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test(node): Fix flaky TypeSafe ESM integration tests #24912

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test(node): Fix flaky TypeSafe ESM integration tests #24912

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11 changes: 11 additions & 0 deletions dev-packages/node-integration-tests/suites/tracing/typesafe/scenario.mjs
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
import * as Sentry from '@sentry/node';
import { choice, noul, score, TypeSafeClient } from '@typesafe-ai/sdk';
import express from 'express';
import { tracingChannel } from 'node:diagnostics_channel';

function startMockServer() {
const app = express();
Expand Down Expand Up @@ -41,7 +42,17 @@ function startMockServer() {
});
}

// On Node < 24.13 the ESM build is transformed on the `Module.register` loader thread, which reports the
// injection back over a `MessagePort`, so the integration may subscribe only after this module starts running.
async function waitForSubscription() {
const channel = tracingChannel('orchestrion:@typesafe-ai/sdk:system-one');
while (!channel.start.hasSubscribers) {
await new Promise(resolve => setTimeout(resolve, 10));
}
}

async function run() {
await waitForSubscription();
const server = await startMockServer();
const client = new TypeSafeClient({
apiKey: 'mock-api-key',
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