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import {expect} from '@esm-bundle/chai';import * as dag from '../dag/mod';import {makeNewTempHashFunction, newTempHash} from '../hash';import {  addGenesis,  addIndexChange,  addLocal,  addSnapshot,  Chain,} from '../db/test-helpers';import {GatherVisitor} from './gather-visitor';import {TestMemStore} from '../kv/test-mem-store';import {sortByHash} from '../dag/test-store';
test('dag with no temp hashes gathers nothing', async () => {  const dagStore = new dag.TestStore();
  const chain: Chain = [];  await addGenesis(chain, dagStore);  await addLocal(chain, dagStore);  await addIndexChange(chain, dagStore);  await addLocal(chain, dagStore);
  await dagStore.withRead(async dagRead => {    for (const commit of chain) {      const visitor = new GatherVisitor(dagRead);      await visitor.visitCommit(commit.chunk.hash);      expect(visitor.gatheredChunks).to.be.empty;    }  });
  await addSnapshot(chain, dagStore, undefined);
  await dagStore.withRead(async dagRead => {    const visitor = new GatherVisitor(dagRead);    await visitor.visitCommit(chain[chain.length - 1].chunk.hash);    expect(visitor.gatheredChunks).to.be.empty;  });});
test('dag with only temp hashes gathers eveything', async () => {  const kvStore = new TestMemStore();  const dagStore = new dag.TestStore(kvStore, newTempHash, () => void 0);  const chain: Chain = [];
  const testGatheredChunks = async () => {    await dagStore.withRead(async dagRead => {      const visitor = new GatherVisitor(dagRead);      await visitor.visitCommit(chain[chain.length - 1].chunk.hash);      expect(dagStore.chunks()).to.deep.equal(        sortByHash(visitor.gatheredChunks.values()),      );    });  };
  await addGenesis(chain, dagStore);  await addLocal(chain, dagStore);  await testGatheredChunks();
  await addIndexChange(chain, dagStore);  await addLocal(chain, dagStore);  await testGatheredChunks();
  await addSnapshot(chain, dagStore, undefined);  await testGatheredChunks();});
test('dag with some permanent hashes and some temp hashes on top', async () => {  const kvStore = new TestMemStore();  const perdag = new dag.TestStore(kvStore);  const chain: Chain = [];
  await addGenesis(chain, perdag);  await addLocal(chain, perdag);
  await perdag.withRead(async dagRead => {    const visitor = new GatherVisitor(dagRead);    await visitor.visitCommit(chain[chain.length - 1].chunk.hash);    expect(visitor.gatheredChunks).to.be.empty;  });
  const memdag = new dag.TestStore(    kvStore,    makeNewTempHashFunction(),    () => void 0,  );
  await addLocal(chain, memdag);
  await memdag.withRead(async dagRead => {    const visitor = new GatherVisitor(dagRead);    await visitor.visitCommit(chain[chain.length - 1].chunk.hash);    expect(Object.fromEntries(visitor.gatheredChunks)).to.deep.equal({      't/000000000000000000000000000000': {        data: [0, [['local', '2']]],        hash: 't/000000000000000000000000000000',        meta: [],      },      't/000000000000000000000000000001': {        data: {          indexes: [],          meta: {            basisHash: 'fakehash000000000000000000000003',            mutationID: 2,            mutatorArgsJSON: [2],            mutatorName: 'mutator_name_2',            originalHash: null,            timestamp: 42,            type: 2,          },          valueHash: 't/000000000000000000000000000000',        },        hash: 't/000000000000000000000000000001',        meta: [          't/000000000000000000000000000000',          'fakehash000000000000000000000003',        ],      },    });  });
  await addSnapshot(    chain,    perdag,    Object.entries({      a: 1,      b: 2,      c: 3,      d: 4,    }),  );  await addIndexChange(chain, memdag);
  await memdag.withRead(async dagRead => {    const visitor = new GatherVisitor(dagRead);    await visitor.visitCommit(chain[chain.length - 1].chunk.hash);    expect(Object.fromEntries(visitor.gatheredChunks)).to.deep.equal({      't/000000000000000000000000000002': {        data: [0, [['\u00002\u0000local', '2']]],        hash: 't/000000000000000000000000000002',        meta: [],      },      't/000000000000000000000000000003': {        data: {          indexes: [            {              definition: {                jsonPointer: '',                keyPrefix: 'local',                name: '4',              },              valueHash: 't/000000000000000000000000000002',            },          ],          meta: {            basisHash: 'fakehash000000000000000000000005',            lastMutationID: 3,            type: 1,          },          valueHash: 'fakehash000000000000000000000004',        },        hash: 't/000000000000000000000000000003',        meta: [          'fakehash000000000000000000000004',          'fakehash000000000000000000000005',          't/000000000000000000000000000002',        ],      },    });  });});