Timothy J. Aveni
35 lines
1.5 KiB
TypeScript
35 lines
1.5 KiB
TypeScript
import test from "node:test";
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import assert from "node:assert/strict";
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import {mkdtemp, rm} from "node:fs/promises";
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import path from "node:path";
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import os from "node:os";
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import {spawn} from "node:child_process";
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import {once} from "node:events";
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import {withFileLock} from "../src/capability-language/file-lock.js";
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test("authoring lock excludes concurrent mutations and survives owner death", async context => {
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const root = await mkdtemp(path.join(os.tmpdir(), "qx-lock-test-"));
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context.after(() => rm(root, {recursive: true, force: true}));
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const filename = path.join(root, "lock");
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const events: string[] = [];
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let queued: Promise<void>;
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await withFileLock(filename, async () => {
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queued = withFileLock(filename, async () => {events.push("second");});
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events.push("first");
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});
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await queued!;
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assert.deepEqual(events, ["first", "second"]);
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const module = new URL("../src/capability-language/file-lock.js", import.meta.url).href;
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const owner = spawn(process.execPath, ["--input-type=module", "-e",
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`import {withFileLock} from ${JSON.stringify(module)}; await withFileLock(${JSON.stringify(filename)}, async () => {process.stdout.write('ready'); await new Promise(() => {});});`],
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{stdio: ["ignore", "pipe", "pipe"]});
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context.after(() => owner.kill("SIGKILL"));
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await once(owner.stdout, "data");
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const exited = once(owner, "exit");
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owner.kill("SIGKILL");
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await exited;
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let acquired = false;
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await withFileLock(filename, async () => {acquired = true;});
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assert.equal(acquired, true);
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});
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