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export function mysteryBox(callExpression) {
console.log(callExpression.log);
// get arguments
const [ countNode ] = callExpression.arguments;
const countString: string = countNode.get();
const count: number = parseInt(countString, 10);
// validate
if(!(count >= 1 && count <= 1000)) return new Error(`Argument ${countString} is expected to be between 1 and 1000`);
// return a value
return (Math.random() * count)|0;
}
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