[jboss-jira] [JBoss JIRA] (DROOLS-1547) Add tests to confirm that singleton lists can be treated as the element itself in filter results

[Edson Tirelli (JIRA)]

Edson Tirelli created DROOLS-1547:
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             Summary: Add tests to confirm that singleton lists can be treated as the element itself in filter results
                 Key: DROOLS-1547
                 URL: https://issues.jboss.org/browse/DROOLS-1547
             Project: Drools
          Issue Type: Bug
          Components: dmn engine
    Affects Versions: 7.0.0.CR3
            Reporter: Edson Tirelli
            Assignee: Edson Tirelli
             Fix For: 7.1.0.Final


The specification has a provision that singleton lists should be treated as the element itself in some cases, like filter results. I.e., in some cases, {{[a] = a}}.

This is not completely consistent, but we need to handle it for some cases, like filter results. In other words, the following assignment should work fine, assuming {{a flight}} is a flight variable and {{flight list}} is a list of flights, and the filter returns a single result.

{
  a flight : flight list[ number = "AC 531" ]
}

We need to add tests to make sure it is working like that and fix it in case it is not.



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