How to mock a property

[tetious]

Hi!

I'm a bit unsure how to go about mocking "new" syntax properties with the handy implicit get.

For example:

class_name Foo

var _bar: Bar

var prop: int:
    get: return _bar.something.else

How would I go about mocking the "call" to the implicit getter function assuming I mock Foo?

I've tried a couple things, such as:

var mock_foo : Foo = mock(Foo)

do_return(42).on(mock_foo).prop # meaningless, I think, seems to do nothing
do_return(42).on(mock_foo).get("prop") # does nothing?

It almost seems like this new syntax does not get mocked at all, as the underlying class's code is called...

The only path where I had success was to stop using the nice new syntax, like this:

# [...]
var prop: int: get = _get_prop

func _get_prop() -> int:
    return _bar.something.else

# [...]
do_return(42).on(mock_foo)._get_prop() # works!
do_return(42).on(mock_foo).get("prop") # also works! mysteriously...

I think the issue is that the new syntax is doing some magic that I don't understand.

Or perhaps it isn't implemented yet?

Thanks for any help/advice you have!

[MikeSchulze]

Hi, The get/set functional syntax is actual not supported to mock.

For your example

class_name Foo

var _bar: Bar

var prop: int:
    get: return _bar.something.else

There are two options to mock it.
a) mock class Bar and set the _bar value with the mocked instance in your class Foo
b) implement a custom getter function and mock this function
like you did in your example

func _get_prop() -> int:
  return _bar.something.else

I would prefer option a)