Initial Commit

packages/devtools/tooling/electrobun/tests/setup/polyfills.ts

@@ -0,0 +1,34 @@
+/**
+ * Test setup for @suaveplan/electrobun.
+ *
+ * Registers a real in-memory OpenTelemetry MeterProvider BEFORE source
+ * modules import so the global meter resolved on first use binds to it.
+ * The electrobun package is server-tier and uses node:fs / node:child_process —
+ * no DOM shims required.
+ */
+import { metrics } from "@opentelemetry/api";
+import {
+    AggregationTemporality,
+    InMemoryMetricExporter,
+    MeterProvider,
+    PeriodicExportingMetricReader,
+} from "@opentelemetry/sdk-metrics";
+
+export const testInMemoryMetricExporter = new InMemoryMetricExporter(
+    AggregationTemporality.CUMULATIVE
+);
+
+const reader = new PeriodicExportingMetricReader({
+    exporter: testInMemoryMetricExporter,
+    exportIntervalMillis: 60_000,
+});
+
+export const testMeterProvider = new MeterProvider({ readers: [reader] });
+metrics.setGlobalMeterProvider(testMeterProvider);
+
+export async function flushTestMetrics() {
+    await testMeterProvider.forceFlush();
+    const collected = testInMemoryMetricExporter.getMetrics();
+    testInMemoryMetricExporter.reset();
+    return collected;
+}