<div></div>
<value-scope return="[string]"> <array-new type="string"> <array-append value="A"> <array-append value="B"> </value-scope> <value-scope return="[string]"> <array-new type="string"> <array-append value="X"> <array-append value="Y"> </value-scope> <array-append-array> <array-join separator=","> <assert-equal value="X,Y,A,B" type="string">