WIP: Bugfix/i578

[lxkarp]

The hope here is to resolve #578

I haven't done any cleanup as suggested by @bitwes over in the issue thread. But the fix he suggested works just fine, and this PR is evidence of that.

[lxkarp]

I think this may not correctly trigger is_action_just_pressed. I'll make another test to validate this tomorrow.

[Kulkodar]

Now i feel a little bit ashamed i could have submitted a pr but i didn't found the time. Thank you for taking the initiative, with these changes all my tests are working again. It seems that ´is_action_just_pressed´ is working.

[lxkarp]

I found that the problem with is_action_just_pressed -- for me at least -- is that it doesn't work in _process but it does work in _physics_process

[bitwes]

Thanks for the PR. The code change looks good. I'd like some additional testing to verify that the Input.is_action_just_* methods work as expected. If you change the InputSingletonTracker to the code below, you should be able to make assertions that they are working.

NOTE When I tried verifying that is_action_just_pressed was working I had to add a leading wait_frames for the InputSingletonTracker to detect the frame when the action goes down

_sender.wait_frames(1).action_down("jump").hold_for('10f')
await wait_for_signal(_sender.idle, 5)

Here's my take on InputSingletonTracker

class InputSingletonTracker:
	extends Node
	var pressed_frames = []
	var just_pressed_count = 0
	var just_released_count = 0

	var _frame_counter = 0

	func _process(delta):
		_frame_counter += 1

		if(Input.is_action_just_pressed("jump")):
			just_pressed_count += 1

		if(Input.is_action_just_released("jump")):
			just_released_count += 1

		if Input.is_action_pressed("jump"):
			pressed_frames.append(_frame_counter)

[bitwes]

Hey @lxkarp. @Edearth added the requested tests so I'm merging this PR for street cred, then I'll merge theirs. Thanks!