Mongoose save方法test false pass with jest

const mongoose = require('mongoose');
const { MongoMemoryServer } = require('mongodb-memory-server');
const { Schema } = mongoose;

describe('Mongoose save方法测试', () => {
  let mongoServer;
  let TestModel;

  beforeAll(async () => {
    mongoServer = new MongoMemoryServer();
    const mongoUri = await mongoServer.getUri();

    await mongoose.connect(mongoUri, {
      useNewUrlParser: true,
      useUnifiedTopology: true,
    });

    const testSchema = new Schema({
      name: String,
    });

    TestModel = mongoose.model('Test', testSchema);
  });

  afterAll(async () => {
    await mongoose.disconnect();
    await mongoServer.stop();
  });

  it('保存数据到数据库', async () => {
    const testInstance = new TestModel({ name: 'Test' });
    const savedInstance = await testInstance.save();

    expect(savedInstance.name).toBe('Test');
  });
});