als-statistics/tests/table/filter.test.js

A powerful and lightweight JavaScript library for descriptive statistics, regression, clustering, outlier detection, and noise analysis using a flexible table/column architecture.

const { describe, it } = require('node:test');
const assert = require('node:assert');
const ColumnFilter = require('../../lib/table/filter');

describe('ColumnFilter', () => {
   it('should correctly apply filters', () => {
      const filter = new ColumnFilter();
      filter.filterRows([2, 3, 4]);
      assert.deepStrictEqual(filter.filtered, { 2: true, 3: true, 4: true });
      assert.strictEqual(filter.count, 3);
      assert.strictEqual(filter.maxFilter, 4);
      assert.strictEqual(filter.filterState, 1);
   });

   it('should correctly clear filters', () => {
      const filter = new ColumnFilter();
      filter.filterRows([1, 2, 3, 4, 5]);
      filter.clearRowsFilters([2, 3, 4]);
      assert.deepStrictEqual(filter.filtered, { 1: true, 5: true });
      assert.strictEqual(filter.count, 2);
      assert.strictEqual(filter.maxFilter, 5);
      assert.strictEqual(filter.filterState, 2);
   });

   it('should reset maxFilter when clearing last filter', () => {
      const filter = new ColumnFilter();
      filter.filterRows([1, 2, 3]);
      filter.clearRowsFilters([1, 2, 3]);
      assert.deepStrictEqual(filter.filtered, {});
      assert.strictEqual(filter.count, 0);
      assert.strictEqual(filter.maxFilter, 0);
   });

   it('should not increment filterState if no new filters are added', () => {
      const filter = new ColumnFilter();
      filter.filterRows([2, 3, 4]);
      const prevState = filter.filterState;
      filter.filterRows([2, 3, 4]);
      assert.strictEqual(filter.filterState, prevState);
   });

   it('should not change filterState if clearing non-existing filters', () => {
      const filter = new ColumnFilter();
      filter.filterRows([2, 3, 4]);
      const prevState = filter.filterState;
      filter.clearRowsFilters([6, 7, 8]);
      assert.strictEqual(filter.filterState, prevState);
   });

   it('should clear all filters completely', () => {
      const filter = new ColumnFilter();
      filter.filterRows([1, 2, 3, 4]);
      filter.clearAllRowsFilters();
      assert.deepStrictEqual(filter.filtered, {});
      assert.strictEqual(filter.count, 0);
      assert.strictEqual(filter.maxFilter, 0);
      assert.strictEqual(filter.filterState, 2);
   });

   it('should initialize filter state with init', () => {
      const filter = new ColumnFilter();
      filter.filterRows([1, 2, 3]);
      filter.init();
      assert.deepStrictEqual(filter.filtered, {});
      assert.strictEqual(filter.count, 0);
      assert.strictEqual(filter.maxFilter, 0);
      assert.strictEqual(filter.filterState, 1); // filterState не сбрасывается в init
   });

   it('should reset state with init', () => {
      const filter = new ColumnFilter();
      filter.filterRows([1, 2]);
      filter.init();
      assert.strictEqual(filter.count, 0);
      assert.strictEqual(filter.maxFilter, 0);
      assert.strictEqual(filter.filterState, 1); // Не увеличивается в init
   });
});