plspace/src/lib/notifications.test.ts

import { describe, expect, it } from 'vitest'
import { account, status } from '$test/fixtures'
import type { Notification } from './api/types'
import { NotificationTracker, presentNotification } from './notifications'

function notification(overrides: Partial<Notification> = {}): Notification {
  return {
    id: 'notification-1',
    type: 'mention',
    created_at: '2026-01-01T00:00:00.000Z',
    account: account({ display_name: 'Bob', acct: 'bob' }),
    status: status({ id: 'mentioned-entry', content: '<p>Hello there</p>' }),
    ...overrides,
  }
}

describe('NotificationTracker', () => {
  it('uses the first page as a quiet baseline and emits only unseen items later', () => {
    const tracker = new NotificationTracker()
    const baseline = notification({ id: 'old' })
    const fresh = notification({ id: 'new' })

    expect(tracker.ingest([baseline])).toEqual([])
    expect(tracker.cursor).toBe('old')
    expect(tracker.ingest([fresh, baseline])).toEqual([fresh])
    expect(tracker.cursor).toBe('new')
    expect(tracker.ingest([fresh, baseline])).toEqual([])
  })
})

describe('presentNotification', () => {
  it('links status notifications to the relevant entry', () => {
    expect(presentNotification(notification())).toEqual({
      actor: 'Bob',
      message: 'mentioned you in an entry',
      excerpt: 'Hello there',
      href: '#/blog/mentioned-entry',
    })
  })

  it('links friend requests to their manager', () => {
    expect(
      presentNotification(notification({ type: 'follow_request', status: null })).href,
    ).toBe('#/mail/requests')
  })
})