### Question:
TableDataUtil { public static String getSqlValueQuotedString(String value) { Validate.notNull(value, "value must not be null"); return getSqlQuotedString(value, VALUE_QUOTE_SIGN); } private  TableDataUtil(); static String getSqlValueQuotedString(String value); static String getSqlColumnQuotedString(String value);  }### Answer:
@Test public void getSqlValueQuotedStringTest() { Assert.assertEquals(TableDataUtil.getSqlValueQuotedString("tableValue"), "'tableValue'"); }
@Test public void escapeSqlInGetSqlValueQuotedStringTest() { Assert.assertEquals(TableDataUtil.getSqlValueQuotedString("table's value"), "'table''s value'"); }
@Test public void escapeBackslashSymbolInGetSqlValueQuotedStringTest() { Assert.assertEquals(TableDataUtil.getSqlValueQuotedString("\\"), "'\\\\'"); Assert.assertEquals(TableDataUtil.getSqlValueQuotedString("table\\Value"), "'table\\\\Value'"); }