[hadoop] 27/50: HDFS-13925. Unit Test for transitioning between different states. Contributed by Sherwood Zheng.

[cl...@apache.org]

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commit 8eef380af74bd6ff972e2449ad2cbebd1653ddc1
Author: Konstantin V Shvachko <sh...@apache.org>
AuthorDate: Tue Oct 16 16:35:02 2018 -0700

    HDFS-13925. Unit Test for transitioning between different states. Contributed by Sherwood Zheng.
---
 .../hdfs/server/namenode/ha/TestObserverNode.java  | 23 ++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestObserverNode.java b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestObserverNode.java
index 28fd330..b18c5b8 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestObserverNode.java
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestObserverNode.java
@@ -20,6 +20,7 @@ package org.apache.hadoop.hdfs.server.namenode.ha;
 import static org.apache.hadoop.hdfs.server.namenode.NameNodeAdapter.getServiceState;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
 import static org.mockito.Matchers.any;
 import static org.mockito.Matchers.anyBoolean;
 import static org.mockito.Matchers.anyLong;
@@ -30,11 +31,13 @@ import java.io.IOException;
 import java.net.URI;
 import java.util.ArrayList;
 import java.util.List;
+
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileUtil;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.fs.permission.FsPermission;
 import org.apache.hadoop.ha.HAServiceProtocol.HAServiceState;
+import org.apache.hadoop.ha.ServiceFailedException;
 import org.apache.hadoop.hdfs.DistributedFileSystem;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.apache.hadoop.hdfs.protocol.Block;
@@ -100,6 +103,26 @@ public class TestObserverNode {
   }
 
   @Test
+  public void testNoActiveToObserver() throws Exception {
+    try {
+      dfsCluster.transitionToObserver(0);
+    } catch (ServiceFailedException e) {
+      return;
+    }
+    fail("active cannot be transitioned to observer");
+  }
+
+  @Test
+  public void testNoObserverToActive() throws Exception {
+    try {
+      dfsCluster.transitionToActive(2);
+    } catch (ServiceFailedException e) {
+      return;
+    }
+    fail("observer cannot be transitioned to active");
+  }
+
+  @Test
   public void testSimpleRead() throws Exception {
     Path testPath2 = new Path(testPath, "test2");
 


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