Jest toMatchObject 与 MongoDB 混淆

Question

我对我的猫鼬模型进行了测试，虽然一个模型的测试运行完全正常，但另一个基本上是复制品的测试 - 不起作用。老实说，我不明白这个问题。我试图删除一些属性或添加硬编码值以真正匹配 100% - 但不知何故我总是得到类似的错误。

错误。让我发疯的是我试图删除/添加“_id”和“createdOn”字段，但至少“_id”总是出现在错误中。如上所述，在另一个模型中，测试不会抱怨“_id”，因为我没有在那里验证它......我只是不明白。

insert › Should save a channel

expect(received).toMatchObject(expected)

- Expected  - 1
+ Received  + 2

@@ -1,8 +1,9 @@
  Object {
+   "_id": "5e962f1dc133d8b92891ddaf",
    "createdBy": "5e962f1dc133d8b92891ddae",
-   "createdOn": Anything,
+   "createdOn": 2020-04-14T21:46:05.907Z,
    "hasAcceptedLegal": false,
    "isActive": true,
    "isPublic": false,
    "members": Array [
      "5e962f1dc133d8b92891ddae",

  48 |     expect(spy).toHaveBeenCalled();
  49 | 
> 50 |     expect(channel).toMatchObject({
     |                     ^
  51 |       name: mockName,
  52 |       createdBy: mockCreatedById,
  53 |       createdOn: expect.anything(),

  at Object.it (test/model/channel.model.test.ts:50:21)

各自的模型

import mongoose, { Schema, Document } from "mongoose";
import { IUser } from "./user.model";

export interface IChannel extends Document {
  name: string;
  createdBy: IUser["id"];
  createdOn: Date;
  isActive: boolean;
  isPublic: boolean;
  hasAcceptedLegal: boolean;
  members: [IUser["id"]];
}

const ChannelSchema: Schema = new Schema({
  name: { type: String, required: true },
  createdBy: {
    type: Schema.Types.ObjectId,
    ref: "User",
    required: true,
  },
  createdOn: { type: Date },
  isActive: { type: Boolean, default: true },
  isPublic: { type: Boolean, default: false },
  hasAcceptedLegal: { type: Boolean, default: false },
  members: [
    {
      type: Schema.Types.ObjectId,
      ref: "User",
      required: true,
    },
  ],
});

export default mongoose.model<IChannel>("Channel", ChannelSchema);

测试：

it("Should save a channel", async () => {
    expect.assertions(2);
    let mockName = Faker.company.companyName();
    let mockCreatedById = Types.ObjectId();
    let mockCreatedOn = Date.now();

    const channel: IChannel = new Channel({
      name: mockName,
      createdBy: mockCreatedById,
      createdOn: mockCreatedOn,
      members: [mockCreatedById],
    });
    const spy = jest.spyOn(channel, "save");
    channel.save();

    expect(spy).toHaveBeenCalled();

    expect(channel).toMatchObject({
      name: mockName,
      createdBy: mockCreatedById,
      createdOn: expect.anything(),
      isActive: true,
      isPublic: false,
      hasAcceptedLegal: false,
      members: [mockCreatedById],
    });
  });

Answer 1

仅供参考，我发现了某事。返回的 mongoose 对象应该用“.toJSON()”转换，然后它可以工作，但即使这样，“createdOn”字段也有问题，因为它似乎是格式化的日期或某事。像这样（没有字符串，缺少括号）。 我现在终于做了以下事情，现在它可以工作了：

it("Should save a channel (required+defaults)", async () => {
    expect.assertions(2);
    let mockName = Faker.company.companyName();
    let mockCreatedById = Types.ObjectId();
    let mockCreatedOn = new Date();

    const channel: IChannel = new Channel({
      name: mockName,
      createdBy: mockCreatedById,
      createdOn: mockCreatedOn,
      members: [mockCreatedById],
    });
    const spy = jest.spyOn(channel, "save");
    channel.save();

    expect(spy).toHaveBeenCalled();

    expect(channel.toJSON()).toMatchObject({
      _id: expect.anything(),
      name: mockName,
      createdBy: mockCreatedById,
      createdOn: expect.anything(),
      isActive: true,
      isPublic: false,
      hasAcceptedLegal: false,
      members: expect.arrayContaining([mockCreatedById]),
    });
  });