rsnext/test/unit/page-route-sorter.test.js

/* eslint-env jest */
import { getSortedRoutes } from 'next/dist/next-server/lib/router/utils/sorted-routes'

describe('getSortedRoutes', () => {
  it('does not add extra routes', () => {
    expect(getSortedRoutes(['/posts'])).toEqual(['/posts'])

    expect(getSortedRoutes(['/posts/[id]'])).toEqual(['/posts/[id]'])
    expect(getSortedRoutes(['/posts/[id]/foo'])).toEqual(['/posts/[id]/foo'])

    expect(getSortedRoutes(['/posts/[id]/[foo]/bar'])).toEqual([
      '/posts/[id]/[foo]/bar',
    ])
    expect(getSortedRoutes(['/posts/[id]/baz/[foo]/bar'])).toEqual([
      '/posts/[id]/baz/[foo]/bar',
    ])
  })

  it('correctly sorts required slugs', () => {
    expect(
      getSortedRoutes([
        '/posts',
        '/[root-slug]',
        '/',
        '/posts/[id]',
        '/blog/[id]/comments/[cid]',
        '/blog/abc/[id]',
        '/[...rest]',
        '/blog/abc/post',
        '/blog/abc',
        '/p/[...rest]',
        '/p2/[...rest]',
        '/p2/[id]',
        '/p2/[id]/abc',
        '/blog/[id]',
        '/foo/[d]/bar/baz/[f]',
        '/apples/[ab]/[cd]/ef',
      ])
    ).toMatchInlineSnapshot(`
      Array [
        "/",
        "/apples/[ab]/[cd]/ef",
        "/blog/abc",
        "/blog/abc/post",
        "/blog/abc/[id]",
        "/blog/[id]",
        "/blog/[id]/comments/[cid]",
        "/foo/[d]/bar/baz/[f]",
        "/p/[...rest]",
        "/p2/[id]",
        "/p2/[id]/abc",
        "/p2/[...rest]",
        "/posts",
        "/posts/[id]",
        "/[root-slug]",
        "/[...rest]",
      ]
    `)
  })

  it('catches mismatched param names', () => {
    expect(() =>
      getSortedRoutes([
        '/',
        '/blog',
        '/blog/[id]',
        '/blog/[id]/comments/[cid]',
        '/blog/[cid]',
      ])
    ).toThrowError(/different slug names/)
  })

  it('catches reused param names', () => {
    expect(() =>
      getSortedRoutes(['/', '/blog', '/blog/[id]/comments/[id]', '/blog/[id]'])
    ).toThrowError(/the same slug name/)
  })

  it('catches reused param names', () => {
    expect(() =>
      getSortedRoutes(['/blog/[id]', '/blog/[id]/[...id]'])
    ).toThrowError(/the same slug name/)
  })

  it('catches middle catch-all', () => {
    expect(() => getSortedRoutes(['/blog/[...id]/[...id2]'])).toThrowError(
      /must be the last part/
    )
  })

  it('catches middle catch-all', () => {
    expect(() => getSortedRoutes(['/blog/[...id]/abc'])).toThrowError(
      /must be the last part/
    )
  })

  it('catches extra dots in catch-all', () => {
    expect(() => getSortedRoutes(['/blog/[....id]/abc'])).toThrowError(
      /erroneous period/
    )
  })

  it('catches missing dots in catch-all', () => {
    expect(() => getSortedRoutes(['/blog/[..id]/abc'])).toThrowError(
      /erroneous period/
    )
  })
})