orbitdb/test/oplog/load.test.js
2023-09-18 14:12:43 +01:00

859 lines
32 KiB
JavaScript

// import { strictEqual, deepStrictEqual, notStrictEqual, throws } from 'assert'
// import rimraf from 'rimraf'
// import { copy } from 'fs-extra'
// import { Log, Entry, Sorting } from '../../src/oplog/index.js'
// import { Identities, KeyStore } from '../../src/index.js'
// import bigLogString from '../fixtures/big-log.fixture.js'
// import LogCreator from './utils/log-creator.js'
// import testKeysPath from '../fixtures/test-keys-path.js'
// import { config, testAPIs, startIpfs, stopIpfs } from 'orbit-db-test-utils'
// const { sync: rimraf } = rimraf
// const { LastWriteWins } = Sorting
// const { createIdentity } = Identities
// const { fromJSON, fromEntryHash, fromEntry, fromMultihash: _fromMultihash } = Log
// const { fromMultihash, create, compare } = Entry
// const { createLogWithSixteenEntries, createLogWithTwoHundredEntries } = LogCreator
// // Alternate tiebreaker. Always does the opposite of LastWriteWins
// const FirstWriteWins = (a, b) => LastWriteWins(a, b) * -1
// const BadComparatorReturnsZero = (a, b) => 0
// let ipfsd, ipfs, testIdentity, testIdentity2, testIdentity3, testIdentity4
// const last = (arr) => {
// return arr[arr.length - 1]
// }
// Object.keys(testAPIs).forEach((IPFS) => {
// describe.skip('Log - Load (' + IPFS + ')', function () {
// this.timeout(config.timeout)
// const { identityKeyFixtures, signingKeyFixtures, identityKeysPath } = config
// const firstWriteExpectedData = [
// 'entryA6', 'entryA7', 'entryA8', 'entryA9',
// 'entryA10', 'entryB1', 'entryB2', 'entryB3',
// 'entryB4', 'entryB5', 'entryA1', 'entryA2',
// 'entryA3', 'entryA4', 'entryA5', 'entryC0'
// ]
// let keystore
// before(async () => {
// rimraf(identityKeysPath)
// await copy(identityKeyFixtures, identityKeysPath)
// await copy(signingKeyFixtures, identityKeysPath)
// keystore = await KeyStore({ path: testKeysPath })
// testIdentity = await createIdentity({ id: 'userC', keystore })
// testIdentity2 = await createIdentity({ id: 'userB', keystore })
// testIdentity3 = await createIdentity({ id: 'userD', keystore })
// testIdentity4 = await createIdentity({ id: 'userA', keystore })
// ipfsd = await startIpfs(IPFS, config.defaultIpfsConfig)
// ipfs = ipfsd.api
// })
// after(async () => {
// await stopIpfs(ipfsd)
// await keystore.close()
// rimraf(identityKeysPath)
// })
// describe('fromJSON', async () => {
// let identities
// before(async () => {
// identities = [testIdentity, testIdentity2, testIdentity3, testIdentity4]
// })
// it('creates a log from an entry', async () => {
// const fixture = await createLogWithSixteenEntries(Log, ipfs, identities)
// const data = fixture.log
// const json = fixture.json
// json.heads = await Promise.all(json.heads.map(headHash => fromMultihash(ipfs, headHash)))
// const log = await fromJSON(ipfs, testIdentity, json, { logId: 'X' })
// strictEqual(log.id, data.heads[0].id)
// strictEqual(log.length, 16)
// deepStrictEqual(log.values.map(e => e.payload), fixture.expectedData)
// })
// it('creates a log from an entry with custom tiebreaker', async () => {
// const fixture = await createLogWithSixteenEntries(Log, ipfs, identities)
// const data = fixture.log
// const json = fixture.json
// json.heads = await Promise.all(json.heads.map(headHash => fromMultihash(ipfs, headHash)))
// const log = await fromJSON(ipfs, testIdentity, json,
// { length: -1, logId: 'X', sortFn: FirstWriteWins })
// strictEqual(log.id, data.heads[0].id)
// strictEqual(log.length, 16)
// deepStrictEqual(log.values.map(e => e.payload), firstWriteExpectedData)
// })
// it('respects timeout parameter', async () => {
// const fixture = await createLogWithSixteenEntries(Log, ipfs, identities)
// const json = fixture.json
// json.heads = [{ hash: 'zdpuAwNuRc2Kc1aNDdcdSWuxfNpHRJQw8L8APBNHCEFXbogus' }]
// const timeout = 500
// const st = new Date().getTime()
// const log = await fromJSON(ipfs, testIdentity, json, { logId: 'X', timeout })
// const et = new Date().getTime()
// // Allow for a few millseconds of skew
// strictEqual((et - st) >= (timeout - 10), true, '' + (et - st) + ' should be greater than timeout ' + timeout)
// strictEqual(log.length, 0)
// deepStrictEqual(log.values.map(e => e.payload), [])
// })
// })
// describe('fromEntryHash', () => {
// let identities
// before(async () => {
// identities = [testIdentity, testIdentity2, testIdentity3, testIdentity4]
// })
// it('creates a log from an entry hash', async () => {
// const fixture = await createLogWithSixteenEntries(Log, ipfs, identities)
// const data = fixture.log
// const json = fixture.json
// const log1 = await fromEntryHash(ipfs, testIdentity, json.heads[0],
// { logId: 'X' })
// const log2 = await fromEntryHash(ipfs, testIdentity, json.heads[1],
// { logId: 'X' })
// await log1.join(log2)
// strictEqual(log1.id, data.heads[0].id)
// strictEqual(log1.length, 16)
// deepStrictEqual(log1.values.map(e => e.payload), fixture.expectedData)
// })
// it('creates a log from an entry hash with custom tiebreaker', async () => {
// const fixture = await createLogWithSixteenEntries(Log, ipfs, identities)
// const data = fixture.log
// const json = fixture.json
// const log1 = await fromEntryHash(ipfs, testIdentity, json.heads[0],
// { logId: 'X', sortFn: FirstWriteWins })
// const log2 = await fromEntryHash(ipfs, testIdentity, json.heads[1],
// { logId: 'X', sortFn: FirstWriteWins })
// await log1.join(log2)
// strictEqual(log1.id, data.heads[0].id)
// strictEqual(log1.length, 16)
// deepStrictEqual(log1.values.map(e => e.payload), firstWriteExpectedData)
// })
// it('respects timeout parameter', async () => {
// const timeout = 500
// const st = new Date().getTime()
// const log = await fromEntryHash(ipfs, testIdentity, 'zdpuAwNuRc2Kc1aNDdcdSWuxfNpHRJQw8L8APBNHCEFXbogus', { logId: 'X', timeout })
// const et = new Date().getTime()
// strictEqual((et - st) >= timeout, true, '' + (et - st) + ' should be greater than timeout ' + timeout)
// strictEqual(log.length, 0)
// deepStrictEqual(log.values.map(e => e.payload), [])
// })
// })
// describe('fromEntry', () => {
// let identities
// before(async () => {
// identities = [testIdentity3, testIdentity2, testIdentity, testIdentity4]
// })
// it('creates a log from an entry', async () => {
// const fixture = await createLogWithSixteenEntries(Log, ipfs, identities)
// const data = fixture.log
// const log = await fromEntry(ipfs, testIdentity, data.heads, { length: -1 })
// strictEqual(log.id, data.heads[0].id)
// strictEqual(log.length, 16)
// deepStrictEqual(log.values.map(e => e.payload), fixture.expectedData)
// })
// it('creates a log from an entry with custom tiebreaker', async () => {
// const fixture = await createLogWithSixteenEntries(Log, ipfs, identities)
// const data = fixture.log
// const log = await fromEntry(ipfs, testIdentity, data.heads,
// { length: -1, sortFn: FirstWriteWins })
// strictEqual(log.id, data.heads[0].id)
// strictEqual(log.length, 16)
// deepStrictEqual(log.values.map(e => e.payload), firstWriteExpectedData)
// })
// it('keeps the original heads', async () => {
// const fixture = await createLogWithSixteenEntries(Log, ipfs, identities)
// const data = fixture.log
// const log1 = await fromEntry(ipfs, testIdentity, data.heads,
// { length: data.heads.length })
// strictEqual(log1.id, data.heads[0].id)
// strictEqual(log1.length, data.heads.length)
// strictEqual(log1.values[0].payload, 'entryC0')
// strictEqual(log1.values[1].payload, 'entryA10')
// const log2 = await fromEntry(ipfs, testIdentity, data.heads, { length: 4 })
// strictEqual(log2.id, data.heads[0].id)
// strictEqual(log2.length, 4)
// strictEqual(log2.values[0].payload, 'entryC0')
// strictEqual(log2.values[1].payload, 'entryA8')
// strictEqual(log2.values[2].payload, 'entryA9')
// strictEqual(log2.values[3].payload, 'entryA10')
// const log3 = await fromEntry(ipfs, testIdentity, data.heads, { length: 7 })
// strictEqual(log3.id, data.heads[0].id)
// strictEqual(log3.length, 7)
// strictEqual(log3.values[0].payload, 'entryB5')
// strictEqual(log3.values[1].payload, 'entryA6')
// strictEqual(log3.values[2].payload, 'entryC0')
// strictEqual(log3.values[3].payload, 'entryA7')
// strictEqual(log3.values[4].payload, 'entryA8')
// strictEqual(log3.values[5].payload, 'entryA9')
// strictEqual(log3.values[6].payload, 'entryA10')
// })
// it('onProgress callback is fired for each entry', async () => {
// const items1 = []
// const amount = 100
// for (let i = 1; i <= amount; i++) {
// const prev1 = last(items1)
// const n1 = await create(ipfs, testIdentity, 'A', 'entryA' + i, [prev1])
// items1.push(n1)
// }
// let i = 0
// const callback = (entry) => {
// notStrictEqual(entry, null)
// strictEqual(entry.hash, items1[items1.length - i - 1].hash)
// strictEqual(entry.payload, items1[items1.length - i - 1].payload)
// i++
// }
// await fromEntry(ipfs, testIdentity, last(items1),
// { length: -1, exclude: [], onProgressCallback: callback })
// })
// it('retrieves partial log from an entry hash', async () => {
// const log1 = await Log(testIdentity, { logId: 'X' })
// const log2 = await Log(testIdentity2, { logId: 'X' })
// const log3 = await Log(testIdentity3, { logId: 'X' })
// const items1 = []
// const items2 = []
// const items3 = []
// const amount = 100
// for (let i = 1; i <= amount; i++) {
// const prev1 = last(items1)
// const prev2 = last(items2)
// const prev3 = last(items3)
// const n1 = await create(ipfs, log1._identity, 'X', 'entryA' + i, [prev1])
// const n2 = await create(ipfs, log2._identity, 'X', 'entryB' + i, [prev2, n1])
// const n3 = await create(ipfs, log3._identity, 'X', 'entryC' + i, [prev3, n1, n2])
// items1.push(n1)
// items2.push(n2)
// items3.push(n3)
// }
// // limit to 10 entries
// const a = await fromEntry(ipfs, testIdentity, last(items1), { length: 10 })
// strictEqual(a.length, 10)
// // limit to 42 entries
// const b = await fromEntry(ipfs, testIdentity, last(items1), { length: 42 })
// strictEqual(b.length, 42)
// })
// it('throws an error if trying to create a log from a hash of an entry', async () => {
// const items1 = []
// const amount = 5
// for (let i = 1; i <= amount; i++) {
// const prev1 = last(items1)
// const n1 = await create(ipfs, testIdentity, 'A', 'entryA' + i, [prev1])
// items1.push(n1)
// }
// let err
// try {
// await fromEntry(ipfs, testIdentity, last(items1).hash, { length: 1 })
// } catch (e) {
// err = e
// }
// strictEqual(err.message, '\'sourceEntries\' argument must be an array of Entry instances or a single Entry')
// })
// it('retrieves full log from an entry hash', async () => {
// const log1 = await Log(testIdentity, { logId: 'X' })
// const log2 = await Log(testIdentity2, { logId: 'X' })
// const log3 = await Log(testIdentity3, { logId: 'X' })
// const items1 = []
// const items2 = []
// const items3 = []
// const amount = 10
// for (let i = 1; i <= amount; i++) {
// const prev1 = last(items1)
// const prev2 = last(items2)
// const prev3 = last(items3)
// const n1 = await create(ipfs, log1._identity, 'X', 'entryA' + i, [prev1])
// const n2 = await create(ipfs, log2._identity, 'X', 'entryB' + i, [prev2, n1])
// const n3 = await create(ipfs, log3._identity, 'X', 'entryC' + i, [prev3, n2])
// items1.push(n1)
// items2.push(n2)
// items3.push(n3)
// }
// const a = await fromEntry(ipfs, testIdentity, [last(items1)],
// { length: amount })
// strictEqual(a.length, amount)
// const b = await fromEntry(ipfs, testIdentity2, [last(items2)],
// { length: amount * 2 })
// strictEqual(b.length, amount * 2)
// const c = await fromEntry(ipfs, testIdentity3, [last(items3)],
// { length: amount * 3 })
// strictEqual(c.length, amount * 3)
// })
// it('retrieves full log from an entry hash 2', async () => {
// const log1 = await Log(testIdentity, { logId: 'X' })
// const log2 = await Log(testIdentity2, { logId: 'X' })
// const log3 = await Log(testIdentity3, { logId: 'X' })
// const items1 = []
// const items2 = []
// const items3 = []
// const amount = 10
// for (let i = 1; i <= amount; i++) {
// const prev1 = last(items1)
// const prev2 = last(items2)
// const prev3 = last(items3)
// const n1 = await create(ipfs, log1._identity, 'X', 'entryA' + i, [prev1])
// const n2 = await create(ipfs, log2._identity, 'X', 'entryB' + i, [prev2, n1])
// const n3 = await create(ipfs, log3._identity, 'X', 'entryC' + i, [prev3, n1, n2])
// items1.push(n1)
// items2.push(n2)
// items3.push(n3)
// }
// const a = await fromEntry(ipfs, testIdentity, last(items1),
// { length: amount })
// strictEqual(a.length, amount)
// const b = await fromEntry(ipfs, testIdentity2, last(items2),
// { length: amount * 2 })
// strictEqual(b.length, amount * 2)
// const c = await fromEntry(ipfs, testIdentity3, last(items3),
// { length: amount * 3 })
// strictEqual(c.length, amount * 3)
// })
// it('retrieves full log from an entry hash 3', async () => {
// const log1 = await Log(testIdentity, { logId: 'X' })
// const log2 = await Log(testIdentity2, { logId: 'X' })
// const log3 = await Log(testIdentity4, { logId: 'X' })
// const items1 = []
// const items2 = []
// const items3 = []
// const amount = 10
// for (let i = 1; i <= amount; i++) {
// const prev1 = last(items1)
// const prev2 = last(items2)
// const prev3 = last(items3)
// log1.clock().tick()
// log2.clock().tick()
// log3.clock().tick()
// const n1 = await create(ipfs, log1._identity, 'X', 'entryA' + i, [prev1], log1.clock())
// const n2 = await create(ipfs, log2._identity, 'X', 'entryB' + i, [prev2, n1], log2.clock())
// const n3 = await create(ipfs, log3._identity, 'X', 'entryC' + i, [prev3, n1, n2], log3.clock())
// log1.clock().merge(log2.clock())
// log1.clock().merge(log3.clock())
// log2.clock().merge(log1.clock())
// log2.clock().merge(log3.clock())
// log3.clock().merge(log1.clock())
// log3.clock().merge(log2.clock())
// items1.push(n1)
// items2.push(n2)
// items3.push(n3)
// }
// const a = await fromEntry(ipfs, testIdentity, last(items1),
// { length: amount })
// strictEqual(a.length, amount)
// const itemsInB = [
// 'entryA1',
// 'entryB1',
// 'entryA2',
// 'entryB2',
// 'entryA3',
// 'entryB3',
// 'entryA4',
// 'entryB4',
// 'entryA5',
// 'entryB5',
// 'entryA6',
// 'entryB6',
// 'entryA7',
// 'entryB7',
// 'entryA8',
// 'entryB8',
// 'entryA9',
// 'entryB9',
// 'entryA10',
// 'entryB10'
// ]
// const b = await fromEntry(ipfs, testIdentity2, last(items2),
// { length: amount * 2 })
// strictEqual(b.length, amount * 2)
// deepStrictEqual(b.values.map((e) => e.payload), itemsInB)
// const c = await fromEntry(ipfs, testIdentity4, last(items3),
// { length: amount * 3 })
// await c.append('EOF')
// strictEqual(c.length, amount * 3 + 1)
// const tmp = [
// 'entryA1',
// 'entryB1',
// 'entryC1',
// 'entryA2',
// 'entryB2',
// 'entryC2',
// 'entryA3',
// 'entryB3',
// 'entryC3',
// 'entryA4',
// 'entryB4',
// 'entryC4',
// 'entryA5',
// 'entryB5',
// 'entryC5',
// 'entryA6',
// 'entryB6',
// 'entryC6',
// 'entryA7',
// 'entryB7',
// 'entryC7',
// 'entryA8',
// 'entryB8',
// 'entryC8',
// 'entryA9',
// 'entryB9',
// 'entryC9',
// 'entryA10',
// 'entryB10',
// 'entryC10',
// 'EOF'
// ]
// deepStrictEqual(c.values.map(e => e.payload), tmp)
// // make sure logX comes after A, B and C
// const logX = await Log(testIdentity4, { logId: 'X' })
// await logX.append('1')
// await logX.append('2')
// await logX.append('3')
// const d = await fromEntry(ipfs, testIdentity3, last(logX.values),
// { length: -1 })
// await c.join(d)
// await d.join(c)
// await c.append('DONE')
// await d.append('DONE')
// const f = await fromEntry(ipfs, testIdentity3, last(c.values),
// { amount: -1, exclude: [] })
// const g = await fromEntry(ipfs, testIdentity3, last(d.values),
// { length: -1, exclude: [] })
// strictEqual(f.toString(), bigLogString)
// strictEqual(g.toString(), bigLogString)
// })
// it('retrieves full log of randomly joined log', async () => {
// const log1 = await Log(testIdentity, { logId: 'X' })
// const log2 = await Log(testIdentity3, { logId: 'X' })
// const log3 = await Log(testIdentity4, { logId: 'X' })
// for (let i = 1; i <= 5; i++) {
// await log1.append('entryA' + i)
// }
// for (let i = 1; i <= 5; i++) {
// await log2.append('entryB' + i)
// }
// await log3.join(log1)
// await log3.join(log2)
// for (let i = 6; i <= 10; i++) {
// await log1.append('entryA' + i)
// }
// await log1.join(log3)
// for (let i = 11; i <= 15; i++) {
// await log1.append('entryA' + i)
// }
// const expectedData = [
// 'entryA1', 'entryB1', 'entryA2', 'entryB2',
// 'entryA3', 'entryB3', 'entryA4', 'entryB4',
// 'entryA5', 'entryB5',
// 'entryA6', 'entryA7', 'entryA8', 'entryA9', 'entryA10',
// 'entryA11', 'entryA12', 'entryA13', 'entryA14', 'entryA15'
// ]
// deepStrictEqual(log1.values.map(e => e.payload), expectedData)
// })
// it('retrieves randomly joined log deterministically', async () => {
// const logA = await Log(testIdentity, { logId: 'X' })
// const logB = await Log(testIdentity3, { logId: 'X' })
// const log3 = await Log(testIdentity4, { logId: 'X' })
// const log = await Log(testIdentity2, { logId: 'X' })
// for (let i = 1; i <= 5; i++) {
// await logA.append('entryA' + i)
// }
// for (let i = 1; i <= 5; i++) {
// await logB.append('entryB' + i)
// }
// await log3.join(logA)
// await log3.join(logB)
// for (let i = 6; i <= 10; i++) {
// await logA.append('entryA' + i)
// }
// await log.join(log3)
// await log.append('entryC0')
// await log.join(logA, 16)
// const expectedData = [
// 'entryA1', 'entryB1', 'entryA2', 'entryB2',
// 'entryA3', 'entryB3', 'entryA4', 'entryB4',
// 'entryA5', 'entryB5',
// 'entryA6',
// 'entryC0', 'entryA7', 'entryA8', 'entryA9', 'entryA10'
// ]
// deepStrictEqual(log.values.map(e => e.payload), expectedData)
// })
// it('sorts', async () => {
// const testLog = await createLogWithSixteenEntries(Log, ipfs, identities)
// const log = testLog.log
// const expectedData = testLog.expectedData
// const expectedData2 = [
// 'entryA1', 'entryB1', 'entryA2', 'entryB2',
// 'entryA3', 'entryB3', 'entryA4', 'entryB4',
// 'entryA5', 'entryB5',
// 'entryA6', 'entryA7', 'entryA8', 'entryA9', 'entryA10'
// ]
// const expectedData3 = [
// 'entryA1', 'entryB1', 'entryA2', 'entryB2',
// 'entryA3', 'entryB3', 'entryA4', 'entryB4',
// 'entryA5', 'entryB5', 'entryA6', 'entryC0',
// 'entryA7', 'entryA8', 'entryA9'
// ]
// const expectedData4 = [
// 'entryA1', 'entryB1', 'entryA2', 'entryB2',
// 'entryA3', 'entryB3', 'entryA4', 'entryB4',
// 'entryA5', 'entryA6', 'entryC0', 'entryA7',
// 'entryA8', 'entryA9', 'entryA10'
// ]
// const fetchOrder = log.values.slice().sort(compare)
// deepStrictEqual(fetchOrder.map(e => e.payload), expectedData)
// const reverseOrder = log.values.slice().reverse().sort(compare)
// deepStrictEqual(fetchOrder, reverseOrder)
// const hashOrder = log.values.slice().sort((a, b) => a.hash > b.hash).sort(compare)
// deepStrictEqual(fetchOrder, hashOrder)
// const randomOrder2 = log.values.slice().sort((a, b) => 0.5 - Math.random()).sort(compare)
// deepStrictEqual(fetchOrder, randomOrder2)
// // partial data
// const partialLog = log.values.filter(e => e.payload !== 'entryC0').sort(compare)
// deepStrictEqual(partialLog.map(e => e.payload), expectedData2)
// const partialLog2 = log.values.filter(e => e.payload !== 'entryA10').sort(compare)
// deepStrictEqual(partialLog2.map(e => e.payload), expectedData3)
// const partialLog3 = log.values.filter(e => e.payload !== 'entryB5').sort(compare)
// deepStrictEqual(partialLog3.map(e => e.payload), expectedData4)
// })
// it('sorts deterministically from random order', async () => {
// const testLog = await createLogWithSixteenEntries(Log, ipfs, identities)
// const log = testLog.log
// const expectedData = testLog.expectedData
// const fetchOrder = log.values.slice().sort(compare)
// deepStrictEqual(fetchOrder.map(e => e.payload), expectedData)
// let sorted
// for (let i = 0; i < 1000; i++) {
// const randomOrder = log.values.slice().sort((a, b) => 0.5 - Math.random())
// sorted = randomOrder.sort(compare)
// deepStrictEqual(sorted.map(e => e.payload), expectedData)
// }
// })
// it('sorts entries correctly', async () => {
// const testLog = await createLogWithTwoHundredEntries(Log, ipfs, identities)
// const log = testLog.log
// const expectedData = testLog.expectedData
// deepStrictEqual(log.values.map(e => e.payload), expectedData)
// })
// it('sorts entries according to custom tiebreaker function', async () => {
// const testLog = await createLogWithSixteenEntries(Log, ipfs, identities)
// const firstWriteWinsLog =
// Log(identities[0], { logId: 'X', sortFn: FirstWriteWins })
// await firstWriteWinsLog.join(testLog.log)
// deepStrictEqual(firstWriteWinsLog.values.map(e => e.payload),
// firstWriteExpectedData)
// })
// it('throws an error if the tiebreaker returns zero', async () => {
// const testLog = await createLogWithSixteenEntries(Log, ipfs, identities)
// const firstWriteWinsLog =
// Log(identities[0], { logId: 'X', sortFn: BadComparatorReturnsZero })
// await firstWriteWinsLog.join(testLog.log)
// throws(() => firstWriteWinsLog.values, Error, 'Error Thrown')
// })
// it('retrieves partially joined log deterministically - single next pointer', async () => {
// const nextPointerAmount = 1
// const logA = await Log(testIdentity, { logId: 'X' })
// const logB = await Log(testIdentity3, { logId: 'X' })
// const log3 = await Log(testIdentity4, { logId: 'X' })
// const log = await Log(testIdentity2, { logId: 'X' })
// for (let i = 1; i <= 5; i++) {
// await logA.append('entryA' + i, nextPointerAmount)
// }
// for (let i = 1; i <= 5; i++) {
// await logB.append('entryB' + i, nextPointerAmount)
// }
// await log3.join(logA)
// await log3.join(logB)
// for (let i = 6; i <= 10; i++) {
// await logA.append('entryA' + i, nextPointerAmount)
// }
// await log.join(log3)
// await log.append('entryC0', nextPointerAmount)
// await log.join(logA)
// const hash = await log.toMultihash()
// // First 5
// let res = await _fromMultihash(ipfs, testIdentity2, hash, { length: 5 })
// const first5 = [
// 'entryC0', 'entryA7', 'entryA8', 'entryA9', 'entryA10'
// ]
// deepStrictEqual(res.values.map(e => e.payload), first5)
// // First 11
// res = await _fromMultihash(ipfs, testIdentity2, hash, { length: 11 })
// const first11 = [
// 'entryB3', 'entryA4', 'entryB4',
// 'entryA5', 'entryB5',
// 'entryA6',
// 'entryC0', 'entryA7', 'entryA8', 'entryA9', 'entryA10'
// ]
// deepStrictEqual(res.values.map(e => e.payload), first11)
// // All but one
// res = await _fromMultihash(ipfs, testIdentity2, hash, { length: 16 - 1 })
// const all = [
// /* excl */ 'entryB1', 'entryA2', 'entryB2', 'entryA3', 'entryB3',
// 'entryA4', 'entryB4', 'entryA5', 'entryB5',
// 'entryA6',
// 'entryC0', 'entryA7', 'entryA8', 'entryA9', 'entryA10'
// ]
// deepStrictEqual(res.values.map(e => e.payload), all)
// })
// it('retrieves partially joined log deterministically - multiple next pointers', async () => {
// const nextPointersAmount = 64
// const logA = await Log(testIdentity, { logId: 'X' })
// const logB = await Log(testIdentity3, { logId: 'X' })
// const log3 = await Log(testIdentity4, { logId: 'X' })
// const log = await Log(testIdentity2, { logId: 'X' })
// for (let i = 1; i <= 5; i++) {
// await logA.append('entryA' + i, nextPointersAmount)
// }
// for (let i = 1; i <= 5; i++) {
// await logB.append('entryB' + i, nextPointersAmount)
// }
// await log3.join(logA)
// await log3.join(logB)
// for (let i = 6; i <= 10; i++) {
// await logA.append('entryA' + i, nextPointersAmount)
// }
// await log.join(log3)
// await log.append('entryC0', nextPointersAmount)
// await log.join(logA)
// const hash = await log.toMultihash()
// // First 5
// let res = await _fromMultihash(ipfs, testIdentity2, hash, { length: 5 })
// const first5 = [
// 'entryC0', 'entryA7', 'entryA8', 'entryA9', 'entryA10'
// ]
// deepStrictEqual(res.values.map(e => e.payload), first5)
// // First 11
// res = await _fromMultihash(ipfs, testIdentity2, hash, { length: 11 })
// const first11 = [
// 'entryB3', 'entryA4', 'entryB4', 'entryA5',
// 'entryB5', 'entryA6',
// 'entryC0',
// 'entryA7', 'entryA8', 'entryA9', 'entryA10'
// ]
// deepStrictEqual(res.values.map(e => e.payload), first11)
// // All but one
// res = await _fromMultihash(ipfs, testIdentity2, hash, { length: 16 - 1 })
// const all = [
// /* excl */ 'entryB1', 'entryA2', 'entryB2', 'entryA3', 'entryB3',
// 'entryA4', 'entryB4', 'entryA5', 'entryB5',
// 'entryA6',
// 'entryC0', 'entryA7', 'entryA8', 'entryA9', 'entryA10'
// ]
// deepStrictEqual(res.values.map(e => e.payload), all)
// })
// it('throws an error if ipfs is not defined', async () => {
// let err
// try {
// await fromEntry()
// } catch (e) {
// err = e
// }
// notStrictEqual(err, null)
// strictEqual(err.message, 'IPFS instance not defined')
// })
// describe('fetches a log', () => {
// const amount = 100
// let items1 = []
// let items2 = []
// let items3 = []
// let log1, log2, log3
// beforeEach(async () => {
// const ts = new Date().getTime()
// log1 = await Log(testIdentity, { logId: 'X' })
// log2 = await Log(testIdentity2, { logId: 'X' })
// log3 = await Log(testIdentity3, { logId: 'X' })
// items1 = []
// items2 = []
// items3 = []
// for (let i = 1; i <= amount; i++) {
// const prev1 = last(items1)
// const prev2 = last(items2)
// const prev3 = last(items3)
// const n1 = await create(ipfs, log1._identity, log1.id, 'entryA' + i + '-' + ts, [prev1], log1.clock())
// const n2 = await create(ipfs, log2._identity, log2.id, 'entryB' + i + '-' + ts, [prev2, n1], log2.clock())
// const n3 = await create(ipfs, log3._identity, log3.id, 'entryC' + i + '-' + ts, [prev3, n1, n2], log3.clock())
// log1.clock().tick()
// log2.clock().tick()
// log3.clock().tick()
// log1.clock().merge(log2.clock())
// log1.clock().merge(log3.clock())
// log2.clock().merge(log1.clock())
// log2.clock().merge(log3.clock())
// log3.clock().merge(log1.clock())
// log3.clock().merge(log2.clock())
// items1.push(n1)
// items2.push(n2)
// items3.push(n3)
// }
// })
// it('returns all entries - no excluded entries', async () => {
// const a = await fromEntry(ipfs, testIdentity, last(items1),
// { length: -1 })
// strictEqual(a.length, amount)
// strictEqual(a.values[0].hash, items1[0].hash)
// })
// it('returns all entries - including excluded entries', async () => {
// // One entry
// const a = await fromEntry(ipfs, testIdentity, last(items1),
// { length: -1, exclude: [items1[0]] })
// strictEqual(a.length, amount)
// strictEqual(a.values[0].hash, items1[0].hash)
// // All entries
// const b = await fromEntry(ipfs, testIdentity, last(items1),
// { length: -1, exclude: items1 })
// strictEqual(b.length, amount)
// strictEqual(b.values[0].hash, items1[0].hash)
// })
// it('respects timeout parameter', async () => {
// const e = last(items1)
// e.hash = 'zdpuAwNuRc2Kc1aNDdcdSWuxfNpHRJQw8L8APBNHCEFXbogus'
// const timeout = 500
// const st = new Date().getTime()
// const log = await fromEntry(ipfs, testIdentity, e, { timeout })
// const et = new Date().getTime()
// strictEqual((et - st) >= (timeout - 10), true, '' + (et - st) + ' should be greater than timeout ' + timeout)
// strictEqual(log.length, 1)
// deepStrictEqual(log.values.map(e => e.payload), [e.payload])
// })
// })
// })
// })
// })