Split up transaction chunks

[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / test / java / org / opendaylight / controller / cluster / datastore / persisted / ChunkedOutputStreamTest.java

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/test/java/org/opendaylight/controller/cluster/datastore/persisted/ChunkedOutputStreamTest.java b/opendaylight/md-sal/sal-distributed-datastore/src/test/java/org/opendaylight/controller/cluster/datastore/persisted/ChunkedOutputStreamTest.java
new file mode 100644 (file)
index 0000000..16f7bd8
--- /dev/null
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/test/java/org/opendaylight/controller/cluster/datastore/persisted/ChunkedOutputStreamTest.java
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2019 PANTHEON.tech, s.r.o. 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.controller.cluster.datastore.persisted;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+
+import java.io.IOException;
+import java.util.List;
+import org.junit.Test;
+
+public class ChunkedOutputStreamTest {
+    private static final int INITIAL_SIZE = 256;
+
+    private final ChunkedOutputStream stream = new ChunkedOutputStream(INITIAL_SIZE);
+
+    @Test
+    public void testBasicWrite() throws IOException {
+        for (int i = 0; i < INITIAL_SIZE; ++i) {
+            stream.write(i);
+        }
+
+        final byte[] chunk = assertFinishedStream(INITIAL_SIZE, 1).get(0);
+        assertEquals(INITIAL_SIZE, chunk.length);
+        for (int i = 0; i < INITIAL_SIZE; ++i) {
+            assertEquals((byte) i, chunk[i]);
+        }
+    }
+
+    @Test
+    public void testBasicLargeWrite() throws IOException {
+        final byte[] array = createArray(INITIAL_SIZE);
+        stream.write(array);
+        final byte[] chunk = assertFinishedStream(INITIAL_SIZE, 1).get(0);
+        assertArrayEquals(array, chunk);
+    }
+
+    @Test
+    public void testGrowWrite() throws IOException {
+        for (int i = 0; i < INITIAL_SIZE * 2; ++i) {
+            stream.write(i);
+        }
+
+        final byte[] chunk = assertFinishedStream(INITIAL_SIZE * 2, 1).get(0);
+        assertEquals(INITIAL_SIZE * 2, chunk.length);
+        for (int i = 0; i < INITIAL_SIZE * 2; ++i) {
+            assertEquals((byte) i, chunk[i]);
+        }
+    }
+
+    @Test
+    public void testGrowLargeWrite() throws IOException {
+        final byte[] array = createArray(INITIAL_SIZE * 2);
+        stream.write(array);
+        final byte[] chunk = assertFinishedStream(INITIAL_SIZE * 2, 1).get(0);
+        assertArrayEquals(array, chunk);
+    }
+
+    @Test
+    public void testTwoChunksWrite() throws IOException {
+        int size = ChunkedOutputStream.MAX_ARRAY_SIZE + 1;
+        for (int i = 0; i < size; ++i) {
+            stream.write(i);
+        }
+
+        int counter = 0;
+        for (byte[] chunk: assertFinishedStream(size, 2)) {
+            for (byte actual: chunk) {
+                assertEquals((byte) counter++, actual);
+            }
+        }
+    }
+
+    private List<byte[]> assertFinishedStream(final int expectedSize, final int expectedChunks) {
+        stream.close();
+        final ChunkedByteArray array = stream.toChunkedByteArray();
+        assertEquals(expectedSize, array.size());
+
+        final List<byte[]> chunks = array.getChunks();
+        assertEquals(expectedChunks, chunks.size());
+        return chunks;
+    }
+
+    private static byte[] createArray(final int size) {
+        final byte[] array = new byte[size];
+        for (int i = 0; i < size; ++i) {
+            array[i] = (byte) i;
+        }
+        return array;
+    }
+}