tests/utils/StatisticUtils.test.ts

   1 import { describe, it } from 'node:test'
   2
   3 import { expect } from 'expect'
   4
   5 import { average, median, nthPercentile, stdDeviation } from '../../src/utils/StatisticUtils.js'
   6
   7 await describe('StatisticUtils test suite', async () => {
   8   await it('Verify average()', () => {
   9     expect(average([])).toBe(0)
  10     expect(average([0.08])).toBe(0.08)
  11     expect(average([0.25, 4.75, 3.05, 6.04, 1.01, 2.02, 5.03])).toBe(3.1642857142857146)
  12     expect(average([0.25, 4.75, 3.05, 6.04, 1.01, 2.02])).toBe(2.8533333333333335)
  13   })
  14
  15   await it('Verify median()', () => {
  16     expect(median([])).toBe(0)
  17     expect(median([0.08])).toBe(0.08)
  18     expect(median([0.25, 4.75, 3.05, 6.04, 1.01, 2.02, 5.03])).toBe(3.05)
  19     expect(median([0.25, 4.75, 3.05, 6.04, 1.01, 2.02])).toBe(2.535)
  20   })
  21
  22   await it('Verify nthPercentile()', () => {
  23     expect(nthPercentile([], 25)).toBe(0)
  24     expect(nthPercentile([0.08], 50)).toBe(0.08)
  25     const array0 = [0.25, 4.75, 3.05, 6.04, 1.01, 2.02, 5.03]
  26     expect(nthPercentile(array0, 0)).toBe(0.25)
  27     expect(nthPercentile(array0, 50)).toBe(3.05)
  28     expect(nthPercentile(array0, 80)).toBe(4.974)
  29     expect(nthPercentile(array0, 85)).toBe(5.131)
  30     expect(nthPercentile(array0, 90)).toBe(5.434)
  31     expect(nthPercentile(array0, 95)).toBe(5.736999999999999)
  32     expect(nthPercentile(array0, 100)).toBe(6.04)
  33   })
  34
  35   await it('Verify stdDeviation()', () => {
  36     expect(stdDeviation([0.25, 4.75, 3.05, 6.04, 1.01, 2.02, 5.03])).toBe(2.1879050645374383)
  37   })
  38 })