Incorporated comments review 1560: - Introduced random.NextEnumValue for tests that should assert all the valid enum values - Introduced missing test to verify behaviour when invalid WellKnownTileSource enum value is present in the BackgroundData.Parameters dictionary - Renamed tests - Added documentation about the possible exceptions in the XMLDoc Related to Issue [WTI-1141] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@8892 5a3db67b-de53-47b5-99c8-a1c30a6650e2