Module-Rust/server/test/catalogue.test.js

// ── The boundary, asserted ────────────────────────────────────────────────
//
// `catalogue.js` is the only thing standing between a frame carrying an IP
// address and a public page, so it gets a suite of its own rather than being
// covered incidentally by a route test.
//
// The most valuable test here is the last one: it holds the classification
// against the specification in `docs/rust-link/PROTOCOL.md` §8.4. Without it the
// two drift the first time somebody adds a kind to the protocol, and the drift
// is silent in the direction that matters — a new kind is simply never served,
// until the day somebody "fixes" that by adding it to the wrong list.

const test = require('node:test')
const assert = require('node:assert')

const catalogue = require('../catalogue')

test('an unknown kind is not public — the default is deny', () => {
  assert.equal(catalogue.isPublic('player.death'), true)
  assert.equal(catalogue.isPublic('something.new'), false)
  assert.equal(catalogue.isPublic(''), false)
  assert.equal(catalogue.isPublic(undefined), false)

  // The shape of the mistake this prevents: a kind a LATER protocol adds, which
  // this build ingests happily and would publish on the day it first arrived if
  // the filter were a deny list.
  assert.equal(catalogue.isKnown('player.location'), false)
  assert.equal(catalogue.isPublic('player.location'), false)
})

test('nothing carrying an IP address, a report or an identity is public', () => {
  for (const kind of [
    'player.login.attempt',
    'player.approved',
    'player.banned',
    'player.unbanned',
    'player.reported',
    'entity.destroyed',
    // Protocol 3. A link request on a public killfeed would tell everyone which
    // Steam id is about to become a named website account, and an unlink would
    // say when somebody stopped being one.
    'account.link.requested',
    'account.unlinked',
  ]) {
    assert.equal(catalogue.isPublic(kind), false, `${kind} must not be public`)
    assert.ok(catalogue.STAFF_KINDS.includes(kind), `${kind} must be classified, not merely absent`)
  }
})

test('a viewer with no kinds asked for gets the allowlist, never everything', () => {
  const asPublic = catalogue.kindsFor({})
  const asAdmin = catalogue.kindsFor({ admin: true })

  assert.deepEqual(asPublic, [...catalogue.PUBLIC_KINDS])
  assert.equal(asAdmin.length, catalogue.ALL_KINDS.length)

  // The property that makes the route safe by construction: there is no argument
  // a caller can omit that turns the filter off.
  assert.ok(asPublic.length > 0)
  assert.ok(!asPublic.includes('player.banned'))
})

test('a kind a viewer may not see is dropped, not refused', () => {
  const asked = catalogue.kindsFor({ requested: ['player.death', 'player.banned'] })

  assert.deepEqual(asked, ['player.death'])

  // Asking for only forbidden kinds answers with nothing to select, which the
  // model turns into an empty list — the events are, as far as this viewer is
  // concerned, not there.
  assert.deepEqual(catalogue.kindsFor({ requested: ['player.banned'] }), [])

  // And an admin gets what they asked for.
  assert.deepEqual(catalogue.kindsFor({ admin: true, requested: ['player.banned'] }), [
    'player.banned',
  ])
})

test('every kind is classified exactly once', () => {
  const seen = new Set()

  for (const kind of catalogue.ALL_KINDS) {
    assert.ok(!seen.has(kind), `${kind} appears in both lists`)
    seen.add(kind)
  }

  assert.equal(seen.size, catalogue.PUBLIC_KINDS.length + catalogue.STAFF_KINDS.length)
})

test('the classification covers exactly the kinds protocol 3 defines', () => {
  // The spec lives in another repository, so the list is restated here rather
  // than parsed — and restating it is the point: adding a kind to the protocol
  // without deciding who may see it has to fail somewhere, and this is where.
  //
  // Sourced from docs/rust-link/PROTOCOL.md §8.4.
  const PROTOCOL_3 = [
    'player.connected',
    'player.disconnected',
    'player.respawned',
    'player.death',
    'player.chat',
    'player.tally',
    'entity.destroyed',
    'player.reported',
    'player.banned',
    'player.unbanned',
    'player.login.attempt',
    'player.approved',
    'server.wipe',
    'server.initialized',
    'server.shutdown',
    'account.link.requested',
    'account.unlinked',
  ]

  assert.deepEqual([...catalogue.ALL_KINDS].sort(), [...PROTOCOL_3].sort())
})