tests/utils/StatisticUtils.test.ts

   1 import { describe, it } from 'node:test'
   2
   3 import { expect } from 'expect'
   4
   5 import { max, min, nthPercentile, stdDeviation } from '../../src/utils/StatisticUtils.js'
   6
   7 await describe('StatisticUtils test suite', async () => {
   8   await it('Verify min()', () => {
   9     expect(min()).toBe(Infinity)
  10     expect(min(0, 1)).toBe(0)
  11     expect(min(1, 0)).toBe(0)
  12     expect(min(0, -1)).toBe(-1)
  13     expect(min(-1, 0)).toBe(-1)
  14   })
  15
  16   await it('Verify max()', () => {
  17     expect(max()).toBe(-Infinity)
  18     expect(max(0, 1)).toBe(1)
  19     expect(max(1, 0)).toBe(1)
  20     expect(max(0, -1)).toBe(0)
  21     expect(max(-1, 0)).toBe(0)
  22   })
  23
  24   await it('Verify nthPercentile()', () => {
  25     expect(nthPercentile([], 25)).toBe(0)
  26     expect(nthPercentile([0.08], 50)).toBe(0.08)
  27     const array0 = [0.25, 4.75, 3.05, 6.04, 1.01, 2.02, 5.03]
  28     expect(nthPercentile(array0, 0)).toBe(0.25)
  29     expect(nthPercentile(array0, 50)).toBe(3.05)
  30     expect(nthPercentile(array0, 80)).toBe(4.974)
  31     expect(nthPercentile(array0, 85)).toBe(5.131)
  32     expect(nthPercentile(array0, 90)).toBe(5.434)
  33     expect(nthPercentile(array0, 95)).toBe(5.736999999999999)
  34     expect(nthPercentile(array0, 100)).toBe(6.04)
  35   })
  36
  37   await it('Verify stdDeviation()', () => {
  38     expect(stdDeviation([0.25, 4.75, 3.05, 6.04, 1.01, 2.02, 5.03])).toBe(2.1879050645374383)
  39   })
  40 })