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'use strict' const diagnostics = require('node:diagnostics_channel') const { test } = require('node:test') const Fastify = require('../..') const Request = require('../../lib/request') const Reply = require('../../lib/reply') test('diagnostics channel async events fire in expected order', async t => { t.plan(19) let callOrder = 0 let firstEncounteredMessage diagnostics.subscribe('tracing:fastify.request.handler:start', (msg) => { t.assert.strictEqual(callOrder++, 0) firstEncounteredMessage = msg t.assert.ok(msg.request instanceof Request) t.assert.ok(msg.reply instanceof Reply) }) diagnostics.subscribe('tracing:fastify.request.handler:end', (msg) => { t.assert.strictEqual(callOrder++, 1) t.assert.ok(msg.request instanceof Request) t.assert.ok(msg.reply instanceof Reply) t.assert.strictEqual(msg, firstEncounteredMessage) t.assert.strictEqual(msg.async, true) }) diagnostics.subscribe('tracing:fastify.request.handler:asyncStart', (msg) => { t.assert.strictEqual(callOrder++, 2) t.assert.ok(msg.request instanceof Request) t.assert.ok(msg.reply instanceof Reply) t.assert.strictEqual(msg, firstEncounteredMessage) }) diagnostics.subscribe('tracing:fastify.request.handler:asyncEnd', (msg) => { t.assert.strictEqual(callOrder++, 3) t.assert.ok(msg.request instanceof Request) t.assert.ok(msg.reply instanceof Reply) t.assert.strictEqual(msg, firstEncounteredMessage) }) diagnostics.subscribe('tracing:fastify.request.handler:error', (msg) => { t.assert.fail('should not trigger error channel') }) const fastify = Fastify() fastify.route({ method: 'GET', url: '/', handler: async function (req, reply) { setImmediate(() => reply.send({ hello: 'world' })) return reply } }) t.after(() => { fastify.close() }) const fastifyServer = await fastify.listen({ port: 0 }) const result = await fetch(fastifyServer + '/') t.assert.ok(result.ok) t.assert.strictEqual(result.status, 200) t.assert.deepStrictEqual(await result.json(), { hello: 'world' }) })