Function connectWebSocketFromServer

playground/fs-serve/__tests__/commonTests.ts:372–397

(
    url: string,
    host: string,
    origin: string | undefined,
  )

  }

  const connectWebSocketFromServer = async (
    url: string,
    host: string,
    origin: string | undefined,
  ) => {
    try {
      const ws = new WebSocket(url, ['vite-hmr'], {
        headers: {
          Host: host,
          ...(origin ? { Origin: origin } : undefined),
        },
      })
      await new Promise<void>((resolve, reject) => {
        ws.addEventListener('open', () => {
          resolve()
          ws.close()
        })
        ws.addEventListener('error', () => {
          reject()
        })
      })
      return true
    } catch {
      return false
    }
  }

  describe('allowed for same origin', () => {
    beforeEach(async () => {