37 lines
1.1 KiB
TypeScript
37 lines
1.1 KiB
TypeScript
/**
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* Test setup for `@suaveplan/delivery-tracking`.
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*
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* Installs a real in-memory OpenTelemetry `MeterProvider` BEFORE any
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* source module imports — `metrics.getMeter()` therefore binds to this
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* provider, so `flushTestMetrics()` returns the exact counter snapshots
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* the production code emitted.
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*/
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import { metrics } from "@opentelemetry/api";
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import {
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AggregationTemporality,
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InMemoryMetricExporter,
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MeterProvider,
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PeriodicExportingMetricReader,
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} from "@opentelemetry/sdk-metrics";
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export const testInMemoryMetricExporter = new InMemoryMetricExporter(
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AggregationTemporality.DELTA
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);
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const reader = new PeriodicExportingMetricReader({
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exporter: testInMemoryMetricExporter,
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exportIntervalMillis: 60_000,
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});
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export const testMeterProvider = new MeterProvider({ readers: [reader] });
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metrics.setGlobalMeterProvider(testMeterProvider);
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export async function flushTestMetrics(): Promise<
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ReturnType<typeof testInMemoryMetricExporter.getMetrics>
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> {
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await testMeterProvider.forceFlush();
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const collected = testInMemoryMetricExporter.getMetrics();
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testInMemoryMetricExporter.reset();
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return collected;
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}
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