feat: The invocation of a non-existing function returns null

camunda / feel-scala

FEEL parser and interpreter written in Scala

https://camunda.github.io/feel-scala/

Apache License 2.0

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Closed saig0 closed 1 year ago

saig0 commented 1 year ago

Change the behavior of the engine if an expression invokes a non-existing function. Instead of failing the evaluation, the invocation returns null.
Additionally, the evaluation reports a failure that the function doesn't exist.
Extend and refactor the test cases for the function invocation to verify the evaluation result and the reported failures.

closes #670

saig0 commented 1 year ago

@nicpuppa thank you for your fast review. :cake:

We must remember to refactor the other test cases to the new standard

Yes. Let's migrate the other tests step-by-step when we're touching them. :rocket:

Is there any docs to update?

No. But I will add more details about the handling of null when working on https://github.com/camunda/feel-scala/issues/581. :+1: