[GitHub] [iotdb] 5Reasons commented on a change in pull request #1890: Finish DIFF encoding algorithm which is reserved in enum before

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5Reasons commented on a change in pull request #1890:
URL: https://github.com/apache/iotdb/pull/1890#discussion_r514197949



##########
File path: tsfile/src/test/java/org/apache/iotdb/tsfile/encoding/decoder/delta/DiffEncoderIntegerTest.java
##########
@@ -0,0 +1,132 @@
+/*
+ * 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.iotdb.tsfile.encoding.decoder.delta;
+
+import org.apache.iotdb.tsfile.encoding.decoder.DiffDecoder;
+import org.apache.iotdb.tsfile.encoding.encoder.DiffEncoder;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.Random;
+
+import static org.junit.Assert.assertEquals;
+
+public class DiffEncoderIntegerTest {
+
+  private static final int ROW_NUM = 100_000_00;//行数，数组的大小
+  ByteArrayOutputStream out;
+  private DiffEncoder writer;
+  private DiffDecoder reader;
+  private Random ran = new Random();
+  private ByteBuffer buffer;
+
+  @Before
+  public void test() {
+    writer = new DiffEncoder.IntDeltaEncoder();
+    reader = new DiffDecoder.IntDeltaDecoder();
+  }
+
+  @Test
+  public void testBasic() throws IOException {
+    int data[] = new int[ROW_NUM];
+    for (int i = 0; i < ROW_NUM; i++) {
+      data[i] = i * i;
+    }
+    shouldReadAndWrite(data, ROW_NUM);
+  }
+
+  @Test
+  public void testBoundInt() throws IOException {
+    int data[] = new int[ROW_NUM];
+    for (int i = 0; i < 10; i++) {
+      boundInt(i, data);
+    }
+  }
+
+  private void boundInt(int power, int[] data) throws IOException {
+    for (int i = 0; i < ROW_NUM; i++) {
+      data[i] = ran.nextInt((int) Math.pow(2, power));
+    }
+    shouldReadAndWrite(data, ROW_NUM);
+  }
+
+  @Test
+  public void testRandom() throws IOException {
+    int data[] = new int[ROW_NUM];
+    for (int i = 0; i < ROW_NUM; i++) {
+      data[i] = ran.nextInt();
+      System.out.printf("%d ",data[i]);

Review comment:
       Sorry for not finding the problems before submitting. I will fix them.




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