safe-evaluate-expression/test/evaluate.js

Small library to dynamically create and evaluate expression with multiple parameters (even undefined)

const test = require('ava');
const evaluate = require('..');
const { operators } = require('..');

const vars = { a: 1, b: 1, c: 2, when_current_hour: 12 };
const params = { ...vars, ...operators };

test('isEqual(a,b)', (t) => t.true(evaluate('isEqual(a,b)', params)));
test('isEqual(a,c)', (t) => t.false(evaluate('isEqual(a,c)', params)));
test('isEqual(a,notDefined)', (t) => t.false(evaluate('isEqual(a,notDefined)', params)));
test('isUndefined(a)', (t) => t.false(evaluate('isUndefined(a)', params)));
test('isUndefined(notDefined)', (t) => t.true(evaluate('isUndefined(notDefined)', params)));
test('(isUndefined(notDefined) || (isGreater(c, a) && isLower(b, c))) && isEqual(a,1)', (t) =>
  t.true(
    evaluate(
      '(isUndefined(notDefined) || (isGreater(c, a) && isLower(b, c))) && isEqual(a,1)',
      params,
    ),
  ));