@technobuddha/library/src/fuzzy-match.test.ts

A large library of useful functions

import { fuzzyMatch } from './fuzzy-match.ts';

describe('fuzzyMatch', () => {
  test('Detect difference between two strings', () => {
    expect(fuzzyMatch('Drink Coca Cola', 'Drink Pepsi Cola')).toBe(0.6049568965517242);
    expect(fuzzyMatch('Drink Coca Cola', 'DRINK PEPSI COLA')).toBe(0.6049568965517242);
  });

  test('Support case sensitive option', () => {
    expect(
      fuzzyMatch('Drink Coca Cola', 'DRINK PEPSI COLA', { caseInsensitive: false }),
    ).toBeCloseTo(0.2019396551724138);
  });

  test('use weighs', () => {
    expect(
      fuzzyMatch('Drink Coca Cola', 'Drink Pepsi Cola', { weightLevenshteinDistance: 10 }),
    ).toBe(0.6324712643678161);
    expect(fuzzyMatch('Drink Coca Cola', 'Drink Pepsi Cola', { weightDiceCoefficient: 10 })).toBe(
      0.6114350912778905,
    );
    expect(
      fuzzyMatch('Drink Coca Cola', 'Drink Pepsi Cola', { weightLongestCommonSubstring: 10 }),
    ).toBe(0.5027538314176245);
    expect(
      fuzzyMatch('Drink Coca Cola', 'Drink Pepsi Cola', {
        weightLevenshteinDistance: 0,
        weightDiceCoefficient: 0,
        weightLongestCommonSubstring: 0,
      }),
    ).toBe(0);
  });

  test('Handle empty strings', () => {
    expect(fuzzyMatch('Drink Coca Cola', '')).toBe(0);
    expect(fuzzyMatch('', 'Drink Pepsi Cola')).toBe(0);
    expect(fuzzyMatch('', '')).toBe(0);
  });
});