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https://github.com/betagouv/mon-entreprise
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1e7730dd25
Ajout de tests de non-regressions des calculs afin d'éviter de déployer silencieusement des effets de bord non-désirés dans les règles de calculs. J'ai ajouté Jest pour sa fonction de snapshot testing qui est particulièrement adaptée pour ce type de cas (voir #717). J'ai essayé avec mocha-snapshot sans succès. J'ai eu un petit peu de mal à configurer Jest, car il n'est pas possible de ré-utiliser la configuration Webpack, qu'il faut alors dupliquer. C'est pourquoi j'ai limité l'utilisation de Jest aux seuls tests de snapshot. À voir s'il y a un intérêt à migrer les tests Mocha vers Jest ultérieurement. Fixes #717
73 lines
2.8 KiB
JavaScript
73 lines
2.8 KiB
JavaScript
// The goal of these tests is to avoid deploying unwanted changes in the calculations. We run a number
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// of simulations and persist their results in a snapshot (ie, a file commited in git). Our test runner,
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// Jest, then compare the existing snapshot with the current Engine calculation and reports any difference.
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//
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// We only persist goals values in the file system, in order to be resilient to rule renaming (if a rule is
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// renamed the test configuration may be adapted but the persisted snapshot will remain unchanged).
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/* eslint-disable no-undef */
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import Lib from '../../source/engine/index'
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import employeeConfig from '../../source/components/simulationConfigs/salarié.yaml'
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import independantConfig from '../../source/components/simulationConfigs/indépendant.yaml'
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import autoentrepreneurConfig from '../../source/components/simulationConfigs/auto-entrepreneur.yaml'
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import remunerationDirigeantConfig from '../../source/components/simulationConfigs/rémunération-dirigeant.yaml'
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import employeeSituations from './simulations-salarié.yaml'
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import independentSituations from './simulations-indépendant.yaml'
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import autoEntrepreneurSituations from './simulations-auto-entrepreneur.yaml'
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import remunerationDirigeantSituations from './simulations-rémunération-dirigeant.yaml'
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const roundResult = arr => arr.map(x => Math.round(x))
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const runSimulations = (
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situations,
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goals,
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baseSituation = {},
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namePrefix = ''
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) =>
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Object.entries(situations).map(([name, situations]) =>
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situations.forEach(situation => {
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const res = Lib.evaluate(goals, { ...baseSituation, ...situation })
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// Stringify is not required, but allows the result to be displayed in a single
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// line in the snapshot, which considerably reduce the number of lines of this snapshot
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// and improve its readability.
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expect(JSON.stringify(roundResult(res))).toMatchSnapshot(
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namePrefix + name
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)
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})
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)
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it('calculate simulations-salarié', () => {
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runSimulations(
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employeeSituations,
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employeeConfig.objectifs,
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employeeConfig.situation
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)
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})
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it('calculate simulations-indépendant', () => {
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const goals = independantConfig.objectifs.reduce(
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(acc, cur) => [...acc, ...cur.objectifs],
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[]
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)
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runSimulations(independentSituations, goals, independantConfig.situation)
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})
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it('calculate simulations-auto-entrepreneur', () => {
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runSimulations(
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autoEntrepreneurSituations,
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autoentrepreneurConfig.objectifs,
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autoentrepreneurConfig.situation
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)
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})
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it('calculate simulations-rémunération-dirigeant', () => {
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const baseSituation = remunerationDirigeantConfig.situation
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remunerationDirigeantConfig.branches.forEach(({ nom, situation }) => {
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runSimulations(
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remunerationDirigeantSituations,
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remunerationDirigeantConfig.objectifs,
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{ ...baseSituation, ...situation },
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`${nom} - `
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)
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})
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})
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