plumber-lua-check.lua

local someInputs = {
    pb.value{
        elements = {
            {
                value = a,
                children = {
                    { value = a-a, children = {} },
                    { value = a-b, children = {} }
                }
            },
            {
                value = b,
                children = {
                    { value = b-a, children = {} },
                    { value = b-b, children = {} }
                }
            }
        }
    }
}
 
local whatWeExpect = {
    pb.value{
        elements = {
            { value = a,   id=1, parent=0 },
            { value = a-a, id=2, parent=1 },
            { value = a-b, id=3, parent=1 },
            { value = b,   id=4, parent=0 },
            { value = b-a, id=5, parent=4 },
            { value = b-b, id=6, parent=4 },
        }
    }
}
 
return pb
    .forInputs(someInputs)
    .expectOutputs(whatWeExpect)