final DataTreeSnapshot DATA_TREE_SNAPSHOT = mock(DataTreeSnapshot.class);
+    private static SnapshotBackedReadTransaction snapshotBackedReadTransaction =
+            new SnapshotBackedReadTransaction<>(new Object(), false, DATA_TREE_SNAPSHOT);
+
+    @Test
+    public void basicTest() throws Exception {
+        final NormalizedNode<?, ?> testNode = mock(NormalizedNode.class);
+        final Optional<NormalizedNode> optional = Optional.of(testNode);
+        doReturn("testNode").when(testNode).toString();
+        doReturn(optional).when(DATA_TREE_SNAPSHOT).readNode(YangInstanceIdentifier.EMPTY);
+        assertTrue((Boolean) snapshotBackedReadTransaction.exists(YangInstanceIdentifier.EMPTY).get());
+
+        assertEquals(optional, snapshotBackedReadTransaction.read(YangInstanceIdentifier.EMPTY).get());
+
+        final Field stableSnapshotField = SnapshotBackedReadTransaction.class.getDeclaredField("stableSnapshot");
+        stableSnapshotField.setAccessible(true);
+
+        DataTreeSnapshot stableSnapshot = (DataTreeSnapshot) stableSnapshotField.get(snapshotBackedReadTransaction);
+        assertNotNull(stableSnapshot);
+        snapshotBackedReadTransaction.close();
+        stableSnapshot = (DataTreeSnapshot) stableSnapshotField.get(snapshotBackedReadTransaction);
+        assertNull(stableSnapshot);
+    }
+
+    @Test(expected = ReadFailedException.class)
+    public void readTestWithException() throws Throwable {
+        snapshotBackedReadTransaction.close();
+        try {
+            snapshotBackedReadTransaction.read(YangInstanceIdentifier.EMPTY).get();
+            fail("Expected ReadFailedException");
+        } catch (Exception e) {
+            throw e.getCause();
+        }
+    }
+
+    @Test(expected = ReadFailedException.class)
+    public void readNodeTestWithException() throws Throwable {
+        doThrow(new NullPointerException("no Node")).when(DATA_TREE_SNAPSHOT).readNode(any());
+        snapshotBackedReadTransaction = new SnapshotBackedReadTransaction<>(new Object(), false, DATA_TREE_SNAPSHOT);
+        try {
+            snapshotBackedReadTransaction.read(YangInstanceIdentifier.EMPTY).get();
+            fail("Expected ReadFailedException");
+        } catch (Exception e) {
+            throw e.getCause();
+        }
+    }
+
+    @Test(expected = ReadFailedException.class)
+    public void existsTestWithException() throws Throwable {
+        doThrow(new NullPointerException("no Node")).when(DATA_TREE_SNAPSHOT).readNode(any());
+
+        try {
+            snapshotBackedReadTransaction.exists(YangInstanceIdentifier.EMPTY).get();
+            fail("Expected ReadFailedException");
+        } catch (Exception e) {
+            throw e.getCause();
+        }
+    }
+}
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