mock().using does not work on method nested inside class property [@automock]

[tsahnar]

Is there an existing issue for this?

• I have searched the existing issues

Current behavior

We are encountering difficulties when attempting to mock methods that are defined inside existing class properties. The nested property is automatically overwritten with a mocked object, so the actual method inside the property we need to mock is undefined and cannot be accessed (and cannot be mocked, basically).

Steps to reproduce

1. Define a class with a property that contains a method. e.g.:

class OtherClass {
   public  getSomething: () => string
}

class MyClass {
    readonly property: OtherClass
}

2. . Attempt to mock MyClass

let myClass:  jest.Mocked<MyClass>;

const { unit, unitRef } = TestBed.create(ServiceUnderTest)
      .mock(MyClass)
      .using({
         property: {
               getSomething: jest.fn()
          }
       })
 .compile();

myClass = unitRef.get(MyClass)

3. In the actual test try to mock resolved value getSomething, e.g:

myClass.property.getSomething.mockResolvedValue('mocked')

Expected behavior

The method inside the class property should be successfully mocked. In the above example trying to do
.getSomething.mockResolvedValue Should not throw an error - getSomething is undefined

Automock version

v2.1.0