HDFS-12431. [JDK17] Upgrade JUnit from 4 to 5 in hadoop-hdfs Part4.

Author: zhtttylz

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/tools/TestAdminHelper.java

@@ -17,8 +17,8 @@
  */
 package org.apache.hadoop.hdfs.tools;
 
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
 
 /**
  * Test class to test Admin Helper.
@@ -28,11 +28,10 @@ public class TestAdminHelper {
  @Test
  public void prettifyExceptionWithNpe() {
  String pretty = AdminHelper.prettifyException(new NullPointerException());
- Assert.assertTrue(
+ Assertions.assertTrue(pretty.startsWith("NullPointerException at org.apache.hadoop.hdfs.tools"
+ + ".TestAdminHelper.prettifyExceptionWithNpe"),
  "Prettified exception message doesn't contain the required exception "
- + "message",
- pretty.startsWith("NullPointerException at org.apache.hadoop.hdfs.tools"
- + ".TestAdminHelper.prettifyExceptionWithNpe"));
+ + "message");
  }
 
  @Test
@@ -42,7 +41,7 @@ public void prettifyException() {
  new IllegalArgumentException("Something is wrong",
  new IllegalArgumentException("Something is illegal")));
 
- Assert.assertEquals(
+ Assertions.assertEquals(
  "IllegalArgumentException: Something is wrong",
  pretty);