go.chromium.org/luci@v0.0.0-20240309015107-7cdc2e660f33/milo/ui/src/common/tools/markdown/plugins/special_line.test.ts (about)

     1  // Copyright 2021 The LUCI Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  import { fixture } from '@open-wc/testing-helpers';
    16  import markdownIt from 'markdown-it';
    17  import Token from 'markdown-it/lib/token';
    18  
    19  import { specialLine } from './special_line';
    20  
    21  function lookaheadLine(md: markdownIt) {
    22    md.use(specialLine, /^(?=abc=)/i, (token: Token) => {
    23      token.content = 'special';
    24      return [token];
    25    });
    26  }
    27  
    28  describe('special_line', () => {
    29    test('can handle regex matching empty prefix (e.g. lookahead regex)', async () => {
    30      const md = markdownIt('zero', { breaks: true, linkify: true }).use(
    31        lookaheadLine,
    32      );
    33  
    34      const ele = await fixture(md.render('abc=content'));
    35      expect(ele.textContent).toStrictEqual('special');
    36    });
    37  });