47 lines
1.9 KiB
TypeScript
47 lines
1.9 KiB
TypeScript
import { describe, expect, test } from "bun:test";
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import { createWebVitalsHandler, MetricsRegistry, webVitalsClient } from "../src/index.ts";
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describe("@wrnexus/observability", () => {
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test("aggregates browser vitals and flushes them once at page exit", () => {
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const client = webVitalsClient({ sampleRate: 1 });
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expect(client).toContain("var flushed = false");
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expect(client).toContain('addEventListener("pagehide", flush');
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expect(client).not.toContain('send("INP",max)');
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expect(client).not.toContain('send("LCP", last.startTime)');
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});
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test("records deterministic counters and histograms", () => {
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const registry = new MetricsRegistry(() => 123);
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registry.increment("requests", 1, { route: "/" });
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registry.increment("requests", 2, { route: "/" });
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registry.observe("duration", 10);
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registry.observe("duration", 20);
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expect(registry.snapshot()).toEqual(
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expect.arrayContaining([
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expect.objectContaining({ name: "requests", value: 3 }),
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expect.objectContaining({ name: "duration", value: 15, count: 2, min: 10, max: 20 }),
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]),
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);
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});
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test("accepts same-origin Web Vitals and rejects cross-site beacons", async () => {
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const handler = createWebVitalsHandler();
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const good = await handler(
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new Request("https://example.com/__wrnexus/metrics/vitals", {
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method: "POST",
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headers: { origin: "https://example.com", "content-type": "application/json" },
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body: JSON.stringify({ name: "LCP", value: 1200, route: "/" }),
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}),
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);
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expect(good.status).toBe(204);
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const denied = await handler(
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new Request("https://example.com/__wrnexus/metrics/vitals", {
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method: "POST",
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headers: { origin: "https://evil.example", "content-type": "application/json" },
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body: JSON.stringify({ name: "LCP", value: 1200 }),
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}),
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);
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expect(denied.status).toBe(403);
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});
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});
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