js-search/source/IndexStrategy/PrefixIndexStrategy.test.js

JS Search is an efficient, client-side search library for JavaScript and JSON objects

import { PrefixIndexStrategy } from './PrefixIndexStrategy';

describe('PrefixIndexStrategy', function() {
  var indexStrategy;

  beforeEach(function() {
    indexStrategy = new PrefixIndexStrategy();
  });

  it('should not expand empty tokens', function() {
    var expandedTokens = indexStrategy.expandToken('');

    expect(expandedTokens.length).toEqual(0);
  });

  it('should not expand single character tokens', function() {
    var expandedTokens = indexStrategy.expandToken('a');

    expect(expandedTokens.length).toEqual(1);
    expect(expandedTokens).toContain('a');
  });

  it('should expand multi-character tokens', function() {
    var expandedTokens = indexStrategy.expandToken('cat');

    expect(expandedTokens.length).toEqual(3);
    expect(expandedTokens).toContain('c');
    expect(expandedTokens).toContain('ca');
    expect(expandedTokens).toContain('cat');
  });
});