'Vector VRL Unit testing returning undefined fuction for strlen

https://vector.dev/docs/reference/vrl/functions/#strlen Hello everyone I have a transform containing this field and everything is working well and logs are good :

    .msg = slice(.message, start: int!(strlen(join!(arrayvar, separator: " "))) , end: int!(strlen(.message))) ?? "undefined"

BUT unit testing return undefined function did you mean "string"? on strlen function.

Anyone has an idea please?

logging yaml datadog

Solution 1:^[1]

Which version of Vector are you running? That function was added in v0.21.0.

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Solution	Source
Solution 1	j.szwedko