old_contents: // const test = require('tape-catch');
  
  'Registers the element';
  
  'Updates the first SVG inside ASAP';
  
  'Doesn’t touch any other SVG';
  
new_contents: import register from './module/register';
  
  const test = require('tape-catch');
  
  test('Registers the <parametric-svg> element', (is) => {
    is.plan(2);
  
    const registerElement = (
      name, {extends: extendsArg = null}
    ) => {
      is.equal(
        name,
        'parametric-svg',
        'under the name <parametric-svg>'
      );
  
      is.equal(
        extendsArg,
        null,
        'as a standard HTML element – no bells and whistles'
      );
    };
  
    register({document: {registerElement}});
  });
  
  'Updates the first SVG inside ASAP';
  
  'Doesn’t touch any other SVG';
  
subject: Test document registration