Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/9206#discussion_r43478074
--- Diff:
network/common/src/test/java/org/apache/spark/network/util/TransportFrameDecoderSuite.java
---
@@ -0,0 +1,173 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.network.util;
+
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
+import io.netty.channel.ChannelHandlerContext;
+import org.junit.Test;
+import static org.junit.Assert.*;
+import static org.mockito.Mockito.*;
+
+public class TransportFrameDecoderSuite {
+
+ @Test
+ public void testFrameDecoding() throws Exception {
+ Random rnd = new Random();
+ TransportFrameDecoder decoder = new TransportFrameDecoder();
+ ChannelHandlerContext ctx = mock(ChannelHandlerContext.class);
+
+ List<ByteBuf> buffers = new ArrayList<>();
+ for (int i = 0; i < 100; i++) {
+ // Create two buffers; the first one will be large enough to contain
the first full
+ // frame and maybe a few bytes of the second frame.
+ byte[] data1 = new byte[1024 * (rnd.nextInt(31) + 1)];
+ byte[] data2 = new byte[1024 * (rnd.nextInt(31) + 1)];
+ int totalSize = 2 * 8 + data1.length + data2.length;
+ int size1 = 8 + data1.length + 8 * (rnd.nextInt(data2.length / 2) /
8);
+ int size2 = totalSize - size1;
+
+ assertTrue(size1 >= data1.length + 8);
+ assertTrue(size2 > 8);
+
+ ByteBuf buf1 = Unpooled.buffer(size1);
+ ByteBuf buf2 = Unpooled.buffer(size2);
+
+ buf1.writeLong(data1.length + 8);
+ buf1.writeBytes(data1);
+
+ int remaining = size1 - data1.length - 8;
+ assertTrue(remaining % 8 == 0);
+ if (remaining >= 8) {
+ buf1.writeLong(data2.length + 8);
+ remaining -= 8;
+ } else {
+ buf2.writeLong(data2.length + 8);
+ }
+
+ if (remaining > 0) {
+ buf1.writeBytes(data2, 0, remaining);
+ }
+ buf2.writeBytes(data2, remaining, data2.length - remaining);
+ buffers.add(buf1);
+ buffers.add(buf2);
+ }
+
+ try {
+ for (ByteBuf buf : buffers) {
+ decoder.channelRead(ctx, buf);
+ }
+
+ verify(ctx,
times(buffers.size())).fireChannelRead(any(ByteBuf.class));
--- End diff --
yeah, I'll change it. it just happens that the number of buffers and number
of frames matches, and it would be better if they didn't.
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