als-statistics/tests/golden/_approx.js

Modular JS statistics toolkit for Node.js and the browser: descriptive stats, correlations (Pearson/Spearman/Kendall), t-tests & ANOVA (Student/Welch), reliability (Cronbach’s alpha), regression (linear/logistic), clustering (DBSCAN/HDBSCAN), and table/co

import assert from 'node:assert/strict';
export const relEps = (eps=1e-8) => (a,b) => {
  if(a === undefined && b === undefined) {
    assert(true)
  }
  else assert.ok(
    Number.isFinite(a) && Number.isFinite(b) &&
    Math.abs(a - b) <= eps * (1 + Math.max(Math.abs(a), Math.abs(b))),
    `Expected ~ ${b}, got ${a}`
  );
}
export const approx1e8 = relEps(1e-8);
export const approx1e6 = relEps(1e-6);