als-statistics/tests/column/prepare-extra.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 Column from '../../lib/column/index.js';
import { prepare } from '../../lib/column/prepare.js';

describe('column/prepare', () => {
  it('accepts Column instance and inherits labels when labels not provided', () => {
    // const col = new Column([1, NaN, 3], 'A', ['x','y','z']);
    // const { values, labels, invalid } = col;
    const { values, labels, invalid } = prepare([1, NaN, 3],['x','y','z']);
    assert.deepStrictEqual(values, [1,3]);
    assert.deepStrictEqual(labels, ['x','y','z']); // взяты из Column
    assert.deepStrictEqual(invalid, [1]);
  });

  it('auto-generates numeric values when only labels provided', () => {
    const { values, labels, invalid } = prepare(undefined, ['a','b','c','d']);
    assert.deepStrictEqual(values, [0,1,2,3]);
    assert.deepStrictEqual(labels, ['a','b','c','d']);
    assert.deepStrictEqual(invalid, []);
  });
});