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fb4d8fe | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 | import { spawn } from "node:child_process";
import net from "node:net";
import path from "node:path";
import process from "node:process";
import { afterEach, describe, expect, it } from "vitest";
import { attachChildProcessBridge } from "./child-process-bridge.js";
function waitForLine(stream: NodeJS.ReadableStream, timeoutMs = 10_000): Promise<string> {
return new Promise((resolve, reject) => {
let buffer = "";
const timeout = setTimeout(() => {
cleanup();
reject(new Error("timeout waiting for line"));
}, timeoutMs);
const onData = (chunk: Buffer | string): void => {
buffer += chunk.toString();
const idx = buffer.indexOf("\n");
if (idx >= 0) {
const line = buffer.slice(0, idx).trim();
cleanup();
resolve(line);
}
};
const onError = (err: unknown): void => {
cleanup();
reject(err);
};
const cleanup = (): void => {
clearTimeout(timeout);
stream.off("data", onData);
stream.off("error", onError);
};
stream.on("data", onData);
stream.on("error", onError);
});
}
function canConnect(port: number): Promise<boolean> {
return new Promise((resolve) => {
const socket = net.createConnection({ host: "127.0.0.1", port });
socket.once("connect", () => {
socket.end();
resolve(true);
});
socket.once("error", () => resolve(false));
});
}
describe("attachChildProcessBridge", () => {
const children: Array<{ kill: (signal?: NodeJS.Signals) => boolean }> = [];
const detachments: Array<() => void> = [];
afterEach(() => {
for (const detach of detachments) {
try {
detach();
} catch {
// ignore
}
}
detachments.length = 0;
for (const child of children) {
try {
child.kill("SIGKILL");
} catch {
// ignore
}
}
children.length = 0;
});
it("forwards SIGTERM to the wrapped child", async () => {
const childPath = path.resolve(process.cwd(), "test/fixtures/child-process-bridge/child.js");
const beforeSigterm = new Set(process.listeners("SIGTERM"));
const child = spawn(process.execPath, [childPath], {
stdio: ["ignore", "pipe", "inherit"],
env: process.env,
});
const { detach } = attachChildProcessBridge(child);
detachments.push(detach);
children.push(child);
const afterSigterm = process.listeners("SIGTERM");
const addedSigterm = afterSigterm.find((listener) => !beforeSigterm.has(listener));
if (!child.stdout) {
throw new Error("expected stdout");
}
const portLine = await waitForLine(child.stdout);
const port = Number(portLine);
expect(Number.isFinite(port)).toBe(true);
expect(await canConnect(port)).toBe(true);
// Simulate systemd sending SIGTERM to the parent process.
if (!addedSigterm) {
throw new Error("expected SIGTERM listener");
}
addedSigterm();
await new Promise<void>((resolve, reject) => {
const timeout = setTimeout(() => reject(new Error("timeout waiting for child exit")), 10_000);
child.once("exit", () => {
clearTimeout(timeout);
resolve();
});
});
await new Promise((r) => setTimeout(r, 250));
expect(await canConnect(port)).toBe(false);
}, 20_000);
});
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