als-statistics/tests/analyze/compare-means/index-oneSample.test.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 { describe, it } from 'node:test';
import assert from 'node:assert';
import { CompareMeans } from '../../../lib/analyze/compare-means/index.js';

describe('CompareMeans.oneSample default column pick', () => {
  it('uses the full first key name, not its first character', () => {
    const data = { Alpha: [1,2,3], Beta: [4,5,6] };
    const cmp = new CompareMeans(data);
   //  const t1 = cmp.oneSample(/* no name => should pick "Alpha" */, 2);
    const t1 = cmp.oneSample(undefined, 2);
    // if bug present (Object.keys(...)[0][0]), it tries key "A" instead of "Alpha" and crashes.
    assert.strictEqual(t1.df, 2);
  });
});