feedback review.

Author: zhangshuyan0

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/fs/viewfs/TestViewFileSystemClose.java

@@ -17,26 +17,26 @@
  */
 package org.apache.hadoop.fs.viewfs;
 
+import static org.apache.hadoop.test.LambdaTestUtils.intercept;
+
+import java.io.IOException;
+
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.FsConstants;
 import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.test.AbstractHadoopTestBase;
 import org.junit.Test;
 
-import java.io.IOException;
-
-import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
-
-public class TestViewFileSystemClose {
+public class TestViewFileSystemClose extends AbstractHadoopTestBase {
 
   /**
    * Verify that all child file systems of a ViewFileSystem will be shut down
    * when the cache is disabled.
    * @throws IOException
    */
   @Test
-  public void testFileSystemLeak() throws IOException {
+  public void testFileSystemLeak() throws Exception {
 
     Configuration conf = new Configuration();
     conf.set("fs.viewfs.impl", ViewFileSystem.class.getName());
@@ -53,12 +53,9 @@ public void testFileSystemLeak() throws IOException {
     viewFs.close();
     FileSystem.closeAll();
     for (FileSystem fs : children) {
-      try {
-        fs.create(new Path(rootPath, "neverSuccess"));
-        fail();
-      } catch (IOException ioe) {
-        assertTrue(ioe.getMessage().contains("Filesystem closed"));
-      }
+      intercept(IOException.class, "Filesystem closed",
+          "Expect Filesystem closed IOException",
+          () -> fs.create(new Path(rootPath, "neverSuccess")));
     }
   }
 }