如何用玩笑修复MissingSchemaError

Question

我正在尝试使用Jest库编写一些测试。但是出现错误-

MissingSchemaError: Schema hasn't been registered for model "Todo".
 Use mongoose.model(name, schema)

    > 1 | const Todo = require('mongoose').model('Todo');
        |                                  ^
      2 | // const Todo =
      3 | 
      4 | exports.create = todo => {

      at new MissingSchemaError (node_modules/mongoose/lib/error/missingSchema.js:22:11)

我已经使用 postman 对其代码进行了测试。

Github存储库 https://github.com/arpit-absyadav/todo_app