[GitHub] [iotdb] samperson1997 commented on a change in pull request #1808: [IOTDB-936] Refactor getAllDevices in TsFileSequenceReader

[GitBox <gi...@apache.org>]

samperson1997 commented on a change in pull request #1808:
URL: https://github.com/apache/iotdb/pull/1808#discussion_r501679277



##########
File path: tsfile/src/test/java/org/apache/iotdb/tsfile/read/GetAllDevicesTest.java
##########
@@ -0,0 +1,88 @@
+/*
+ * 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.read;
+
+import java.io.IOException;
+import java.util.List;
+import org.apache.iotdb.tsfile.common.conf.TSFileConfig;
+import org.apache.iotdb.tsfile.common.conf.TSFileDescriptor;
+import org.apache.iotdb.tsfile.utils.FileGenerator;
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+public class GetAllDevicesTest {
+
+  private final TSFileConfig conf = TSFileDescriptor.getInstance().getConfig();
+  private int maxDegreeOfIndexNode;
+  private static final String FILE_PATH = FileGenerator.outputDataFile;
+
+  @Before
+  public void before() {
+    maxDegreeOfIndexNode = conf.getMaxDegreeOfIndexNode();
+    conf.setMaxDegreeOfIndexNode(3);
+  }
+
+  @After
+  public void after() throws IOException {
+    FileGenerator.after();
+    conf.setMaxDegreeOfIndexNode(maxDegreeOfIndexNode);
+  }
+
+  @Test
+  public void testGetAllDevices1() throws IOException {
+    testGetAllDevices(2, 2);
+  }
+
+  @Test
+  public void testGetAllDevices2() throws IOException {
+    testGetAllDevices(2, 50);
+  }
+
+  @Test
+  public void testGetAllDevices3() throws IOException {
+    testGetAllDevices(50, 2);
+  }
+
+  @Test
+  public void testGetAllDevices4() throws IOException {
+    testGetAllDevices(50, 50);
+  }
+
+  public void testGetAllDevices(int deviceNum, int measurementNum) throws IOException {
+    FileGenerator.generateFile(10000, deviceNum, measurementNum);
+    TsFileSequenceReader fileReader = new TsFileSequenceReader(FILE_PATH);
+    ReadOnlyTsFile tsFile = new ReadOnlyTsFile(fileReader);
+
+    // test
+    TsFileSequenceReader reader = new TsFileSequenceReader(FILE_PATH);

Review comment:
       Thanks!!!!!




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