为啥 Jest 在测试“Colyseus”游戏时会出现这个错误？

Posted 2023-02-16

【中文标题】为啥 Jest 在测试“Colyseus”游戏时会出现这个错误？

【英文标题】：Why does Jest rise this error while testing `Colyseus` game?为什么 Jest 在测试“Colyseus”游戏时会出现这个错误？

【发布时间】：2021-11-03 14:23:19

【问题描述】：

我正在使用Jest 作为测试框架和断言库来测试游戏功能。 这是我的测试设置：

const  Server  = require("colyseus")
const  ColyseusTestServer, boot  = require("@colyseus/testing");
const Game = require("./index");

describe("Game", () => 
    let colyseus;
    let TestServer = new Server()
    TestServer.define("my_game", Game)
    const User_1 = 
        key: "token_header.token_payload.and_oh"
    
    beforeAll(async () => colyseus = await boot(TestServer));
    afterAll(async () => await colyseus.shutdown());
    beforeEach(async () => await colyseus.cleanup());

    test("Should connect", async () => 
        try 
         // `room` is the server-side Room instance reference.
         const room = await colyseus.sdk.joinOrCreate("my_game", ...User_1);

         await room.waitForNextPatch();
         await room.waitForNextMessage();

         // `client1` is the client-side `Room` instance reference (same as javascript SDK)
     
         // make your assertions
         expect(room.sessionId).toEqual(room.clients[0].sessionId);
         catch(err) 
            console.log("errr",err)
        
    )
)

所以每次我运行测试时Jest 都会记录这些errors：

Game
    ✕ Should connect (8003 ms)

  ● Game › Should connect

    TypeError: decode[type] is not a function

      at decodePrimitiveType (node_modules/@colyseus/schema/src/Schema.ts:109:34)
      at _.Object.<anonymous>.Schema.decode (node_modules/@colyseus/schema/src/Schema.ts:352:25)
      at SchemaSerializer.Object.<anonymous>.SchemaSerializer.setState (node_modules/colyseus.js/src/serializer/SchemaSerializer.ts:10:20)
      at Room.Object.<anonymous>.Room.setState (node_modules/colyseus.js/src/Room.ts:225:25)
      at Room.Object.<anonymous>.Room.onMessageCallback (node_modules/colyseus.js/src/Room.ts:203:18)
      at WebSocket.onMessage (node_modules/ws/lib/event-target.js:132:16)
      at Receiver.receiverOnMessage (node_modules/ws/lib/websocket.js:983:20)
      at Receiver.dataMessage (node_modules/ws/lib/receiver.js:502:14)
      at Receiver.getData (node_modules/ws/lib/receiver.js:435:17)
      at Receiver.startLoop (node_modules/ws/lib/receiver.js:143:22)
      at Receiver._write (node_modules/ws/lib/receiver.js:78:10)
      at Socket.socketOnData (node_modules/ws/lib/websocket.js:1077:35)

  ● Game › Should connect

    thrown: "Exceeded timeout of 5000 ms for a test.
    Use jest.setTimeout(newTimeout) to increase the timeout value, if this is a long-running test."

      18 |     beforeEach(async () => await colyseus.cleanup());
      19 |     jest.setTimeout(8000)
    > 20 |     test("Should connect", async () => 
         |     ^
      21 |         try 
      22 |             // `room` is the server-side Room instance reference.
      23 |         const room = await colyseus.sdk.joinOrCreate("my_game", ...User_1);

      at server/test.js:20:5
      at Object.<anonymous> (server/test.js:7:1)
      at TestScheduler.scheduleTests (node_modules/@jest/core/build/TestScheduler.js:333:13)
      at runJest (node_modules/@jest/core/build/runJest.js:401:19)
      at _run10000 (node_modules/@jest/core/build/cli/index.js:320:7)
      at runCLI (node_modules/@jest/core/build/cli/index.js:173:3)

我将timeouts 更改为Jest，但没有任何改变。

这些是我正在使用的 Colyseus、Jest 和 Node.js 的版本：

"@colyseus/schema": "^1.0.28",
"@colyseus/testing": "^0.14.22",
"colyseus": "^0.14.18",
"jest": "^27.3.1"

node: v14.7

【参考方案1】：

此问题是由于已添加到框架的最新版本中的 colyseus 游戏框架的同步 state 的 schema 的未确定字段类型。所以我只是将类型定义为playerId: [string] 并且它解决了没有任何错误。