Formula evaluation of formula using len() function not working properly

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Category

[x] Bug

Version

Please specify what version of the library you are using: [ 3.20.0 ]

If you are not using the latest release, please update and see if the issue is resolved before submitting an issue.

Expected / Desired Behavior / Question

Proper evaluation of validation formula =len(internalColumnName)>6

Observed Behavior

Considers strings with length >6 to be not valid.

Steps to Reproduce

Add column with validation formula =len(internalColumnName)>6, check how it does not consider strings that are longer than 6 as valid even though the default SharePoint form does

https://github.com/pnp/sp-dev-fx-controls-react/blob/5d17c0393e79ff3cb06996480ed07f28e262334c/src/common/utilities/FormulaEvaluation.ts#L538

Here length is used as length function, but it should be len as far as I understand (https://support.microsoft.com/en-us/office/len-function-038f2e0d-57d3-4f35-ae74-9a79d66e8fc2)

Start at src/common/utilities/FormulaEvaluation.ts around line 538, where the reported formula function is handled. Reproduce the issue with =len(internalColumnName)>6 and compare its result with the default SharePoint form. Done means strings longer than six characters are accepted as valid by the evaluator.