87 lines
2.6 KiB
TypeScript
87 lines
2.6 KiB
TypeScript
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import { describe, it, expect, vi, beforeEach } from 'vitest'
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import { saveState, loadState, clearSave, SAVE_KEY } from './save'
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import type { GameState, TranscriptLine } from './types'
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import { SCHEMA_VERSION, TRANSCRIPT_CAP } from './types'
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const baseState = (overrides: Partial<GameState> = {}): GameState => ({
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schemaVersion: SCHEMA_VERSION,
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location: 'foyer',
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inventory: [],
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roomState: {},
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flags: {},
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resolveLevel: 'steady',
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encounterState: {},
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lastNoun: null,
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pendingDisambiguation: null,
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transcript: [],
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endedWith: null,
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...overrides,
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})
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describe('save — round trip', () => {
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let store: Record<string, string>
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beforeEach(() => {
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store = {}
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vi.stubGlobal('localStorage', {
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getItem: (k: string) => (k in store ? store[k]! : null),
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setItem: (k: string, v: string) => { store[k] = v },
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removeItem: (k: string) => { delete store[k] },
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})
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})
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it('round-trips an identical state', () => {
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const s = baseState({ location: 'cellar', flags: { gateOpened: true } })
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saveState(s)
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expect(loadState()).toEqual(s)
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})
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it('returns null when nothing is saved', () => {
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expect(loadState()).toBeNull()
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})
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it('returns null and clears the slot on schema mismatch', () => {
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store[SAVE_KEY] = JSON.stringify({ ...baseState(), schemaVersion: SCHEMA_VERSION + 99 })
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expect(loadState()).toBeNull()
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expect(store[SAVE_KEY]).toBeUndefined()
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})
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it('returns null and clears the slot on malformed JSON', () => {
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store[SAVE_KEY] = 'not-json'
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expect(loadState()).toBeNull()
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expect(store[SAVE_KEY]).toBeUndefined()
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})
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it('truncates transcript to TRANSCRIPT_CAP on save', () => {
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const long: TranscriptLine[] = Array.from({ length: TRANSCRIPT_CAP + 50 }, (_, i) => ({
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kind: 'narration',
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text: `line ${i}`,
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}))
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saveState(baseState({ transcript: long }))
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const loaded = loadState()
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expect(loaded?.transcript).toHaveLength(TRANSCRIPT_CAP)
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// Keeps the most recent lines (the tail).
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expect(loaded?.transcript[0]?.text).toBe(`line ${50}`)
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expect(loaded?.transcript[TRANSCRIPT_CAP - 1]?.text).toBe(`line ${TRANSCRIPT_CAP + 49}`)
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})
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})
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describe('save — clear', () => {
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let store: Record<string, string>
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beforeEach(() => {
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store = { [SAVE_KEY]: JSON.stringify(baseState()) }
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vi.stubGlobal('localStorage', {
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getItem: (k: string) => (k in store ? store[k]! : null),
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setItem: (k: string, v: string) => { store[k] = v },
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removeItem: (k: string) => { delete store[k] },
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})
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})
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it('removes the save slot', () => {
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clearSave()
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expect(store[SAVE_KEY]).toBeUndefined()
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expect(loadState()).toBeNull()
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})
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})
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