text: import { Generator } from '@jspm/generator';
  import assert from 'assert';
  
  const generator = new Generator({
    mapUrl: new URL('../../', import.meta.url),
    defaultProvider: 'nodemodules',
    providers: {
      'lit-html': 'jspm'
    }
  });
  
  await generator.install('lit-element');
  await generator.install('lit-html');
  
  const json = generator.getMap();
  
  assert.strictEqual(json.imports['lit-element'], './node_modules/lit-element/lit-element.js');
  assert.ok(json.scopes['./']['lit-html/lib/shady-render.js'].startsWith('https://ga.jspm.io'));
  assert.ok(json.scopes['./']['lit-html/lit-html.js'].startsWith('https://ga.jspm.io'));
  