// Original, fictional lesson asset. Inputs are arrays of lesson-like objects.
// The contract counts only the Boolean true, not the string "true".
export function countCompleted(lessons) {
  return lessons.reduce(
    (count, lesson) => count + (lesson.completed === true ? 1 : 0),
    0,
  );
}

export const sampleLessons = [
  { id: 'sample-a', completed: true },
  { id: 'sample-b', completed: false },
  { id: 'sample-c', completed: true },
];