1 |
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2 |
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3 | const chai = require('chai')
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4 | const expect = chai.expect
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5 | const calculateGrowthCurve = require('./../lib/components/services/rankings/calculate-growth-curve')
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6 | const growthCurveIntersection = require('./../lib/components/services/rankings/growth-curve-intersection')
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7 |
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8 | describe('calculated risk score', () => {
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9 | const growthCurves = [
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10 | {
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11 | maxScore: 146,
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12 | meanRisk: 79,
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13 | highRiskThreshold: 98,
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14 | exp: -0.0025,
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15 | expectedDays: 220
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16 | },
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17 | {
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18 | maxScore: 146,
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19 | meanRisk: 79,
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20 | highRiskThreshold: 98,
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21 | exp: -0.0004,
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22 | expectedDays: 1372
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23 | },
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24 | {
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25 | maxScore: 146,
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26 | meanRisk: 79,
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27 | highRiskThreshold: 98,
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28 | exp: -0.00088,
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29 | expectedDays: 624
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30 | }
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31 | ]
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32 |
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33 | for (const curves of growthCurves) {
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34 | const {
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35 | maxScore,
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36 | meanRisk,
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37 | highRiskThreshold,
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38 | exp,
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39 | expectedDays
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40 | } = curves
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41 |
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42 | it(`${meanRisk} to ${highRiskThreshold} with exp = ${exp} takes ${expectedDays} days`, () => {
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43 | const baseline = growthCurveIntersection(maxScore, meanRisk, exp)
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44 | const target = growthCurveIntersection(maxScore, highRiskThreshold, exp)
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45 |
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46 | const daysElapsed = target - baseline
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47 |
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48 | expect(daysElapsed).to.equal(expectedDays)
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49 | })
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50 | }
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51 |
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52 | for (const curves of growthCurves) {
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53 | const {
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54 | maxScore: assessedScore,
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55 | meanRisk: temporaryScore,
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56 | highRiskThreshold: expectedScore,
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57 | exp,
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58 | expectedDays: elapsedDays
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59 | } = curves
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60 |
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61 | it(`TRS of ${temporaryScore} with exp = ${exp} after ${elapsedDays} days is ${expectedScore}`, () => {
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62 | const dayOffset = growthCurveIntersection(assessedScore, temporaryScore, exp)
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63 |
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64 | const effectiveDaysElapsed = elapsedDays + dayOffset
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65 |
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66 | const modifiedScore = calculateGrowthCurve(exp, effectiveDaysElapsed, assessedScore)
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67 |
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68 | expect(Math.round(modifiedScore)).to.equal(expectedScore)
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69 | })
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70 | }
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71 | })
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