[jboss-jira] [JBoss JIRA] (DROOLS-1733) Enhance test coverage of FEEL built-in functions

Enhance test coverage of FEEL built-in functions ------------------------------------------------ Key: DROOLS-1733 URL: https://issues.jboss.org/browse/DROOLS-1733 Project: Drools Issue Type: Bug Components: dmn engine Affects Versions: 7.3.0.Final Reporter: Tibor Zimányi Assignee: Tibor Zimányi Labels: reported-by-qe Fix For: 7.3.1.Final Majority of classes in module kie-dmn-feel in package org.kie.dmn.feel.runtime.functions can be tested by unit tests. Having such tests we can cover nearly 100% of these classes. While coding these tests I found and fixed these bugs and problems: * Rounding problem in EvalHelper.getBigDecimalOrNull() method - The method used .doubleValue() call which produced rounding errors. * AnyFunction and AllFunction didn't check if the items in the list parameter are all Booleans (they must be according to the spec.) * ConcatenateFunction didn't check for nulls in the list parameter * EqualsFunction didn't compare BigDecimals with compareTo() method (which checks just values and ignores scale) * MinFunction and MaxFunction didn't check if the items in the list parameter are comparable * NumberFunction - split of one error message into two * ReplaceFunction - NPE when having replacement param as null * StringFunction and CodeFunction contained duplicated code * SublistFunction - it was possible to input negative length as parameter * ReplaceFunction now handles regexp flags I will create a PR with new tests and fixes for mentioned things.