Projektstart

backend/node_modules/pino/test/diagnostics.test.js

@@ -0,0 +1,107 @@
+'use strict'
+
+const test = require('node:test')
+const os = require('node:os')
+const diagChan = require('node:diagnostics_channel')
+const { AsyncLocalStorage } = require('node:async_hooks')
+const { Writable } = require('node:stream')
+const tspl = require('@matteo.collina/tspl')
+const pino = require('../pino')
+
+const hostname = os.hostname()
+const { pid } = process
+const AS_JSON_START = 'tracing:pino_asJson:start'
+const AS_JSON_END = 'tracing:pino_asJson:end'
+
+// Skip tests if diagnostics_channel.tracingChannel is not available (Node < 18.19)
+const skip = typeof diagChan.tracingChannel !== 'function'
+
+test.beforeEach(ctx => {
+  ctx.pino = {
+    ts: 1757512800000, // 2025-09-10T10:00:00.000-05:00
+    now: Date.now
+  }
+
+  Date.now = () => ctx.pino.ts
+
+  ctx.pino.dest = new Writable({
+    objectMode: true,
+    write (data, enc, cb) {
+      cb()
+    }
+  })
+})
+
+test.afterEach(ctx => {
+  Date.now = ctx.pino.now
+})
+
+test('asJson emits events', { skip }, async (t) => {
+  const plan = tspl(t, { plan: 8 })
+  const { dest } = t.pino
+  const logger = pino({}, dest)
+  const expectedArguments = [
+    {},
+    'testing',
+    30,
+    `,"time":${t.pino.ts}`
+  ]
+
+  let startEvent
+  diagChan.subscribe(AS_JSON_START, startHandler)
+  diagChan.subscribe(AS_JSON_END, endHandler)
+
+  logger.info('testing')
+  await plan
+
+  diagChan.unsubscribe(AS_JSON_START, startHandler)
+  diagChan.unsubscribe(AS_JSON_END, endHandler)
+
+  function startHandler (event) {
+    startEvent = event
+    plan.equal(Object.prototype.toString.call(event.instance), '[object Pino]')
+    plan.equal(event.instance === logger, true)
+    plan.deepStrictEqual(Array.from(event.arguments ?? []), expectedArguments)
+  }
+
+  function endHandler (event) {
+    plan.equal(Object.prototype.toString.call(event.instance), '[object Pino]')
+    plan.equal(event.instance === logger, true)
+    plan.deepStrictEqual(Array.from(event.arguments ?? []), expectedArguments)
+    plan.equal(
+      event.result,
+      `{"level":30,"time":${t.pino.ts},"pid":${pid},"hostname":"${hostname}","msg":"testing"}\n`
+    )
+
+    plan.equal(event.arguments === startEvent.arguments, true, 'same event object is supplied to both events')
+  }
+})
+
+test('asJson context is not lost', { skip }, async (t) => {
+  const plan = tspl(t, { plan: 2 })
+  const { dest } = t.pino
+  const logger = pino({}, dest)
+  const asyncLocalStorage = new AsyncLocalStorage()
+  const localStore = { foo: 'bar' }
+
+  diagChan.subscribe(AS_JSON_START, startHandler)
+  diagChan.subscribe(AS_JSON_END, endHandler)
+
+  asyncLocalStorage.run(localStore, () => {
+    logger.info('testing')
+  })
+  await plan
+
+  diagChan.unsubscribe(AS_JSON_START, startHandler)
+  diagChan.unsubscribe(AS_JSON_END, endHandler)
+
+  function startHandler () {
+    const store = asyncLocalStorage.getStore()
+    plan.equal(store === localStore, true)
+  }
+
+  function endHandler () {
+    const store = asyncLocalStorage.getStore()
+    plan.equal(store === localStore, true)
+  }
+})