als-statistics/tests/statistics.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 Statistics from '../lib/index.js';

describe('Statistics.columns(...)', () => {
  it('собирает одноимённые колонки из нескольких таблиц безопасно', () => {
    const S = new Statistics('S');

    const t1 = S.addTable({ id: [1,2,3], age: [10,20,30] }, { name: 't1' });
    const t2 = S.addTable({ id: [4,5,6], salary: [100,200,300] }, { name: 't2' });

    // В t2 нет age, а в t1 нет salary — не должно падать:
    const ages = S.columns('ages', 'age');
    assert.deepEqual(ages.colNames.sort(), ['t1_age'].sort());
    assert.deepEqual(ages.columns['t1_age'].values, [10,20,30]);

    const both = S.columns('both', 'age', 'salary');
    assert.deepEqual(both.colNames.sort(), ['t1_age','t2_salary'].sort());
  });
});