JXA (JavaScript for Automation) ‘Script Library’ exports-test

Test Library.js

// Export the mapping to the caller via the *documented* / known-working method
function results(){
   return [ ""
    , "1. Function declaration of the global environment"
    , "2. Implicit propery of the objective global environment"
    , "3. Identifier binding on the objective global environment"
    , "4. Identifier binding on the declarative global environment"
    , "5. Explicit property of the objective global environment (via `this` self-ref)"
    , "6. Explicit property of the objective global environment (via anon func)"
   ]
}

// The documented approach
function one(){                     return true }

// Identifier bindings
         two = function(){          return true }
     var three = function(){        return true }
     let four = function(){         return true }

// Explicit property creation
    this.five = function(){         return true }
;(function(){ return this })()
        .six = function(){          return true }

Test Script.js

#!/usr/bin/env osascript -l JavaScript

const test    = Library('Test Library')
    , results = test.results()

try { test.one()   && console.log('✓ '+results[1]) } catch(e) { console.log('✗ '+results[1]) }
try { test.two()   && console.log('✓ '+results[2]) } catch(e) { console.log('✗ '+results[2]) }
try { test.three() && console.log('✓ '+results[3]) } catch(e) { console.log('✗ '+results[3]) }
try { test.four()  && console.log('✓ '+results[4]) } catch(e) { console.log('✗ '+results[4]) }
try { test.five()  && console.log('✓ '+results[5]) } catch(e) { console.log('✗ '+results[5]) }
try { test.six()   && console.log('✓ '+results[6]) } catch(e) { console.log('✗ '+results[6]) }

test.sh

osacompile -l JavaScript -o "Test Library.scpt" "Test Library.js"
mkdir -p -- "$HOME/Library/Script Libraries/"
mv "Test Library.scpt" "$HOME/Library/Script Libraries/"

osascript -l JavaScript "Test Script.js" || true

rm "$HOME/Library/Script Libraries/Test Library.scpt"