fatsify核心功能示例测试!!!

node_modules/fastify/test/diagnostics-channel/init.test.js

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+'use strict'
+
+const { test } = require('node:test')
+const proxyquire = require('proxyquire')
+
+test('diagnostics_channel when present and subscribers', t => {
+  t.plan(3)
+
+  let fastifyInHook
+
+  const diagnostics = {
+    channel (name) {
+      t.assert.strictEqual(name, 'fastify.initialization')
+      return {
+        hasSubscribers: true,
+        publish (event) {
+          t.assert.ok(event.fastify)
+          fastifyInHook = event.fastify
+        }
+      }
+    },
+    '@noCallThru': true
+  }
+
+  const fastify = proxyquire('../../fastify', {
+    'node:diagnostics_channel': diagnostics
+  })()
+  t.assert.strictEqual(fastifyInHook, fastify)
+})
+
+test('diagnostics_channel when present and no subscribers', t => {
+  t.plan(1)
+
+  const diagnostics = {
+    channel (name) {
+      t.assert.strictEqual(name, 'fastify.initialization')
+      return {
+        hasSubscribers: false,
+        publish () {
+          t.assert.fail('publish should not be called')
+        }
+      }
+    },
+    '@noCallThru': true
+  }
+
+  proxyquire('../../fastify', {
+    'node:diagnostics_channel': diagnostics
+  })()
+})