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import {expect} from '@esm-bundle/chai';import type {ScanItem} from './scan';import * as dag from '../dag/mod';import {BTreeWrite} from '../btree/mod';import {decodeIndexKey} from './index.js';import {fromKeyForIndexScanInternal} from '../scan-iterator.js';
test('scan', async () => {  const t = async (fromKey: string, expected: string[]) => {    const dagStore = new dag.TestStore();
    await dagStore.withWrite(async dagWrite => {      const map = new BTreeWrite(dagWrite);      await map.put('foo', 'foo');      await map.put('bar', 'bar');      await map.put('baz', 'baz');      await map.flush();
      const actual = [];      for await (const entry of map.scan(fromKey)) {        actual.push(entry[0]);      }      const expected2 = expected;      expect(actual).to.deep.equal(expected2);    });  };
  await t('', ['bar', 'baz', 'foo']);  await t('ba', ['bar', 'baz', 'foo']);  await t('bar', ['bar', 'baz', 'foo']);  await t('bas', ['baz', 'foo']);  await t('baz', ['baz', 'foo']);  await t('baza', ['foo']);  await t('fop', []);});
async function makeBTreeWrite(  dagWrite: dag.Write,  entries: Iterable<[string, string]>,): Promise<BTreeWrite> {  const map = new BTreeWrite(dagWrite);  for (const [k, v] of entries) {    await map.put(k, v);  }  return map;}
test('scan index startKey', async () => {  const t = async (    entries: Iterable<[string, string]>,    {      startSecondaryKey,      startPrimaryKey,    }: {      startSecondaryKey: string;      startPrimaryKey?: string;    },    expected: ScanItem[],  ) => {    const dagStore = new dag.TestStore();
    await dagStore.withWrite(async dagWrite => {      const map = await makeBTreeWrite(dagWrite, entries);      await map.flush();
      const fromKey = fromKeyForIndexScanInternal({        start: {key: [startSecondaryKey, startPrimaryKey]},        indexName: 'dummy',      });      const actual: ScanItem[] = [];      for await (const entry of map.scan(fromKey)) {        const [secondaryKey, primaryKey] = decodeIndexKey(entry[0]);        actual.push({primaryKey, secondaryKey, val: entry[1]});      }
      expect(actual).to.deep.equal(expected);    });  };
  await t(    [      ['\u{0000}as\u{0000}ap', '1'],      ['\u{0000}bs\u{0000}bp', '2'],      ['\u{0000}cs\u{0000}cp', '3'],    ],    {      startSecondaryKey: 'bs',      startPrimaryKey: undefined,    },    [      {        primaryKey: 'bp',        secondaryKey: 'bs',        val: '2',      },      {        primaryKey: 'cp',        secondaryKey: 'cs',        val: '3',      },    ],  );
  await t(    [      ['\u{0000}as\u{0000}ap', '1'],      ['\u{0000}bs\u{0000}bp', '2'],      ['\u{0000}cs\u{0000}cp', '3'],    ],    {      startSecondaryKey: 'bs',      startPrimaryKey: undefined,    },    [      {        primaryKey: 'bp',        secondaryKey: 'bs',        val: '2',      },      {        primaryKey: 'cp',        secondaryKey: 'cs',        val: '3',      },    ],  );
  await t(    [      ['\u{0000}as\u{0000}ap', '1'],      ['\u{0000}bs\u{0000}bp1', '2'],      ['\u{0000}bs\u{0000}bp2', '3'],      ['\u{0000}cs\u{0000}cp', '4'],    ],    {      startSecondaryKey: 'bs',      startPrimaryKey: 'bp2',    },    [      {        primaryKey: 'bp2',        secondaryKey: 'bs',        val: '3',      },      {        primaryKey: 'cp',        secondaryKey: 'cs',        val: '4',      },    ],  );
  await t(    [      ['\u{0000}as\u{0000}ap', '1'],      ['\u{0000}bs\u{0000}bp1', '2'],      ['\u{0000}bs\u{0000}bp2', '3'],      ['\u{0000}cs\u{0000}cp', '4'],    ],    {      startSecondaryKey: 'bs',      startPrimaryKey: 'bp2',    },    [      {        primaryKey: 'bp2',        secondaryKey: 'bs',        val: '3',      },      {        primaryKey: 'cp',        secondaryKey: 'cs',        val: '4',      },    ],  );});