react-html-parser/test/integration/integration.spec.js at 042af2afe9dae69d87bf3ab10be111822bcd2188 · peternewnham/react-html-parser · GitHub

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import React from 'react';
import ReactDOMServer from 'react-dom/server';
import HtmlParser, { convertNodeToElement, htmlparser2 } from 'index';

const reactVersion = parseInt(require('react/package.json').version.match(/^(\d+)\./)[1], 10);

class HtmlParserComponent extends React.Component {
  render() {
    return <div>{HtmlParser(this.props.html, this.props.options)}</div>;
  }
}

const test = function(html, override=null, options={}) {
  const actual = ReactDOMServer.renderToStaticMarkup(<HtmlParserComponent html={html} options={options} />);
  const expected = `<div>${override === null && html || override}</div>`;
  expect(actual).toBe(expected);
};

describe('Integration tests: ', () => {

  it('should render a simple element', () => {
    test('<div>test</div>');
  });

  it('should render multiple sibling elements', () => {
    test('<div>test1</div><span>test2</span><footer>test3</footer>');
  });

  it('should render nested elements', () => {
    test('<div><span>test1</span><div><ul><li>test2</li><li>test3</li></ul></div></div>');
  });

  it('should handle bad html', () => {
    test(
      '<div class=test>test<ul><li>test1<li>test2</ul><span>test</span></div>',
      '<div class="test">test<ul><li>test1</li><li>test2</li></ul><span>test</span></div>'
    );
  });

  it('should ignore doctypes', () => {
    test(
      '<!doctype html><div>test</div>',
      '<div>test</div>'
    );
  });

  it('should ignore comments', () => {
    test('<div>test1</div><!-- comment --><div>test2</div>', '<div>test1</div><div>test2</div>');
  });

  it('should ignore script tags', () => {
    test('<script>alert(1)</script>', '');
  });

  it('should ignore event handlers', () => {
    test('<a href="#" onclick="alert(1)">test</a>', '<a href="#">test</a>');
  });

  it('should handle attributes', () => {
    test('<div class="test" id="test" aria-test="test" data-test="test">test</div>');
  });

  it('should handle inline styles', () => {

    // react 16 drops trailing semi commas from inline styles so we have to test for both
    const trailingSemiComma = reactVersion === 15 ? ';' : '';

    test(`<div style="border-radius:1px;background:red${trailingSemiComma}">test</div>`);
  });

  it('should ignore inline styles that are empty strings', () => {
    test('<div style="">test</div>', '<div>test</div>');
  });

  it('should not allow nesting of void elements', () => {
    test('<img><p>test</p></img>', '<img/><p>test</p>');
  });

  it('should convert boolean attribute values', () => {
    test('<input disabled>', '<input disabled=""/>');
    test('<input disabled="">', '<input disabled=""/>');
    test('<input disabled="disabled">', '<input disabled=""/>');
  });

  it('should decode html entities by default', () => {
    test('<span>&excl;</span>', '<span>!</span>');
  });

  it('should not decode html entities when the option is disabled', () => {
    test(
      '<span>&excl;</span>',
      '<span>&amp;excl;</span>',
      {
        decodeEntities: false
      }
    );
  });

  describe('transform function', () => {

    it('should use the response when it is not undefined', () => {
      test(
        '<span>test</span><div>another</div>',
        '<p>transformed</p><p>transformed</p>',
        {
          transform(node, index) {
            return <p key={index}>transformed</p>;
          }
        }
      );
    });

    it('should not render elements and children when returning null', () => {
      test(
        '<p>test<span>inner test<b>bold child</b></span></p>',
        '<p>test</p>',
        {
          transform(node) {
            if (node.type === 'tag' && node.name === 'span') {
              return null;
            }
          }
        }
      );
    });

    it('should allow modifying nodes', () => {
      test(
        '<a href="/test">test link</a>',
        '<a href="/changed">test link</a>',
        {
          transform(node, index) {
            node.attribs.href = '/changed';
            return convertNodeToElement(node, index);
          }
        }
      );
    });

    it('should allow passing the transform function down to children', () => {
      const transform = function(node, index) {
        if (node.type === 'tag') {
          if (node.name === 'ul') {
            node.attribs.class = 'test';
            return convertNodeToElement(node, index, transform);
          }
        }
        if (node.type === 'text') {
          return node.data.replace(/list/, 'changed');
        }
      };
      test(
        '<ul><li>list 1</li><li>list 2</li></ul>',
        '<ul class="test"><li>changed 1</li><li>changed 2</li></ul>',
        {
          transform
        }
      );
    });

  });

  it('should not render invalid tags', () => {
    test(
      '<div>test<test</div>',
      '<div>test</div>'
    );
  });

  it('should not render invalid attributes', () => {
    test(
      '<div test<="test" class="test">content</div>',
      '<div class="test">content</div>'
    );
  });

  it('should preprocess nodes correctly', () => {
    test(
      '<div>preprocess test</div>',
      '<div>preprocess test</div><div>preprocess test</div>',
      {
        preprocessNodes(nodes) {
          return [
            ...nodes,
            ...nodes
          ];
        }
      }
    );
  });

  it('should expose htmlparser2', () => {
    expect(htmlparser2).toBeDefined();
  });

  it('should preserve whitespace with new lines between nodes', () => {
    test(
      '<strong>there should be</strong>\n  <strong>a space</strong>',
      '<strong>there should be</strong>\n  <strong>a space</strong>'
    );
  });
});