code: @Test public void getMetadataTest() throws IOException {
    for (int k=1; k < Constants.MAX_COLUMNS; k+=Constants.MAX_COLUMNS / 5) {
      int fileId=mTfs.createRawTable("/x/table" + k,1);
      RawTable table=mTfs.getRawTable(fileId);
      Assert.assertEquals(ByteBuffer.allocate(0),table.getMetadata());
      Assert.assertEquals(ByteBuffer.allocate(0),table.getMetadata());
      table=mTfs.getRawTable("/x/table" + k);
      Assert.assertEquals(ByteBuffer.allocate(0),table.getMetadata());
      fileId=mTfs.createRawTable("/y/tab" + k,1,TestUtils.getIncreasingByteBuffer(k % 7));
      table=mTfs.getRawTable(fileId);
      Assert.assertEquals(TestUtils.getIncreasingByteBuffer(k % 7),table.getMetadata());
      Assert.assertEquals(TestUtils.getIncreasingByteBuffer(k % 7),table.getMetadata());
      table=mTfs.getRawTable("/y/tab" + k);
      Assert.assertEquals(TestUtils.getIncreasingByteBuffer(k % 7),table.getMetadata());
      Assert.assertEquals(TestUtils.getIncreasingByteBuffer(k % 7),table.getMetadata());
    }
  }
  