serverless-spy/lib/listener/WsListener.mjs.map

CDK-based library for writing elegant integration tests on AWS serverless architecture and an additional web console to monitor events in real time.

{"version":3,"file":"WsListener.mjs","names":["message: SpyMessageStorage | undefined","data","spyAndJestMatchers: any","resolve: (value: void | PromiseLike<any>) => void","tracker: Tracker","timeoutPid: NodeJS.Timeout | undefined"],"sources":["../../listener/WsListener.ts"],"sourcesContent":["import { device } from 'aws-iot-device-sdk';\nimport { fragment, getConnection } from './iot-connection';\nimport { ServerlessSpyListener } from './ServerlessSpyListener';\nimport { ServerlessSpyListenerParams } from './ServerlessSpyListenerParams';\nimport { getTopic } from './topic';\nimport { WaitForParams } from './WaitForParams';\nimport { FunctionRequestSpyEvent } from '../common/spyEvents/FunctionRequestSpyEvent';\nimport { SpyMessage } from '../common/spyEvents/SpyMessage';\n\nexport class WsListener<TSpyEvents> {\n  private messages: SpyMessageStorage[] = [];\n  private trackers: Tracker[] = [];\n\n  private connectionOpenResolve?: () => void;\n  private connectionOpenReject?: (reason?: any) => void;\n  private closed = true;\n  private functionPrefix = 'waitFor';\n  private debugMode = false;\n  private connection: device | undefined;\n\n  private fragments = new Map<string, Map<number, fragment>>();\n\n  public async start(params: ServerlessSpyListenerParams) {\n    this.debugMode = !!params.debugMode;\n    try {\n      this.connection = await getConnection(\n        this.debugMode,\n        params.serverlessSpyWsUrl\n      );\n      this.closed = false;\n      const topic = getTopic(params.scope || '#');\n      this.log(`Subscribing to topic ${topic}`);\n      const connectionOpenResolve =\n        this.connectionOpenResolve || params.connectionOpenResolve;\n      const localConnection = this.connection;\n      this.connection.on('connect', () => {\n        this.closed = false;\n        this.log('Connection opened');\n        localConnection.subscribe(topic);\n        if (connectionOpenResolve) {\n          connectionOpenResolve();\n        }\n      });\n      this.connection.on('message', (_topic: string, data: Buffer) => {\n        if (this.closed) return;\n\n        this.log('Message received', data.toString());\n        const fragment = JSON.parse(data.toString());\n        let message: SpyMessageStorage | undefined = undefined;\n        if (!fragment.id) {\n          message = JSON.parse(fragment.data) as SpyMessageStorage;\n        }\n\n        let pending = this.fragments.get(fragment.id);\n        if (!pending) {\n          pending = new Map();\n          this.fragments.set(fragment.id, pending);\n        }\n        pending.set(fragment.index, fragment);\n\n        if (pending.size === fragment.count) {\n          const data = [...pending.values()]\n            .sort((a, b) => a.index - b.index)\n            .map((item) => item.data)\n            .join('');\n          this.fragments.delete(fragment.id);\n          message = JSON.parse(data) as SpyMessageStorage;\n        }\n\n        if (message) {\n          message.serviceKeyForFunction = message.serviceKey.replace(/#/g, '');\n\n          if (message.serviceKey.startsWith('Function')) {\n            message.functionContextAwsRequestId = (\n              message.data as FunctionRequestSpyEvent\n            ).context.awsRequestId;\n          }\n\n          this.messages.push(message);\n          this.resolveOldTrackerWithNewMessage(message);\n        }\n      });\n      this.connection.on('close', () => {\n        this.log('Connection closed');\n\n        this.closed = true;\n      });\n\n      const connectionOpenReject =\n        this.connectionOpenReject || params.connectionOpenReject;\n      this.connection.on('error', (error) => {\n        this.log('Connection error:', error);\n        connectionOpenReject?.(error);\n      });\n    } catch (e) {\n      console.error('Failed to get connection', e);\n      throw e;\n    }\n  }\n\n  public async stop() {\n    this.closed = true;\n    this.connection!.end(true);\n  }\n\n  private trackerMatchMessage(tracker: Tracker, message: SpyMessageStorage) {\n    if (tracker.finished) return;\n\n    if (\n      (tracker.serviceKey && tracker.serviceKey === message.serviceKey) ||\n      (tracker.serviceKeyForFunction &&\n        tracker.serviceKeyForFunction === message.serviceKeyForFunction)\n    ) {\n      if (this.trackerMatchCondition(tracker, message)) {\n        tracker.finished = true;\n\n        const spyAndJestMatchers: any = {\n          getData: () => message.data,\n        };\n\n        const serviceKeyForFunction = tracker.serviceKeyForFunction;\n        if (\n          serviceKeyForFunction &&\n          serviceKeyForFunction.startsWith('Function') &&\n          (serviceKeyForFunction.endsWith('Request') ||\n            serviceKeyForFunction.endsWith('Console'))\n        ) {\n          let serviceKeyForFunctionChain = serviceKeyForFunction;\n\n          if (serviceKeyForFunctionChain.endsWith('Request')) {\n            serviceKeyForFunctionChain = serviceKeyForFunctionChain.substring(\n              0,\n              serviceKeyForFunctionChain.length - 'Request'.length\n            );\n          } else if (serviceKeyForFunctionChain.endsWith('Console')) {\n            serviceKeyForFunctionChain = serviceKeyForFunctionChain.substring(\n              0,\n              serviceKeyForFunctionChain.length - 'Console'.length\n            );\n          }\n\n          spyAndJestMatchers.followedByConsole = (paramsW: WaitForParams) => {\n            return this.createWaitForXXXFunc(\n              `${serviceKeyForFunctionChain}Console`,\n              (message.data as FunctionRequestSpyEvent).context.awsRequestId\n            )(paramsW);\n          };\n\n          spyAndJestMatchers.followedByResponse = (paramsW: WaitForParams) => {\n            return this.createWaitForXXXFunc(\n              `${serviceKeyForFunctionChain}Response`,\n              (message.data as FunctionRequestSpyEvent).context.awsRequestId\n            )(paramsW);\n          };\n        }\n\n        const proxy = new Proxy(spyAndJestMatchers, {\n          get: function (target: any, objectKey: string) {\n            if (target.hasOwnProperty(objectKey)) {\n              return target[objectKey];\n            } else if (objectKey !== 'then') {\n              return function () {\n                const jestFunctionToExecute = (expect(message.data) as any)[\n                  objectKey\n                ];\n                jestFunctionToExecute.apply(undefined, arguments);\n                return proxy;\n              };\n            }\n          },\n        });\n\n        tracker.promiseResolve(proxy);\n        return true;\n      }\n    }\n    return false;\n  }\n\n  private resolveTrackerInOldMessages(tracker: Tracker) {\n    for (const message of this.messages) {\n      if (this.trackerMatchMessage(tracker, message)) {\n        return true;\n      }\n    }\n\n    return false;\n  }\n\n  private resolveOldTrackerWithNewMessage(message: SpyMessageStorage) {\n    for (let index = 0; index < this.trackers.length; index++) {\n      const tracker = this.trackers[index];\n      if (this.trackerMatchMessage(tracker, message)) {\n        this.trackers = this.trackers.splice(index, 1);\n        return true;\n      }\n    }\n\n    return false;\n  }\n\n  private trackerMatchCondition(tracker: Tracker, message: SpyMessageStorage) {\n    const matchCondition =\n      (tracker.condition && tracker.condition(message.data)) ||\n      !tracker.condition;\n\n    const matchRequestId =\n      (tracker.functionContextAwsRequestId &&\n        tracker.functionContextAwsRequestId ===\n          message.functionContextAwsRequestId) ||\n      !tracker.functionContextAwsRequestId;\n\n    if (matchCondition && matchRequestId) {\n      return true;\n    } else {\n      if (\n        !matchCondition &&\n        matchRequestId &&\n        !tracker.possibleSpyMessageDataForDebugging\n      ) {\n        tracker.possibleSpyMessageDataForDebugging = message.data;\n      }\n      return false;\n    }\n  }\n\n  private createWaitForXXXFunc(\n    serviceKeyForFunction: string,\n    functionContextAwsRequestId?: string\n  ) {\n    return (paramsW?: WaitForParams) => {\n      let resolve: (value: void | PromiseLike<any>) => void;\n      const promise = new Promise((res) => {\n        resolve = res;\n      });\n      const tracker: Tracker = {\n        finished: false,\n        // @ts-ignore\n        promiseResolve: resolve,\n        serviceKeyForFunction,\n        functionContextAwsRequestId,\n      };\n\n      tracker.condition = paramsW?.condition;\n\n      let timeoutPid: NodeJS.Timeout | undefined;\n      const timer = new Promise((_, reject) => {\n        timeoutPid = setTimeout(() => {\n          if (tracker.finished) return;\n          tracker.finished = true;\n          let message = `Timeout waiting for Serverless Spy message ${serviceKeyForFunction}.`;\n\n          if (tracker.possibleSpyMessageDataForDebugging) {\n            message += ` Similar matching spy event data: ${JSON.stringify(\n              tracker.possibleSpyMessageDataForDebugging,\n              null,\n              2\n            )}`;\n          }\n\n          reject(new Error(message));\n        }, paramsW?.timoutMs || 10000);\n      });\n\n      if (!this.resolveTrackerInOldMessages(tracker)) {\n        this.trackers.push(tracker);\n      }\n\n      return Promise.race([promise, timer]).finally(() => {\n        if (!!timeoutPid) {\n          clearTimeout(timeoutPid);\n        }\n      });\n    };\n  }\n\n  public createProxy() {\n    const spyListener = {} as ServerlessSpyListener<TSpyEvents>;\n\n    spyListener.stop = async () => {\n      await this.stop();\n    };\n\n    return new Proxy<ServerlessSpyListener<TSpyEvents>>(spyListener, {\n      get: (target: any, objectKey: string) => {\n        if (target.hasOwnProperty(objectKey)) {\n          return target[objectKey].bind(target);\n        } else if (\n          typeof objectKey === 'string' &&\n          objectKey.startsWith(this.functionPrefix)\n        ) {\n          const serviceKeyForFunction = objectKey.substring(\n            this.functionPrefix.length\n          );\n\n          return this.createWaitForXXXFunc(serviceKeyForFunction);\n        }\n      },\n    });\n  }\n\n  private log(message: string, ...optionalParams: any[]) {\n    if (this.debugMode && !this.closed) {\n      console.debug(\n        'SSPY',\n        message,\n        new Date().toISOString(),\n        ...optionalParams\n      );\n    }\n  }\n}\n\ntype Tracker = {\n  promiseResolve: (data: any) => void;\n  finished: boolean;\n  serviceKey?: string;\n  serviceKeyForFunction?: string;\n  condition?: (data: any) => boolean;\n  timoutMs?: number;\n  functionContextAwsRequestId?: string;\n  possibleSpyMessageDataForDebugging?: any;\n};\n\ntype SpyMessageStorage = SpyMessage & {\n  serviceKeyForFunction: string;\n  functionContextAwsRequestId?: 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