fatsify核心功能示例测试!!!

node_modules/fastify/docs/Reference/Lifecycle.md

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+<h1 align="center">Fastify</h1>
+
+## Lifecycle
+<a id="lifecycle"></a>
+
+This schema shows the internal lifecycle of Fastify.
+
+The right branch of each section shows the next phase of the lifecycle. The left
+branch shows the corresponding error code generated if the parent throws an
+error. All errors are automatically handled by Fastify.
+
+```
+Incoming Request
+  │
+  └─▶ Routing
+        │
+        └─▶ Instance Logger
+             │
+   4**/5** ◀─┴─▶ onRequest Hook
+                  │
+        4**/5** ◀─┴─▶ preParsing Hook
+                        │
+              4**/5** ◀─┴─▶ Parsing
+                             │
+                   4**/5** ◀─┴─▶ preValidation Hook
+                                  │
+                            400 ◀─┴─▶ Validation
+                                        │
+                              4**/5** ◀─┴─▶ preHandler Hook
+                                              │
+                                    4**/5** ◀─┴─▶ User Handler
+                                                    │
+                                                    └─▶ Reply
+                                                          │
+                                                4**/5** ◀─┴─▶ preSerialization Hook
+                                                                │
+                                                                └─▶ onSend Hook
+                                                                      │
+                                                            4**/5** ◀─┴─▶ Outgoing Response
+                                                                            │
+                                                                            └─▶ onResponse Hook
+```
+
+Before or during the `User Handler`, `reply.hijack()` can be called to:
+- Prevent Fastify from running subsequent hooks and the user handler
+- Prevent Fastify from sending the response automatically
+
+If `reply.raw` is used to send a response, `onResponse` hooks will still
+be executed.
+
+## Reply Lifecycle
+<a id="reply-lifecycle"></a>
+
+When the user handles the request, the result may be:
+
+- In an async handler: it returns a payload or throws an `Error`
+- In a sync handler: it sends a payload or an `Error` instance
+
+If the reply was hijacked, all subsequent steps are skipped. Otherwise, when
+submitted, the data flow is as follows:
+
+```
+                        ★ schema validation Error
+                                    │
+                                    └─▶ schemaErrorFormatter
+                                               │
+                          reply sent ◀── JSON ─┴─ Error instance
+                                                      │
+                                                      │         ★ throw an Error
+                     ★ send or return                 │                 │
+                            │                         │                 │
+                            │                         ▼                 │
+       reply sent ◀── JSON ─┴─ Error instance ──▶ onError Hook ◀───────┘
+                                                      │
+                                 reply sent ◀── JSON ─┴─ Error instance ──▶ setErrorHandler
+                                                                                │
+                                                                                └─▶ reply sent
+```
+
+`reply sent` means the JSON payload will be serialized by one of the following:
+- The [reply serializer](./Server.md#setreplyserializer) if set
+- The [serializer compiler](./Server.md#setserializercompiler) if a JSON schema
+  is set for the HTTP status code
+- The default `JSON.stringify` function