fix checkstyle.

Author: zhtttylz

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

@@ -222,7 +222,8 @@ public void testCreateRecursiveWithExistingDir(FsPermission umask,
     fc.setUMask(umask);
     createFile(fc, f);
     assertTrue(isFile(fc, f));
-    assertEquals(expectedPerms , fc.getFileStatus(f).getPermission(), "permissions on file are wrong");
+    assertEquals(expectedPerms , fc.getFileStatus(f).getPermission(),
+        "permissions on file are wrong");
   }
 
 

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

@@ -561,7 +561,7 @@ public void testLSOnRootWithFallbackLinkWithSameMountDirectories()
       }
       afterFallback.removeAll(beforeFallback);
       assertEquals(1, afterFallback.size());
-      assertEquals( "user2",afterFallback.iterator().next().getName(),
+      assertEquals("user2",afterFallback.iterator().next().getName(),
           "/user2 dir from fallback should be listed.");
     }
   }

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

@@ -190,8 +190,7 @@ public void testConfLinkMergeSlashWithRegularLinks() throws Exception {
       fail("Shouldn't allow both merge slash link and regular link on same "
           + "mount table.");
     } catch (IOException e) {
-      assertTrue(
-         e.getMessage().contains(expectedErrorMsg1) || e.getMessage()
+      assertTrue(e.getMessage().contains(expectedErrorMsg1) || e.getMessage()
               .contains(expectedErrorMsg2), "Unexpected error message: " + e.getMessage());
     }
   }
@@ -226,7 +225,7 @@ public void testChildFileSystems() throws Exception {
     FileSystem fs = FileSystem.get(viewFsUri, conf);
     FileSystem[] childFs = fs.getChildFileSystems();
     assertEquals(1, childFs.length, "Unexpected number of child filesystems!");
-    assertEquals(
-       DistributedFileSystem.class, childFs[0].getClass(), "Unexpected child filesystem!");
+    assertEquals(DistributedFileSystem.class, childFs[0].getClass(),
+        "Unexpected child filesystem!");
   }
 }

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

@@ -114,9 +114,9 @@ public void testAppend() throws IOException {
   @Override
   @Test
   public void testRenameRootDirForbidden() throws Exception {
-      assertThrows(AccessControlException.class, () -> {
-          super.testRenameRootDirForbidden();
-      });
+    assertThrows(AccessControlException.class, () -> {
+      super.testRenameRootDirForbidden();
+    });
   }
 
   @Override