W3cCredentialService Custom Document Loader does not work when no Internet -> e2e Tests Fail

[NB-MikeRichardson]

If I run the w3cCredentialService tests (in modules/vc/tests/W3cCredentialService.test.ts) with my internet connection turned off most of the tests fail (with the invalid URL error that you get when it cannot resolve an external uri).

See the custom document loader in packages/core/src/modules/vc/tests/documentLoader.ts

The custom loader has a call to jsonld.frame for did: URLs :-

if (url.startsWith('did:')) {
  result = await jsonld.frame(result, {
    '@context': result['@context'],
    '@embed': '@never',
    id: url,
  })
}

Inside the jsonld.frame call (deep inside the digitalcredentials library) it is attempting to resolve the context by attempting to go across the internet (which fails)

It looks like it uses its own default document loader to do this (which I believe relies on having a network connection)