92 lines
2.1 KiB
JavaScript
92 lines
2.1 KiB
JavaScript
import { expect } from 'chai'
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import Engine from '../source/index'
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import co2 from './rules/co2.yaml'
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describe('library', function () {
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it('should let the user define its own rule', function () {
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let rules = `
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yo:
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formule: 200
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ya:
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formule: yo + 1
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yi:
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formule: yo + 2
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`
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let engine = new Engine(rules)
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expect(engine.evaluate('ya').nodeValue).to.equal(201)
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expect(engine.evaluate('yi').nodeValue).to.equal(202)
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})
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it('should let the user define a simplified revenue tax system', function () {
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let rules = `
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revenu imposable:
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question: Quel est votre revenu imposable ?
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unité: €
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revenu abattu:
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formule:
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allègement:
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assiette: revenu imposable
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abattement: 10%
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impôt sur le revenu:
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formule:
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barème:
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assiette: revenu abattu
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tranches:
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- taux: 0%
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plafond: 9807 €
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- taux: 14%
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plafond: 27086 €
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- taux: 30%
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plafond: 72617 €
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- taux: 41%
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plafond: 153783 €
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- taux: 45%
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impôt sur le revenu à payer:
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formule:
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allègement:
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assiette: impôt sur le revenu
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abattement:
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valeur: 1177 - (75% * impôt sur le revenu)
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plancher: 0
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`
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let engine = new Engine(rules)
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engine.setSituation({
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'revenu imposable': '48000',
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})
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let value = engine.evaluate('impôt sur le revenu à payer')
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expect(value.nodeValue).to.equal(7253.26)
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})
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it('should let the user define a rule base on a completely different subject', function () {
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let engine = new Engine(co2)
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engine.setSituation({
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'nombre de douches': 30,
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'chauffage . type': "'gaz'",
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'durée de la douche': 10,
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})
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let value = engine.evaluate('douche . impact')
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expect(value.nodeValue).to.be.within(20, 21)
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})
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it('should let the user reference rules in the situation', function () {
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let rules = `
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referenced in situation:
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formule: 200
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overwrited in situation:
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formule: 100
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result:
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formule: overwrited in situation + 22
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`
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let engine = new Engine(rules)
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engine.setSituation({
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'overwrited in situation': 'referenced in situation',
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})
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expect(engine.evaluate('result').nodeValue).to.equal(222)
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})
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})
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