test
37100ced3f
Keep the profile payload smaller on first paint and fetch collections through a dedicated API when the collections tab is needed.
71 lines
2.8 KiB
React
71 lines
2.8 KiB
React
import React from 'react'
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import { render, waitFor } from '@testing-library/react'
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import { beforeEach, describe, expect, it, vi } from 'vitest'
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import useLazyProfileCollections from './useLazyProfileCollections'
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function Harness({ username = 'alice', initial = null, enabled = false }) {
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const state = useLazyProfileCollections({
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username,
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initialCollections: initial,
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enabled,
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})
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return <output data-testid="state">{JSON.stringify(state)}</output>
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}
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describe('useLazyProfileCollections', () => {
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beforeEach(() => vi.restoreAllMocks())
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it('does not request while the profile remains on Posts', () => {
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const fetchMock = vi.spyOn(globalThis, 'fetch')
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render(<Harness />)
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expect(fetchMock).not.toHaveBeenCalled()
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})
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it('requests once on first Collections activation and reuses the result', async () => {
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const fetchMock = vi.spyOn(globalThis, 'fetch').mockResolvedValue({
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ok: true,
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json: async () => ({ data: [{ id: 1, title: 'One' }] }),
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})
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const view = render(<Harness />)
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view.rerender(<Harness enabled />)
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await waitFor(() => expect(fetchMock).toHaveBeenCalledTimes(1))
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await waitFor(() => expect(JSON.parse(view.getByTestId('state').textContent).items).toHaveLength(1))
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view.rerender(<Harness enabled={false} />)
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view.rerender(<Harness enabled />)
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expect(fetchMock).toHaveBeenCalledTimes(1)
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})
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it('treats an empty response as loaded and does not refetch', async () => {
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const fetchMock = vi.spyOn(globalThis, 'fetch').mockResolvedValue({ ok: true, json: async () => ({ data: [] }) })
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const view = render(<Harness enabled />)
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await waitFor(() => expect(JSON.parse(view.getByTestId('state').textContent).loaded).toBe(true))
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view.rerender(<Harness enabled={false} />)
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view.rerender(<Harness enabled />)
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expect(fetchMock).toHaveBeenCalledTimes(1)
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})
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it('uses direct Collections SSR data without a lazy request', () => {
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const fetchMock = vi.spyOn(globalThis, 'fetch')
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const initial = [{ id: 9, title: 'SSR collection' }]
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const view = render(<Harness initial={initial} enabled />)
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expect(fetchMock).not.toHaveBeenCalled()
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expect(JSON.parse(view.getByTestId('state').textContent).items).toEqual(initial)
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})
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it('ignores a stale response after profile navigation', async () => {
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let resolveAlice
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const fetchMock = vi.spyOn(globalThis, 'fetch').mockImplementation(() => new Promise((resolve) => { resolveAlice = resolve }))
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const view = render(<Harness username="alice" enabled />)
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await waitFor(() => expect(fetchMock).toHaveBeenCalledTimes(1))
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view.rerender(<Harness username="bob" enabled />)
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resolveAlice({ ok: true, json: async () => ({ data: [{ id: 'alice' }] }) })
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await waitFor(() => expect(JSON.parse(view.getByTestId('state').textContent).items).toEqual([]))
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})
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})
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