[Feature] unit test for consistency of property editors [sf#44]

[patrickwestphal]

Reported by jenslehmann on 2011-08-18 08:31 UTC
There should be a unit test for the various implementations of the PropertyEditor interface in DL-Learner, which checks whether setAsText and getAsText are consistent, i.e. first calling setAsTest(String) and then getAsText should result in the same string for all editors and all valid strings.