I think in UK if runway is swept to "blacktop" then friction tests are not carried out prior to re-opening as the runway will be normally be wet with de-icer and friction tests on a wet runway are considered to be unreliable. The friction calibrations are carried out on a dry runway using a self wetting device, so provided the calibration results show figures above acceptable levels then then the wet runway braking action should be fine.
If the runway state report gives ice patches, slush etc then operators should apply their SOPs based on the runway state given at the time. CAA document CAP683 on CAA website details the UK guidelines, also the UK AIP GEN section has some information on this.