kohremote.test.ts

1// Covers addendum A2 part 2: Koh's own remote layout, served read-only from a public repo's mirror.2import { describe, expect, test } from "bun:test";3import { join } from "node:path";4import { inflateSync } from "node:zlib";5import { blake3 } from "@noble/hashes/blake3.js";6import { bytesToHex } from "@noble/hashes/utils.js";7import { openBucket } from "../src/bucket/reader.ts";8import { syncAll } from "../src/bucket/sync.ts";9import { instance } from "./browser.ts";10import { makeKohBucket } from "./fixture.ts";1112const REPO = "mirror";13const NOT_FOUND = '{"error":"repo_not_found","message":"repo not found"}';14const fixture = await makeKohBucket(REPO);15const inst = await instance(fixture.bucketDir);16inst.kepr.run("UPDATE repos SET public = 1");1718const head = fixture.saveIds[0] ?? "";19const checkpoint = fixture.saveIds[1] ?? "";20const oldest = fixture.saveIds[fixture.saveIds.length - 1] ?? "";21const get = (path: string) => inst.app.request(`/${REPO}/koh/${path}`);22const record = async (id: string) => JSON.parse(await (await get(`saves/${id}`)).text());2324async function resync() {25	await syncAll({26		bucket: openBucket(inst.config.bucket),27		kepr: inst.kepr,28		mirrorDir: join(inst.dataDir, "mirror"),29	});30}3132describe.serial("Koh's remote layout from the mirror", () => {33	test("the format, the head and the caches the addendum names", async () => {34		const format = await get("format");35		expect(format.status).toBe(200);36		expect(await format.text()).toBe("koh-remote 1");37		expect(format.headers.get("cache-control")).toBe("private, max-age=86400");38		const headResponse = await get("head");39		expect(headResponse.status).toBe(200);40		expect(await headResponse.text()).toBe(head);41		expect(headResponse.headers.get("cache-control")).toBe("no-cache");42	});4344	test("a save record is Koh's, field for field, and checkpoints are part of the chain", async () => {45		const response = await get(`saves/${head}`);46		expect(response.status).toBe(200);47		expect(response.headers.get("cache-control")).toBe("private, max-age=60");48		const save = await record(head);49		expect(Object.keys(save)).toEqual([50			"id",51			"parent",52			"message",53			"created_at",54			"machine",55			"is_checkpoint",56			"size_bytes",57			"agent",58			"session",59			"restores",60			"replayed_from",61			"files",62		]);63		expect(save.id).toBe(head);64		expect(save.parent).toBe(checkpoint);65		// The mirror only keeps columns, so this is the proof that what it re-serves is what Koh66		// wrote, byte shape and all: empty optionals as "", booleans as booleans, no extra member.67		const written = await Bun.file(join(fixture.bucketDir, REPO, "saves", head)).json();68		expect(save).toEqual(written);69		expect(typeof save.size_bytes).toBe("number");70		expect(typeof save.is_checkpoint).toBe("boolean");71		expect(save.agent).toBe("");72		expect(Object.keys(save.files[0])).toEqual(["path", "hash", "executable"]);73		// The chain needs checkpoints, so these routes serve what the pages hide.74		const chain = await get(`saves/${checkpoint}`);75		expect(chain.status).toBe(200);76		expect((await record(checkpoint)).is_checkpoint).toBe(true);77		expect((await inst.app.request(`/${REPO}/saves/${checkpoint}`)).status).toBe(404);78	});7980	test("the save and object prefixes list what a steal walks", async () => {81		const saves = await get("saves");82		expect(saves.status).toBe(200);83		expect(saves.headers.get("cache-control")).toBe("no-cache");84		expect((await saves.text()).trim().split("\n")).toContain(head);85		const save = await record(head);86		const objects = await get("objects");87		expect(objects.status).toBe(200);88		expect(objects.headers.get("cache-control")).toBe("no-cache");89		expect((await objects.text()).trim().split("\n")).toContain(save.files[0].hash);90	});9192	test("an object is the stored zlib bytes and hashes back to its key", async () => {93		const save = await record(head);94		const file = save.files.find((entry: { path: string }) => entry.path === "src/main.ts");95		const object = await get(`objects/${file.hash}`);96		expect(object.status).toBe(200);97		expect(object.headers.get("cache-control")).toBe("private, max-age=31536000");98		expect(object.headers.get("cache-control")).not.toContain("immutable");99		const bytes = new Uint8Array(await object.arrayBuffer());100		expect(bytesToHex(blake3(inflateSync(bytes)))).toBe(file.hash);101		expect(new TextDecoder().decode(inflateSync(bytes))).toContain("hello");102	});103104	test("the events are IDs, one per line, and one event is Koh's record", async () => {105		const events = await get("events");106		expect(events.status).toBe(200);107		expect(events.headers.get("cache-control")).toBe("no-cache");108		const ids = (await events.text()).trim().split("\n");109		expect(ids.length).toBeGreaterThan(0);110		const one = await get(`events/${ids[0]}`);111		expect(one.status).toBe(200);112		expect(one.headers.get("cache-control")).toBe("private, max-age=86400");113		const event = JSON.parse(await one.text());114		expect(Object.keys(event)).toEqual([115			"id",116			"kind",117			"save_id",118			"path",119			"reason",120			"created_at",121			"machine",122		]);123		const written = await Bun.file(join(fixture.bucketDir, REPO, "events", ids[0] ?? "")).json();124		expect(event).toEqual(written);125	});126127	test("a private repo answers exactly as an unknown one", async () => {128		inst.kepr.run("UPDATE repos SET public = 0");129		try {130			for (const path of [131				"format",132				"head",133				"events",134				"saves",135				"objects",136				`saves/${head}`,137				`objects/${"a".repeat(64)}`,138				`events/${"b".repeat(12)}`,139			]) {140				const private_ = await get(path);141				const unknown = await inst.app.request(`/no-such-repo/koh/${path}`);142				const mine = `${private_.status} ${await private_.text()}`;143				expect(mine).toBe(`${unknown.status} ${await unknown.text()}`);144				expect(mine).toBe(`404 ${NOT_FOUND}`);145				expect(private_.headers.get("content-type")).toBe(unknown.headers.get("content-type"));146				expect(private_.headers.get("cache-control")).toBe(unknown.headers.get("cache-control"));147			}148		} finally {149			inst.kepr.run("UPDATE repos SET public = 1");150		}151	});152153	test("an ID or hash the mirror does not hold answers the same 404", async () => {154		for (const path of [155			`saves/${"0".repeat(12)}`,156			"saves/not-an-id",157			`objects/${"f".repeat(64)}`,158		]) {159			const response = await get(path);160			expect(`${response.status} ${await response.text()}`).toBe(`404 ${NOT_FOUND}`);161		}162	});163164	test("a stripped path leaves the record and the object the mirror serves", async () => {165		const before = await record(oldest);166		const secret = before.files.find((entry: { path: string }) => entry.path === "secret.txt");167		expect(secret).toBeDefined();168		await fixture.strip("secret.txt");169		await resync();170		const after = await record(oldest);171		expect(after.files.some((entry: { path: string }) => entry.path === "secret.txt")).toBe(false);172		expect((await get(`objects/${secret.hash}`)).status).toBe(404);173		const events = await (await get("events")).text();174		const strip = events175			.trim()176			.split("\n")177			.filter((id) => id.length > 0);178		expect(strip.length).toBeGreaterThan(0);179	});180});