[swc-angular-plugin] Issue with inherited classes

[santiagof4]

Hello!

First of all, thanks a lot for the effort! This plugin has already incredible results in our huge project with more than 2000 tests.

The issue

When running our tests with plain Jest, everything works (but super slow 😉), but when running our tests with swc-angular this issue arises:

Looks like classes that extend from other class lose values of those properties that are not present in the parent class.

Example:

interface IModelBase {
  id?: string;
  name: string;
}

class ModelBase implements IModelBase {
  id?: string;
  name: string;

  constructor(model: Partial<IModelBase>) {
    Object.assign(this, model);
  }
}

interface IModel {
  version: number;
}

export class Model extends ModelBase implements IModel {
  version: number;

  constructor(model: Partial<IModel & IModelBase>) {
    super(model);
  }
}

When testing something with that class, version is always undefined:

import { Model } from './model';

describe("failing class tests", () => {
  it('should init class with all the values', () => {
    const model = new Model({ id: '123', name: 'test', version: 1 });

    expect(model.id).toEqual('123');
    expect(model.name).toEqual('test');
    expect(model.version).toEqual(1); // This fails, 'version' is undefined
  })
})

This also works with Jasmine and in normal runtime.

Reproduction

https://github.com/santiagof4/jest-angular-swc-class-reproduction

1. clone package
2. npm install
3. nx test
4. Test in https://github.com/santiagof4/jest-angular-swc-class-reproduction/blob/main/src/app/failing-test.spec.ts fails.