node-nlp/test/nlp/tokenizers/treebank-word-tokenizer.test.js

Library for NLU (Natural Language Understanding) done in Node.js

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const TreebankWordTokenizer = require('../../../lib/nlp/tokenizers/treebank-word-tokenizer');

describe('Treebank Word Tokenizer', () => {
  describe('Constructor', () => {
    test('It should create a new instance', () => {
      const tokenizer = new TreebankWordTokenizer();
      expect(tokenizer).toBeDefined();
    });
    test('I can provide settings', () => {
      const settings = { name: 'a' };
      const tokenizer = new TreebankWordTokenizer(settings);
      expect(tokenizer.settings).toEqual(settings);
    });
    test('If settings are not provided must be an empty object', () => {
      const tokenizer = new TreebankWordTokenizer();
      expect(tokenizer.settings).toEqual({});
    });
  });
  describe('Tokenize', () => {
    test('It must tokenize simple sentence', () => {
      const tokenizer = new TreebankWordTokenizer();
      const expected = ['If', 'we', '\'all', '\'', 'ca', 'n\'t', 'go.', 'I', '\'ll', 'stay', 'home', '.'];
      const actual = tokenizer.tokenize('If we \'all\' can\'t go. I\'ll stay home.');
      expect(actual).toEqual(expected);
    });
    test('It must tokenize complex sentence', () => {
      const tokenizer = new TreebankWordTokenizer();
      const expected = ['If', 'we', '\'all', '\'', 'ca', 'n\'t', 'go.', 'I', '\'ll', 'stay', 'home.', 'If', 'we', '\'all', '\'', 'ca', 'n\'t', 'go.', 'I', '\'ll', 'stay', 'home', '.'];
      const actual = tokenizer.tokenize('If we \'all\' can\'t go. I\'ll stay home. If we \'all\' can\'t go. I\'ll stay home.');
      expect(actual).toEqual(expected);
    });
  });
});