changing date in xQuery assertion

i am haveing a requirement where we create entries depending on todays date for the next x days every day in a nightly build

when i am doing a xquery assertion i need to verify the correct values for tomorrow for example where tomorrow of course is always changing

this is an example of the resultset xquery:
  I001 | ALOFTGPU | ALOFTGPU | AMEX | 110 | 2009-02-06T00:00:00| CXL1 | DP1 | true | PerAdult
  I001 | ALOFTGPU | ALOFTGPU | AMEX | 115 | 2009-02-07T00:00:00 | CXL2 | DP1 | true | PerAdult
  I001 | ALOFTGPU | ALOFTGPU | AMEX | 95 | 2009-02-08T00:00:00| CXL1 | DP6 | true | PerAdult
  I001 | ALOFTGPU | ALOFTGPU | AMEX | 56 | 2009-02-09T00:00:00 | CXL1 | DP1 | true | PerAdult

so when running the testcase tomorrow the result would look like this:
  I001 | ALOFTGPU | ALOFTGPU | AMEX | 110 | 2009-02-07T00:00:00| CXL1 | DP1 | true | PerAdult
  I001 | ALOFTGPU | ALOFTGPU | AMEX | 115 | 2009-02-08T00:00:00 | CXL2 | DP1 | true | PerAdult
  I001 | ALOFTGPU | ALOFTGPU | AMEX | 95 | 2009-02-09T00:00:00| CXL1 | DP6 | true | PerAdult
  I001 | ALOFTGPU | ALOFTGPU | AMEX | 56 | 2009-02-10T00:00:00 | CXL1 | DP1 | true | PerAdult

how can i dynamically change the date in the expected resultset to always start with either todays date or todaysdate plus 7 days

thanks for the help

christoph