Composing unit tests in FQL

isWidget.test.ts

// Copyright Fauna, Inc.
// SPDX-License-Identifier: MIT-0

import { IsWidget } from '../src/widget/lib';

// Test setup, etc.

test('Widgets are identified correctly', async () => {
  const result = await faunaClient.query(
    Let({
        widget: widgetName
      },
      IsWidget(Var("widget"))
    ));

  expect(result).toBeTruthy();
});

isWidget.ts

// Copyright Fauna, Inc.
// SPDX-License-Identifier: MIT-0

export function IsWidget(name: faunadb.Expr): faunadb.Expr {
  return Let(
    {
      collection: Collection(name),
      metadata: Select(["data"], Get(Var("collection")), { widget: false }),
      isWidget: Select(["widget"], Var("metadata"))
    },
    Equals(Var("isWidget"), true)
  )
}