log.warn not present if --verbose not given

[LouisLeNezet]

Hi,

I've stumbled upon the following issue recently.
In the case of a function test giving a warning through log.warn the warning doesn't seems to be produced through the nf-test if --verbose is not set.

Here is a reproducible example:

The function:

def checkMetaChr(chr_a, chr_b, name){
    def intersect = chr_a
        .combine(chr_b)
        .map{
            a, b ->
            if (b != [[]] && !(a - b).isEmpty()) {
                def chr_names = (a - b).size() > params.max_chr_names ? (a - b)[0..params.max_chr_names - 1] + ['...'] : (a - b)
                def verb = (a - b).size() == 1 ? "is" : "are"
                log.warn "Chr : ${chr_names} ${verb} missing from ${name}"
                return (a-b)
            }
            return []
        }
        .flatten()
    return intersect
}

The nf-test file

nextflow_workflow {
    name "Test function"
    script "../main.nf"

    test ("Test checkMetaChr warning") {
            function "checkMetaChr"
            when {
                function {
                    """
                    input[0] = Channel.of([["chr1", "chrY" ]])
                    input[1] = Channel.of([["chr1"]])
                    input[2] = "test"
                    """
                }
            }
            then {
                assertAll (
                    { assert function.success },
                    { assert function.stdout.contains("WARN: Chr : [chrY] is missing from test") }
                )
            }
        }
}

The two commands:

nf-test test main.nf --verbose # works
nf-test test main.nf # doesn't works