The Swiss franc appreciated vis-à-vis the U.S. dollar today as the greenback tested bids around the CHF 1.0530 level and was capped around the CHF 1.0615 level.  Data to be released in Switzerland tomorrow include the March producer and import price index. On Friday, Swiss National Bank Governing Board member Danthine said avoiding inflation is a medium-term challenge.  Data released in Switzerland last week saw the March unemployment rate decline to 4.2% from 4.4% in February.  U.S. dollar offers are cited around the CHF 1.0920 level.  The euro moved lower vis-à-vis the Swiss franc as the single currency tested bids around the CHF 1.4380 level while the British pound moved lower vis-à-vis the Swiss franc and tested bids around the CHF 1.6270 level.