test/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';
   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(2.0256064851429216);
  37   });
  38 });