Function circular2

test/parallel/test-vm-module-link.js:102–141

()

}

async function circular2() {
  const sourceMap = {
    'root': `
      import * as a from './a.mjs';
      import * as b from './b.mjs';
      if (!('fromA' in a))
        throw new Error();
      if (!('fromB' in a))
        throw new Error();
      if (!('fromA' in b))
        throw new Error();
      if (!('fromB' in b))
        throw new Error();
    `,
    './a.mjs': `
      export * from './b.mjs';
      export let fromA;
    `,
    './b.mjs': `
      export * from './a.mjs';
      export let fromB;
    `
  };
  const moduleMap = new Map();
  const rootModule = new SourceTextModule(sourceMap.root, {
    identifier: 'vm:root',
  });
  async function link(specifier, referencingModule) {
    if (moduleMap.has(specifier)) {
      return moduleMap.get(specifier);
    }
    const mod = new SourceTextModule(sourceMap[specifier], {
      identifier: new URL(specifier, 'file:///').href,
    });
    moduleMap.set(specifier, mod);
    return mod;
  }
  await rootModule.link(link);
  await rootModule.evaluate();
}

async function asserts() {
  const m = new SourceTextModule(`