@Override
  public String getName() {
    return _name;
  }
@Test
  public void testMd5TransformFunction() {
    ExpressionContext expression = RequestContextUtils.getExpression(String.format("md5(%s)", BYTES_SV_COLUMN));
    TransformFunction transformFunction = TransformFunctionFactory.get(expression, _dataSourceMap);
    assertTrue(transformFunction instanceof ScalarTransformFunctionWrapper);
    assertEquals(transformFunction.getName(), "md5");
    String[] expectedValues = new String[NUM_ROWS];
    for (int i = 0; i < NUM_ROWS; i++) {
      expectedValues[i] = DigestUtils.md5Hex(_bytesSVValues[i]);
    }
    testTransformFunction(transformFunction, expectedValues);
  }