test/utils/StatisticUtils.test.ts

   1 import { expect } from 'expect';
   2
   3 import { average, median, nthPercentile, stdDeviation } from '../../src/utils/StatisticUtils';
   4
   5 describe('StatisticUtils test suite', () => {
   6   it('Verify average()', () => {
   7     expect(average([])).toBe(0);
   8     expect(average([0.08])).toBe(0.08);
   9     expect(average([0.25, 4.75, 3.05, 6.04, 1.01, 2.02, 5.03])).toBe(3.1642857142857146);
  10     expect(average([0.25, 4.75, 3.05, 6.04, 1.01, 2.02])).toBe(2.8533333333333335);
  11   });
  12
  13   it('Verify median()', () => {
  14     expect(median([])).toBe(0);
  15     expect(median([0.08])).toBe(0.08);
  16     expect(median([0.25, 4.75, 3.05, 6.04, 1.01, 2.02, 5.03])).toBe(3.05);
  17     expect(median([0.25, 4.75, 3.05, 6.04, 1.01, 2.02])).toBe(2.535);
  18   });
  19
  20   it('Verify nthPercentile()', () => {
  21     expect(nthPercentile([], 25)).toBe(0);
  22     expect(nthPercentile([0.08], 50)).toBe(0.08);
  23     const array0 = [0.25, 4.75, 3.05, 6.04, 1.01, 2.02, 5.03];
  24     expect(nthPercentile(array0, 0)).toBe(0.25);
  25     expect(nthPercentile(array0, 50)).toBe(3.05);
  26     expect(nthPercentile(array0, 80)).toBe(4.974);
  27     expect(nthPercentile(array0, 85)).toBe(5.131);
  28     expect(nthPercentile(array0, 90)).toBe(5.434);
  29     expect(nthPercentile(array0, 95)).toBe(5.736999999999999);
  30     expect(nthPercentile(array0, 100)).toBe(6.04);
  31   });
  32
  33   it('Verify stdDeviation()', () => {
  34     expect(stdDeviation([0.25, 4.75, 3.05, 6.04, 1.01, 2.02, 5.03])).toBe(2.0256064851429216);
  35   });
  36 });