bend_puzzle/test/concurrency-smoke-test.js

'use strict';
const {vm,app,assert,functionSource}=require('./helpers/app-source');

const persistSource=functionSource('persistDirtyToDb');
const startupSource=functionSource('loadSnapshotFromDb');
const startupV2Source=functionSource('loadV2SnapshotFromDb');
const initialSource=functionSource('readInitialDataAsync');
const replaceSource=functionSource('beginWorldReplacement');
const clearSource=functionSource('clearDatabaseWorld');

assert(startupSource.includes('loadV2SnapshotFromDb')&&startupV2Source.includes("db.transaction(['worlds','boardIndex','outboxV2','recoveryV2','tombstonesV2'],'readonly')"),
  'Startup does not read the snapshot, recovery coverage, and tombstones atomically');
assert(startupV2Source.includes("objectStore('recoveryV2').getAll")&&startupV2Source.includes("objectStore('tombstonesV2').getAll"),
  'Startup omits database recovery journals or tombstones');
assert(!initialSource.includes('loadRecoveryCoverage('),
  'Startup still performs the recovery coverage read in a second transaction');
assert(replaceSource.includes('await preserveRecoveryDurably('),
  'World replacement does not await a verified recovery backup');
assert(functionSource('runStatusRetry').includes('statusRetryAction')&&!app.includes('復元用バックアップがありません。'),
  'The shared-server retry button still attempts obsolete local-backup recovery');
assert(clearSource.includes("activateReadyWorldV2({epoch:newEpoch,expected,world},{kind:'reset'})"),
  'Fresh-world reset does not use atomic epoch activation');
assert(!app.includes('worldMutationLockDepth')&&functionSource('withWorldMutationLock').includes("mode:'exclusive'"),
  'World mutation locking still bypasses unrelated asynchronous callers');
assert(functionSource('persistNow').includes('if(options.lockHeld===true)return run()')&&functionSource('expandMetaNow').includes('lockHeld:true'),
  'Nested expansion persistence can deadlock behind a queued lock waiter');
assert(!app.includes('worldInitReady')&&!app.includes('deferredWorldSignals')&&!app.includes('BroadcastChannel'),
  'Retired cross-tab board synchronization remains');
assert(functionSource('fetchCurrentSharedWorldStatus').includes("status.singleWorld===true")&&functionSource('initCloudSync').includes('resetClientToSingleSharedWorld()'),
  'Startup does not require and adopt the single server-authoritative world');

const request=result=>({result});
function memoryStore(initial=[],keyOf=row=>row.id){
  const normalizeKey=key=>Array.isArray(key)?key.join(':'):key,rows=new Map(initial.map(row=>[normalizeKey(keyOf(row)),structuredClone(row)]));
  return{
    rows,
    get:key=>request(rows.has(normalizeKey(key))?structuredClone(rows.get(normalizeKey(key))):null),
    put:row=>{rows.set(normalizeKey(keyOf(row)),structuredClone(row));return request(keyOf(row))},
    delete:key=>{rows.delete(normalizeKey(key));return request(undefined)},
    clear:()=>{rows.clear();return request(undefined)}
  };
}
function persistenceContext({localMeta=null,localState=null,existingMeta=null,existingState=null,deletion=null,identityEpoch='world:test'}={}){
  const existingId=existingMeta?.id||'B0',existingIndex=existingMeta?{epoch:'world:test',id:existingId,metaRev:existingMeta.rev||0,stateRev:existingState?.rev||0}:null;
  const remoteGlobal={worldEpoch:'world:test',globalRev:20,globalRevAuthor:'remote',nextId:9,cursorStyle:'remote'};
  const stores={
    control:memoryStore([{key:'active',activeFormat:2,activeEpoch:identityEpoch}],row=>row.key),
    worlds:memoryStore([{epoch:'world:test',status:'active',createdAt:1,source:{kind:'fresh'},global:remoteGlobal}],row=>row.epoch),
    boardIndex:memoryStore(existingIndex?[existingIndex]:[],row=>`${row.epoch}:${row.id}`),
    boardPuzzles:memoryStore(existingMeta?[{epoch:'world:test',id:existingId,metaRev:existingMeta.rev||0,meta:existingMeta}]:[],row=>`${row.epoch}:${row.id}`),
    boardStates:memoryStore(existingState?[{epoch:'world:test',id:existingId,stateRev:existingState.rev||0,value:existingState}]:[],row=>`${row.epoch}:${row.id}`),
    outboxV2:memoryStore([],row=>`${row.epoch}:${row.key}`),recoveryV2:memoryStore([],row=>`${row.epoch}:${row.key}`),tombstonesV2:memoryStore([],row=>`${row.epoch}:${row.id}`)
  };
  const id=localMeta?.id||existingMeta?.id||'B0';
  const data={
    worldEpoch:'world:test',globalRev:10,globalRevAuthor:'local',nextId:2,cursorStyle:'local',
    metas:localMeta?{[id]:structuredClone(localMeta)}:{},
    states:localState?{[id]:structuredClone(localState)}:{},
    updatedAt:0,clockFloor:0
  };
  const context={
    console,structuredClone,sessionId:'local',lastRevision:100,data,
    dirtyMetaIds:new Set(localMeta?[id]:[]),dirtyStateIds:new Set(localState?[id]:[]),
    deletedBoardIds:new Set(deletion?[id]:[]),
    deletedBoardRevisions:new Map(deletion?[[id,deletion.rev]]:[]),
    deletedBoardAuthors:new Map(deletion?[[id,deletion.revAuthor]]:[]),
    recoveryJournalsToCover:[],recoveryJournalSeq:-1,recoveryWalPromise:Promise.resolve(),
    cloudOutboxDeleteKeys:new Set(),cloudJournalMetaIds:new Set(),cloudJournalStateIds:new Set(),
    cloudJournalDeletedIds:new Set(deletion?[id]:[]),cloudApiEnabled:false,
    globalDirty:true,globalChangeSeq:1,cloudJournalGlobalChanged:true,worldSignalSeq:0,
    idbAvailable:true,activeStorageFormat:2,FIELD_STORAGE_FORMAT:2,storageAccessError:null,normalizedStateObjects:new WeakSet(),
    boardIndexSummaries:new Map(),
    statsDirty:false,resetHistory:[],
    pruneAndCount:()=>{},
    hasPendingPersistence:()=>context.globalDirty||context.dirtyMetaIds.size>0||context.dirtyStateIds.size>0||context.deletedBoardIds.size>0,
    validWorldEpoch:value=>typeof value==='string'&&value.startsWith('world:'),
    storedWorldEpoch:()=>null,createWorldEpoch:()=> 'world:test',rememberWorldEpoch:()=>true,
    revisionVersion:value=>({rev:value?.rev||0,revAuthor:value?.revAuthor||value?.author||''}),
    compareRevisionVersions:(a,b)=>(a?.rev||0)-(b?.rev||0)||String(a?.revAuthor||a?.author||'').localeCompare(String(b?.revAuthor||b?.author||'')),
    newerRevisionValue:(a,b)=>context.compareRevisionVersions(a,b)>=0?a:b,
    trustedNow:()=>1234,
    globalForStorage:(source,updatedAt)=>({...source,metas:undefined,states:undefined,updatedAt,clockFloor:updatedAt}),
    mergeGlobalRecords:(stored,incoming)=>context.compareRevisionVersions(
      {rev:incoming.globalRev,revAuthor:incoming.globalRevAuthor},
      {rev:stored?.globalRev,revAuthor:stored?.globalRevAuthor}
    )>=0?incoming:stored,
    applyGlobalRecordToData:record=>Object.assign(data,structuredClone(record)),
    staleWorldEpochError:()=>Object.assign(new Error('stale world'),{code:'STALE_WORLD_EPOCH'}),
    metaRowsForStorage:ids=>ids.map(rowId=>data.metas[rowId]&&structuredClone(data.metas[rowId])).filter(Boolean),
    stateRowsForStorage:ids=>ids.map(rowId=>data.states[rowId]&&({id:rowId,value:structuredClone(data.states[rowId])})).filter(Boolean),
    snapshotForStorage:()=>({}),writeCompactMirror:()=>true,
    openWorldDb:async()=>({transaction:()=>({objectStore:name=>stores[name],abort(){this.aborted=true}})}),
    transactionDone:async()=>{},requestValue:async req=>req.result,
    updateStorageRevision:()=>{},scheduleMirrorCheckpoint:()=>{},
    normalizeMeta:(_id,value)=>structuredClone(value),normalizeState:value=>structuredClone(value||{paths:[],rev:0,revAuthor:''}),
    metaFromV2Records:(_index,puzzle)=>puzzle?.meta?structuredClone(puzzle.meta):null,
    stateFromV2Record:(_index,state)=>state?.value?structuredClone(state.value):null,
    puzzleRecordV2:(meta,epoch)=>({epoch,id:meta.id,metaRev:meta.rev||0,meta:structuredClone(meta)}),
    stateRecordV2:(rowId,state,epoch)=>({epoch,id:rowId,stateRev:state?.rev||0,value:structuredClone(state)}),
    summarizeBoardV2:(meta,state,epoch)=>({epoch,id:meta.id,metaRev:meta.rev||0,stateRev:state?.rev||0}),
    fieldBoundsFromMetas:()=>({minX:0,minY:0,maxX:1,maxY:1}),SAVE_SCHEMA:31,WORLD_GENERATION:'current-only-test',
    clearRecoveryJournalIfCovered:()=>{},broadcastWorldSignal:()=>{},scheduleCloudPush:()=>{},
    refreshWorldView:()=>{context.refreshes++},refreshes:0,
    interactionActive:()=>false,waitForInteractionSettle:async()=>{},
    perfStart:()=>0,perfEnd:()=>{},perfGauge:()=>{}
  };
  vm.createContext(context);
  vm.runInContext(`${persistSource}\nthis.persistDirtyToDb=persistDirtyToDb;`,context);
  return{context,stores,id};
}

async function verifyPersistenceConflicts(){
  {
    const localMeta={id:'B0',x:1,rev:5,revAuthor:'local'},localState={paths:[],rev:5,revAuthor:'local'};
    const existingMeta={id:'B0',x:7,rev:10,revAuthor:'remote'},existingState={paths:[[1]],rev:11,revAuthor:'remote'};
    const {context,stores}=persistenceContext({localMeta,localState,existingMeta,existingState});
    await context.persistDirtyToDb();
    assert(stores.boardPuzzles.rows.get('world:test:B0').meta.x===7&&stores.boardStates.rows.get('world:test:B0').value.rev===11,
      'A stale tab overwrote a newer database row');
    assert(context.data.metas.B0.x===7&&context.data.states.B0.rev===11&&context.refreshes===1,
      'A stale in-memory board was not reconciled to the committed winner');
    assert(context.data.cursorStyle==='remote'&&context.data.nextId===9,
      'A stale global record overwrote the newer global winner');
  }
  {
    const existingMeta={id:'B0',x:4,rev:20,revAuthor:'remote'},existingState={paths:[],rev:21,revAuthor:'remote'};
    const {context,stores}=persistenceContext({
      existingMeta,existingState,deletion:{rev:15,revAuthor:'local'}
    });
    await context.persistDirtyToDb();
    assert(stores.boardPuzzles.rows.has('world:test:B0')&&stores.boardStates.rows.has('world:test:B0')&&!stores.tombstonesV2.rows.has('world:test:B0'),
      'A stale deletion removed a newer database board');
    assert(context.data.metas.B0?.rev===20&&context.data.states.B0?.rev===21&&context.refreshes===1,
      'A rejected stale deletion was not restored in the losing tab');
  }
  {
    const existingMeta={id:'B0',rev:20,revAuthor:'remote'},existingState={paths:[],rev:20,revAuthor:'remote'};
    const {context,stores}=persistenceContext({
      existingMeta,existingState,deletion:{rev:25,revAuthor:'local'}
    });
    await context.persistDirtyToDb();
    assert(!stores.boardPuzzles.rows.has('world:test:B0')&&!stores.boardStates.rows.has('world:test:B0'),
      'A newer deletion did not remove the older board rows');
    assert(stores.tombstonesV2.rows.get('world:test:B0')?.rev===25,
      'A committed deletion did not leave a durable tombstone');
  }
  {
    const localMeta={id:'B0',rev:5,revAuthor:'local'};
    const {context}=persistenceContext({localMeta,identityEpoch:'world:replacement'});
    let error=null;try{await context.persistDirtyToDb()}catch(caught){error=caught}
    assert(error?.code==='STALE_WORLD_EPOCH'&&context.dirtyMetaIds.has('B0'),
      'A stale tab was allowed to write into a replaced world epoch');
  }
}

function verifyGlobalMerge(){
  const {normalizeSpecialMechanics}=require('../shared-contracts');
  const context={
    deepClone:value=>structuredClone(value),structuredClone,
    normalizeSpecialMechanics,
    validWorldEpoch:value=>typeof value==='string'&&value.startsWith('world:'),
    compareRevisionVersions:(a,b)=>(a?.rev||0)-(b?.rev||0)||String(a?.revAuthor||'').localeCompare(String(b?.revAuthor||'')),
    bonusEventTotal:events=>Object.values(events||{}).reduce((sum,value)=>sum+(value||0),0)
  };
  vm.createContext(context);
  vm.runInContext(`${functionSource('mergeGlobalRecords')}\nthis.mergeGlobalRecords=mergeGlobalRecords;`,context);
  const merged=context.mergeGlobalRecords(
    {worldEpoch:'world:test',globalRev:30,globalRevAuthor:'remote',cursorStyle:'remote',nextId:8,clockFloor:11,cloudRevision:3,bonusEvents:{A:4},quarantine:{B:{failedAt:5}},lastSolveAt:10,specialMechanicsSeen:['warp'],combo:2},
    {worldEpoch:'world:test',globalRev:20,globalRevAuthor:'local',cursorStyle:'local',nextId:12,clockFloor:15,cloudRevision:9,bonusEvents:{A:2,C:7},quarantine:{B:{failedAt:8}},lastSolveAt:14,specialMechanicsSeen:['lock'],combo:4}
  );
  assert(merged.cursorStyle==='remote'&&merged.nextId===12&&merged.clockFloor===15&&merged.cloudRevision===9,
    'Global LWW and monotonic fields were not merged independently');
  assert(merged.bonusEvents.A===4&&merged.bonusEvents.C===7&&merged.bonusScore===11,
    'Global additive bonus records were lost during a concurrent merge');
  assert(merged.quarantine.B.failedAt===8&&merged.lastSolveAt===14&&!Object.prototype.hasOwnProperty.call(merged,'combo')&&merged.specialMechanicsSeen.join(',')==='lock,warp',
    'Global timestamped records, encounter memory, or retired combo data were merged incorrectly');
}

async function verifyDurableBackup(){
  const source=functionSource('preserveRecoveryDurably');
  const failing={
    Date,safeLocalSet:()=>false,sessionStorage:{setItem(){throw new Error('blocked')}},
    persistRecoveryEnvelope:async()=>false,volatileRecovery:null,recoveryStorageKey:'recovery'
  };
  vm.createContext(failing);vm.runInContext(`${source}\nthis.preserveRecoveryDurably=preserveRecoveryDurably;`,failing);
  let rejected=false;try{await failing.preserveRecoveryDurably('save','reset')}catch(_){rejected=true}
  assert(rejected,'Destructive replacement proceeded without any durable backup');
  const database={
    Date,safeLocalSet:()=>false,sessionStorage:{setItem(){throw new Error('blocked')}},
    persistRecoveryEnvelope:async()=>true,volatileRecovery:null,recoveryStorageKey:'recovery'
  };
  vm.createContext(database);vm.runInContext(`${source}\nthis.preserveRecoveryDurably=preserveRecoveryDurably;`,database);
  const result=await database.preserveRecoveryDurably('save','reset');
  assert(!result.browserCopy&&result.databaseCopy,'A verified database-only backup was not accepted');
}

function verifyRevisionSeed(){
  const context={
    lastRevision:3,data:{},recoveredDeletionTombstones:new Map([['B9',{rev:81}]])
  };
  vm.createContext(context);
  vm.runInContext(`${functionSource('seedRevisionClock')}\nthis.seedRevisionClock=seedRevisionClock;`,context);
  const maximum=context.seedRevisionClock({
    globalRev:50,clockFloor:0,metas:{B0:{rev:60}},states:{B0:{rev:70}}
  });
  assert(maximum===81&&context.lastRevision===81,'The revision clock was not seeded from all persisted row types');
}

(async()=>{
  await verifyPersistenceConflicts();
  verifyGlobalMerge();
  await verifyDurableBackup();
  verifyRevisionSeed();
  console.log('Concurrency and replacement safety test passed');
})().catch(error=>{console.error(error);process.exitCode=1});