Xpath or xquery and test the order

Using SoapUI (great tool for WS by the way), I have the following xml result :

<code>c</code>
<code>b</code>
<code>a</code>

For this sample above, i would like to test the code value are order asc. Of course, 开发者_运维知识库for this sample the test will fail like excepted.

Any solution with xquery or xpath (i can use groovy inside the test if necessary)

Thanks in advance.

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Use (XQuery or XPath 2.0):

not(code[. > following-sibling::code])

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Two other ways:

empty(
  for $x at $p in code
  where ($x > code[$p + 1])
  return $x
)

and

deep-equal(for $x in code order by $x return $x/data(.), code/data(.))

But Dimitre's answer seems the cleanest.