fatsify核心功能示例测试!!!

node_modules/fastify/test/diagnostics-channel/error-before-handler.test.js

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+'use strict'
+
+const diagnostics = require('node:diagnostics_channel')
+const { test } = require('node:test')
+require('../../lib/hooks').onSendHookRunner = function Stub () {}
+const Request = require('../../lib/request')
+const Reply = require('../../lib/reply')
+const symbols = require('../../lib/symbols.js')
+const { preHandlerCallback } = require('../../lib/handleRequest')[Symbol.for('internals')]
+
+test('diagnostics channel handles an error before calling context handler', t => {
+  t.plan(3)
+  let callOrder = 0
+
+  diagnostics.subscribe('tracing:fastify.request.handler:start', (msg) => {
+    t.assert.strictEqual(callOrder++, 0)
+  })
+
+  diagnostics.subscribe('tracing:fastify.request.handler:error', (msg) => {
+    t.assert.strictEqual(callOrder++, 1)
+    t.assert.strictEqual(msg.error.message, 'oh no')
+  })
+
+  const error = new Error('oh no')
+  const request = new Request()
+  const reply = new Reply({}, request)
+  request[symbols.kRouteContext] = {
+    config: {
+      url: '/foo',
+      method: 'GET'
+    }
+  }
+
+  preHandlerCallback(error, request, reply)
+})