message: this was a test bug
  we're trying to exercise the data source that we created directly in this test, not the default test data source (which just happens to also be ephemeral)
diff: @@ -25,6 +25,17 @@ describe('ephemeral-storage', function() {
  })
  ]);
  + initial.addResource('posts', 'first-post').withAttributes({
  + title: 'The First Post',
  + body: 'First post body'
  + });
  +
  + initial.addResource('posts', 'second-post').withAttributes({
  + title: 'The Second Post',
  + body: 'Second post body'
  + });
  +
  +
  let dataSource = factory.addResource('data-sources').withAttributes({
  sourceType: '@cardstack/ephemeral',
  params: {
  @@ -43,16 +54,6 @@ describe('ephemeral-storage', function() {
  })
  ]);
  - factory.addResource('posts', 'first-post').withAttributes({
  - title: 'The First Post',
  - body: 'First post body'
  - });
  -
  - factory.addResource('posts', 'second-post').withAttributes({
  - title: 'The Second Post',
  - body: 'Second post body'
  - });
  -
  env = await createDefaultEnvironment(__dirname + '/../../../tests/ephemeral-test-app', factory.getModels());
  let app = new Koa();
  