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{node: '>=8'} + dev: true + + /path-is-absolute/1.0.1: + resolution: {integrity: sha1-F0uSaHNVNP+8es5r9TpanhtcX18=} + engines: {node: '>=0.10.0'} + dev: true + + /pathval/1.1.1: + resolution: {integrity: sha512-Dp6zGqpTdETdR63lehJYPeIOqpiNBNtc7BpWSLrOje7UaIsE5aY92r/AunQA7rsXvet3lrJ3JnZX29UPTKXyKQ==} + dev: true + /picomatch/2.3.0: resolution: {integrity: sha512-lY1Q/PiJGC2zOv/z391WOTD+Z02bCgsFfvxoXXf6h7kv9o+WmsmzYqrAwY63sNgOxE4xEdq0WyUnXfKeBrSvYw==} engines: {node: '>=8.6'} @@ -629,6 +912,12 @@ packages: escape-goat: 2.1.1 dev: true + /randombytes/2.1.0: + resolution: {integrity: sha512-vYl3iOX+4CKUWuxGi9Ukhie6fsqXqS9FE2Zaic4tNFD2N2QQaXOMFbuKK4QmDHC0JO6B1Zp41J0LpT0oR68amQ==} + dependencies: + safe-buffer: 5.2.1 + dev: true + /rc/1.2.8: resolution: {integrity: sha512-y3bGgqKj3QBdxLbLkomlohkvsA8gdAiUQlSBJnBhfn+BPxg4bc62d8TcBW15wavDfgexCgccckhcZvywyQYPOw==} hasBin: true @@ -660,12 +949,21 @@ packages: rc: 1.2.8 dev: true + /require-directory/2.1.1: + resolution: {integrity: sha1-jGStX9MNqxyXbiNE/+f3kqam30I=} + engines: {node: '>=0.10.0'} + dev: true + /responselike/1.0.2: resolution: {integrity: sha1-kYcg7ztjHFZCvgaPFa3lpG9Loec=} dependencies: lowercase-keys: 1.0.1 dev: true + /safe-buffer/5.2.1: + resolution: {integrity: sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==} + dev: true + /semver-diff/3.1.1: resolution: {integrity: sha512-GX0Ix/CJcHyB8c4ykpHGIAvLyOwOobtM/8d+TQkAd81/bEjgPHrfba41Vpesr7jX/t8Uh+R3EX9eAS5be+jQYg==} engines: {node: '>=8'} @@ -683,10 +981,24 @@ packages: hasBin: true dev: true + /serialize-javascript/6.0.0: + resolution: {integrity: sha512-Qr3TosvguFt8ePWqsvRfrKyQXIiW+nGbYpy8XK24NQHE83caxWt+mIymTT19DGFbNWNLfEwsrkSmN64lVWB9ag==} + dependencies: + randombytes: 2.1.0 + dev: true + /signal-exit/3.0.3: resolution: {integrity: sha512-VUJ49FC8U1OxwZLxIbTTrDvLnf/6TDgxZcK8wxR8zs13xpx7xbG60ndBlhNrFi2EMuFRoeDoJO7wthSLq42EjA==} dev: true + /string-width/2.1.1: + resolution: {integrity: 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dev: true + /supports-color/5.5.0: resolution: {integrity: sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==} engines: {node: '>=4'} @@ -738,6 +1062,13 @@ packages: has-flag: 4.0.0 dev: true + /supports-color/8.1.1: + resolution: {integrity: sha512-MpUEN2OodtUzxvKQl72cUF7RQ5EiHsGvSsVG0ia9c5RbWGL2CI4C7EpPS8UTBIplnlzZiNuV56w+FuNxy3ty2Q==} + engines: {node: '>=10'} + dependencies: + has-flag: 4.0.0 + dev: true + /term-size/2.2.1: resolution: {integrity: sha512-wK0Ri4fOGjv/XPy8SBHZChl8CM7uMc5VML7SqiQ0zG7+J5Vr+RMQDoHa2CNT6KHUnTGIXH34UDMkPzAUyapBZg==} engines: {node: '>=8'} @@ -793,6 +1124,11 @@ packages: yn: 3.1.1 dev: true + /type-detect/4.0.8: + resolution: {integrity: sha512-0fr/mIH1dlO+x7TlcMy+bIDqKPsw/70tVyeHW787goQjhmqaZe10uwLujubK9q9Lg6Fiho1KUKDYz0Z7k7g5/g==} + engines: {node: '>=4'} + dev: true + /type-fest/0.8.1: resolution: {integrity: sha512-4dbzIzqvjtgiM5rw1k5rEHtBANKmdudhGyBEajN01fEyhaAIhsoKNy6y7+IN93IfpFtwY9iqi7kD+xwKhQsNJA==} engines: {node: '>=8'} @@ -849,6 +1185,20 @@ packages: prepend-http: 2.0.0 dev: true + /which/2.0.2: + resolution: {integrity: sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==} + engines: {node: '>= 8'} + hasBin: true + dependencies: + isexe: 2.0.0 + dev: true + + /wide-align/1.1.3: + resolution: {integrity: sha512-QGkOQc8XL6Bt5PwnsExKBPuMKBxnGxWWW3fU55Xt4feHozMUhdUMaBCk290qpm/wG5u/RSKzwdAC4i51YigihA==} + dependencies: + string-width: 2.1.1 + dev: true + /widest-line/3.1.0: resolution: {integrity: sha512-NsmoXalsWVDMGupxZ5R08ka9flZjjiLvHVAWYOKtiKM8ujtZWr9cRffak+uSE48+Ob8ObalXpwyeUiyDD6QFgg==} engines: {node: '>=8'} @@ -856,6 +1206,19 @@ packages: string-width: 4.2.2 dev: true + /workerpool/6.1.5: + resolution: {integrity: sha512-XdKkCK0Zqc6w3iTxLckiuJ81tiD/o5rBE/m+nXpRCB+/Sq4DqkfXZ/x0jW02DG1tGsfUGXbTJyZDP+eu67haSw==} + dev: true + + /wrap-ansi/7.0.0: + resolution: {integrity: sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==} + engines: {node: '>=10'} + dependencies: + ansi-styles: 4.3.0 + string-width: 4.2.2 + strip-ansi: 6.0.0 + dev: true + /wrappy/1.0.2: resolution: {integrity: sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=} dev: true @@ -874,7 +1237,45 @@ packages: engines: {node: '>=8'} dev: true + /y18n/5.0.8: + resolution: {integrity: sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA==} + engines: {node: '>=10'} + dev: true + + /yargs-parser/20.2.4: + resolution: {integrity: sha512-WOkpgNhPTlE73h4VFAFsOnomJVaovO8VqLDzy5saChRBFQFBoMYirowyW+Q9HB4HFF4Z7VZTiG3iSzJJA29yRA==} + engines: {node: '>=10'} + dev: true + + /yargs-unparser/2.0.0: + resolution: {integrity: sha512-7pRTIA9Qc1caZ0bZ6RYRGbHJthJWuakf+WmHK0rVeLkNrrGhfoabBNdue6kdINI6r4if7ocq9aD/n7xwKOdzOA==} + engines: {node: '>=10'} + dependencies: + camelcase: 6.2.0 + decamelize: 4.0.0 + flat: 5.0.2 + is-plain-obj: 2.1.0 + dev: true + + /yargs/16.2.0: + resolution: {integrity: sha512-D1mvvtDG0L5ft/jGWkLpG1+m0eQxOfaBvTNELraWj22wSVUMWxZUvYgJYcKh6jGGIkJFhH4IZPQhR4TKpc8mBw==} + engines: {node: '>=10'} + dependencies: + cliui: 7.0.4 + escalade: 3.1.1 + get-caller-file: 2.0.5 + require-directory: 2.1.1 + string-width: 4.2.2 + y18n: 5.0.8 + yargs-parser: 20.2.4 + dev: true + /yn/3.1.1: resolution: {integrity: sha512-Ux4ygGWsu2c7isFWe8Yu1YluJmqVhxqK2cLXNQA5AcC3QfbGNpM7fu0Y8b/z16pXLnFxZYvWhd3fhBY9DLmC6Q==} engines: {node: '>=6'} dev: true + + /yocto-queue/0.1.0: + resolution: {integrity: sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q==} + engines: {node: '>=10'} + dev: true diff --git a/src/datasources/fs.ts b/src/datasources/fs.ts index bc1e59d..2b93ea0 100644 --- a/src/datasources/fs.ts +++ b/src/datasources/fs.ts @@ -10,6 +10,8 @@ export default class FSDataStore implements IDataStore { } async get(name: string) { + if (!await this.has(name)) + return undefined; return Fs.promises.readFile(Path.join(this.#path, name)); } @@ -34,11 +36,11 @@ export default class FSDataStore implements IDataStore { //TODO: This is not atomic yet! FIX while ((await this.has("lock")) || this.#l) { try { - let con = (await this.get("lock")).toString("utf-8"); + let con = (await this.get("lock") as Buffer).toString("utf-8"); if (Number(con) < Date.now() - 10000) break; await new Promise((y) => setTimeout(y, 10)); - } catch (err) {} + } catch (err) { } } this.#l = true; diff --git a/src/repo.ts b/src/repo.ts index 26a7f75..7d32f96 100644 --- a/src/repo.ts +++ b/src/repo.ts @@ -2,7 +2,7 @@ import SHA from "jssha"; import Path from "./helper/path"; export interface IDataStore { - get(key: string): Promise; + get(key: string): Promise; set(key: string, data: Uint8Array): Promise; has(key: string): Promise; close?: () => Promise; @@ -22,6 +22,14 @@ export type Commit = { date: Date; }; +export type NodeLog = { + /** + * ObjectID of the data. Can be undefined if element was deleted! + */ + id: string | undefined; + commit: Commit +} + // TODOs: // - HEAD locks // - HEAD/Tree Cache @@ -29,12 +37,16 @@ export type Commit = { // - Add DataStore Locking for access from multiple sources export default class Repository { + //#region local variables #store: IDataStore; + //#endregion constructor(store: IDataStore) { this.#store = store; } + //#region private + private sha1(data: Uint8Array) { const s = new SHA("SHA-1", "UINT8ARRAY"); s.update(data); @@ -50,11 +62,9 @@ export default class Repository { private splitPath(path: string) { const resolved = Path.resolve(path).slice(1); if (resolved == "") return []; - return resolved.split(Path.delimiter); + return resolved.split(Path.sep); } - private getHeadLock() {} - private async writeObject(data: Uint8Array | string): Promise { if (typeof data == "string") { data = new TextEncoder().encode(data); @@ -68,9 +78,9 @@ export default class Repository { return this.#store.has("objects/" + id); } - private async readObject(id: string, string: true): Promise; - private async readObject(id: string, string?: false): Promise; - private async readObject(id: string, string = false): Promise { + private async readObject(id: string, string: true): Promise; + private async readObject(id: string, string?: false): Promise; + private async readObject(id: string, string = false): Promise { let data = await this.#store.get("objects/" + id); if (string) { return new TextDecoder().decode(data); @@ -79,94 +89,7 @@ export default class Repository { } } - async clean() { - // TODO: Cleanup broken things - } - - async readdir(path: string): Promise { - const parts = this.splitPath(path); - console.log({ parts }); - const head = await this.readHead(); - if (!head) return undefined; - - const treeID = await this.treeFindObjectID(head.root, parts, "tree"); - - if (!treeID) return undefined; - - return this.readTree(treeID); - } - - async read(path: string): Promise { - const parts = this.splitPath(path); - const head = await this.readHead(); - if (!head) return undefined; - - const objectID = await this.treeFindObjectID(head.root, parts, "blob"); - - if (!objectID) return undefined; - - return this.readObject(objectID); - } - - async write(path: string, data: Uint8Array) { - const parts = this.splitPath(path); - - const objectID = await this.writeObject(data); - - const lock = await this.#store.getLock(); - try { - //TODO: Improve need of locking. - const head = await this.readHead(); - - const makeTree = async (treeID: string | undefined, parts: string[]) => { - let tree: TreeEntry[]; - if (treeID) { - tree = await this.readTree(treeID); - } else { - tree = []; - } - - const current = parts[0]; - - let existing = tree.findIndex(([, , name]) => name == current); - - let entry: TreeEntry; - - if (parts.length == 1) { - entry = ["blob", objectID, current]; - } else { - entry = [ - "tree", - await makeTree(existing >= 0 ? tree[existing][1] : undefined, parts.slice(1)), - current, - ]; - } - - if (existing >= 0) { - let ex = tree[existing]; - if (parts.length == 1 && ex[0] == "tree") - throw new Error("This change would overwrite a folder!"); - tree[existing] = entry; - } else { - tree.push(entry); - } - - let treeString = tree.map(([type, hash, name]) => `${type} ${hash} ${name}`).join("\n"); - - let newTreeID = await this.writeObject(treeString); - - return newTreeID; - }; - - let newTree = await makeTree(head?.root, parts); - let commit = await this.makeCommit(newTree, head); - await this.writeHead(commit); - } finally { - await lock(); - } - } - - async treeFindObjectID( + private async treeFindObjectID( treeID: string, parts: string[], type: NodeType @@ -192,9 +115,10 @@ export default class Repository { } } - async readTree(id: string): Promise { + private async readTree(id: string): Promise { const tree = await this.readObject(id, true); - return tree.split("\n").map((e) => { + if (tree == undefined) throw new Error("Invalid treeID"); + return tree.split("\n").filter(e => e !== "").map((e) => { const entry = e.split(" ") as TreeEntry; const [type] = entry; @@ -210,7 +134,7 @@ export default class Repository { }); } - async makeCommit(treeID: string, old?: Commit) { + private async makeCommit(treeID: string, old?: Commit) { if (!old) { // Could be called once more than necessary, if no HEAD exists. old = await this.readHead(); @@ -221,10 +145,10 @@ export default class Repository { return await this.writeObject(commitStr); } - async readCommit(id: string): Promise { - if (!(await this.hasObject(id))) throw new Error(`Commit with id ${id} not found!`); - + private async readCommit(id: string): Promise { const commitStr = await this.readObject(id, true); + if (!commitStr) + throw new Error(`Commit with id ${id} not found!`); let commit: Commit = { id } as any; for (const entry of commitStr.split("\n")) { @@ -236,8 +160,10 @@ export default class Repository { break; case "before": // TODO: Simple validity checks commit.before = value; + break; case "date": commit.date = new Date(value); + break; } } @@ -248,18 +174,177 @@ export default class Repository { return commit; } - async readHead(): Promise { + private async readHead(): Promise { if (!(await this.#store.has("HEAD"))) return undefined; const head = new TextDecoder().decode(await this.#store.get("HEAD")); return this.readCommit(head); } - async writeHead(commitID: string): Promise { + private async writeHead(commitID: string): Promise { await this.#store.set("HEAD", new TextEncoder().encode(commitID)); } + //#endregion + + + //#region public + async clean() { + // TODO: Cleanup broken things + } + + async readdir(path: string): Promise { + const parts = this.splitPath(path); + const head = await this.readHead(); + if (!head) return []; + + const treeID = await this.treeFindObjectID(head.root, parts, "tree"); + + if (!treeID) return []; + + return this.readTree(treeID); + } + + async read(path: string): Promise { + const parts = this.splitPath(path); + const head = await this.readHead(); + if (!head) return undefined; + + const objectID = await this.treeFindObjectID(head.root, parts, "blob"); + + if (!objectID) return undefined; + + return this.readObject(objectID); + } + + async readByID(id: string) { + return this.readObject(id); + } + + async log(path: string): Promise { + const parts = this.splitPath(path); + const head = await this.readHead(); + if (!head) return []; + + let currObjectID = await this.treeFindObjectID(head.root, parts, "blob"); + + let history: NodeLog[] = []; + + if (currObjectID) { + history.push({ + id: currObjectID, + commit: head + }) + } + + let currCommit = head.before; + + while (currCommit !== undefined) { + try { + let commit = await this.readCommit(currCommit); + let res = await this.treeFindObjectID(commit.root, parts, "blob"); + if (res !== currObjectID) { + history.push({ + id: res, + commit, + }); + } + currObjectID = res; + currCommit = commit.before; + } catch (err) { + break; + } + } + + return history; + } + + + async delete(path: string) { + return this.write(path, undefined); + } + + async write(path: string, data: Uint8Array | undefined) { + const parts = this.splitPath(path); + + let objectID: string | undefined = undefined; + if (data) { + objectID = await this.writeObject(data); + } + + const lock = await this.#store.getLock(); + //TODO: Improve need of locking. + try { + const head = await this.readHead(); + + const makeTree = async (treeID: string | undefined, parts: string[]) => { + let tree: TreeEntry[]; + if (treeID) { + tree = await this.readTree(treeID); + } else { + tree = []; + } + + const current = parts[0]; + + let existing = tree.findIndex(([, , name]) => name == current); + + let entry: TreeEntry | undefined = undefined; + + if (parts.length == 1) { + if (objectID) { + entry = ["blob", objectID, current]; + } + } else { + let newTreeID = await makeTree(existing >= 0 ? tree[existing][1] : undefined, parts.slice(1)); + if (newTreeID) { + entry = [ + "tree", + newTreeID, + current, + ]; + } + } + + if (existing >= 0) { + let ex = tree[existing]; + if (parts.length == 1 && ex[0] == "tree") + throw new Error("This change would overwrite a folder!"); + if (entry) + tree[existing] = entry; + else { + tree = [...tree.slice(0, existing), ...tree.slice(existing + 1)]; + } + } else { + if (entry) + tree.push(entry); + } + + if (tree.length > 0) { + let treeString = tree.map(([type, hash, name]) => `${type} ${hash} ${name}`).join("\n"); + + let newTreeID = await this.writeObject(treeString); + + return newTreeID; + } else { + return undefined; + } + }; + + let newTree = await makeTree(head?.root, parts); + if (!newTree) { //TODO: Is this what i want? + newTree = await this.writeObject(""); + } + let commit = await this.makeCommit(newTree, head); + await this.writeHead(commit); + } finally { + await lock(); + } + } + async close() { if (this.#store.close) return this.#store?.close(); } + + //#endregion } diff --git a/src/test.ts b/src/test.ts index d835576..bf4a32a 100644 --- a/src/test.ts +++ b/src/test.ts @@ -1,27 +1,164 @@ -import Repository from "./repo"; +import Repository, { IDataStore } from "./repo"; import FSDataStore from "./datasources/fs"; import * as Fs from "fs"; +import { expect } from "chai"; +import * as Crypto from "crypto"; const t = (t: string) => new TextEncoder().encode(t); +const td = (t: Uint8Array | undefined) => new TextDecoder().decode(t); +const exists = (path: string) => Fs.promises.access(path).then(() => true).catch(() => false) -async function test() { - await Fs.promises.rm("./testrepo", { recursive: true, force: true }); - const ds = new FSDataStore("./testrepo"); - const rep = new Repository(ds); +let test = 0; +let repoPath = ""; - console.log(new TextDecoder().decode(await rep.read("hi.txt"))); +beforeEach(async () => { + repoPath = "./testrepo_" + test; + console.log(" \tRunning at repo:", repoPath); + await Fs.promises.rm(repoPath, { recursive: true, force: true }); +}) - await Promise.all([ - rep.write("hi.txt", t("Hallo Welt: " + new Date().toLocaleString())), - rep.write("hi_hallo.txt", t("Hallo Welt: " + new Date().toLocaleString())), - rep.write("hi_hallo3.txt", t("Hallo Welt: " + new Date().toLocaleString())), - ]); +afterEach(async () => { + test++; +}) - console.log(new TextDecoder().decode(await rep.read("hi.txt"))); +describe("NodeJS DataStore", () => { + it("should throw error when creating new instance", () => { + const ds = new FSDataStore(repoPath); + expect(ds).to.not.be.undefined; + }) - console.log((await rep.readdir("/"))?.map((e) => e[2])); + it("should return undefined on read on non-existant field", async () => { + const ds = new FSDataStore(repoPath); + let val = await ds.get("test"); + expect(val).to.be.undefined; + }) - await rep.close(); -} + it("should not fail when writing a new key and create the necessary files", async () => { + const ds = new FSDataStore(repoPath); + const text = "Hallo Welt"; + await ds.set("test", t(text)); -test(); + let ex = await exists(repoPath + "/test"); + expect(ex).to.be.true; + + let file_cont = await Fs.promises.readFile(repoPath + "/test", "utf-8"); + expect(file_cont).to.equal(text); + }) + + it("has should return false on non-existing field", async () => { + const ds = new FSDataStore(repoPath); + expect(await ds.has("test")).to.be.false; + }) + + it("has should return true on existing field", async () => { + const ds = new FSDataStore(repoPath); + const cont = t("Hallo Welt"); + await ds.set("test", cont); + + let ex = await exists(repoPath + "/test"); + expect(ex).to.be.true; + }) + + it("get should return value of existing field", async () => { + const ds = new FSDataStore(repoPath); + const text = "Hallo Welt"; + await ds.set("test", t(text)); + + expect(td(await ds.get("test"))).to.equal(text); + }) +}) + +describe("Basic Repo functions", () => { + let ds: IDataStore = new FSDataStore(repoPath); + beforeEach(() => { + ds = new FSDataStore(repoPath); + }) + + it("should not throw error when creating new instance", () => { + const repo = new Repository(ds) + expect(repo).to.not.be.undefined; + }) + + it("should return an empty list on an empty repository", async () => { + const repo = new Repository(ds) + const list = await repo.readdir("/"); + expect(list).to.be.an("array"); + expect(list.length).to.equal(0) + }) + + it("should return undefined on non-existant file", async () => { + const repo = new Repository(ds) + let res = await repo.read("test"); + expect(res).to.be.undefined; + }) + + it("should be possible to write data", async () => { + const testData = "Hallo Welt"; + const repo = new Repository(ds) + await repo.write("test", t(testData)); + + let res = await Fs.promises.readdir(repoPath + "/objects"); + expect(res.length).to.be.equal(3); + + expect(await exists(repoPath + "/HEAD")).to.be.true; + }) + + it("should be possible to write nested data", async () => { + const testData = "Hallo Welt"; + const repo = new Repository(ds) + await repo.write("test/hallo-welt", t(testData)); + + let res = await Fs.promises.readdir(repoPath + "/objects"); + + expect(res.length).to.be.equal(4); + expect(await exists(repoPath + "/HEAD")).to.be.true; + }) + + it("readdir should return the given entries", async () => { + const testData = "Hallo Welt"; + const repo = new Repository(ds) + await repo.write("test/hallo-welt", t(testData)); + await repo.write("tests", t(testData)); + + const res = await repo.readdir("/") + expect(res.length).to.be.equal(2); + // expect(res).to.include. + }) + + it("should be possible to read back written data", async () => { + const testData = "Hallo Welt"; + const repo = new Repository(ds) + await repo.write("test", t(testData)); + + const res = await repo.read("test"); + expect(td(res)).to.equal(testData); + }) + + it("should be possible to delete entries", async () => { + const testData = "Hallo Welt"; + const repo = new Repository(ds) + await repo.write("test", t(testData)); + + const res = await repo.read("test"); + expect(td(res)).to.equal(testData); + + await repo.delete("test"); + + const res2 = await repo.read("test"); + expect(res2).to.be.undefined; + }) + + it("should be possible to get a list of all versions of a file", async () => { + const testData = "Hallo Welt"; + const repo = new Repository(ds) + await repo.write("test", t(testData)); + await repo.write("test", t(testData + 1)); + await repo.write("test", t(testData + 2)); + await repo.write("test", t(testData + 3)); + await repo.write("test", t(testData + 4)); + + const res = await repo.log("test"); + expect(res).to.not.be.undefined; + expect(res.length).to.equal(5); + }) +}) \ No newline at end of file