lostviolinist
57fc2d4617
* fix(test): wait for valid debugger fixture PIDs * test(process): cover delayed and invalid PID publication * test(process): share validated PID file readiness
26 lines
809 B
TypeScript
26 lines
809 B
TypeScript
import { readFile } from "node:fs/promises";
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import { setTimeout as delay } from "node:timers/promises";
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/** Wait for a fixture's PID bytes, not merely the creation of its file. */
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export const waitForTestPidFile = async (
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path: string,
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timeoutMs: number,
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): Promise<number> => {
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const deadline = performance.now() + timeoutMs;
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do {
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let text = "";
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try {
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text = await readFile(path, "utf8");
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} catch (cause) {
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if (
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!(cause instanceof Error && "code" in cause && cause.code === "ENOENT")
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)
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throw cause;
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}
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const pid = Number(text);
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if (/^[1-9][0-9]*$/.test(text) && Number.isSafeInteger(pid)) return pid;
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await delay(10);
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} while (performance.now() < deadline);
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throw new Error(`Test process did not publish a valid PID in ${path}`);
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};
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