HADOOP-18093. Better exception handling for testFileStatusOnMountLink() in ViewFsBaseTest.java (#3918). Contributed by Xing Lin. (#3931)

Signed-off-by: Ayush Saxena <ayushsaxena@apache.org>
(cherry picked from commit 0d17b62)

Author: xinglin

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/viewfs/ViewFsBaseTest.java

@@ -521,7 +521,7 @@ public void testListOnInternalDirsOfMountTable() throws IOException {
         Assert.assertTrue("A mount should appear as symlink", fs.isSymlink());
   }
 
-  @Test
+  @Test(expected = FileNotFoundException.class)
   public void testFileStatusOnMountLink() throws IOException {
     Assert.assertTrue("Slash should appear as dir", 
         fcView.getFileStatus(new Path("/")).isDirectory());
@@ -533,12 +533,7 @@ public void testFileStatusOnMountLink() throws IOException {
     checkFileStatus(fcView, "/internalDir/internalDir2/linkToDir3", fileType.isDir);
     checkFileStatus(fcView, "/linkToAFile", fileType.isFile);
 
-    try {
-      fcView.getFileStatus(new Path("/danglingLink"));
-      Assert.fail("Excepted a not found exception here");
-    } catch ( FileNotFoundException e) {
-      // as excepted
-    }
+    fcView.getFileStatus(new Path("/danglingLink"));
   }
 
   @Test