John McCardle
a77ac6c501
McRogueFace needs to accept callable objects (properties on C++ objects) and also support subclassing (getattr on user objects). Only direct properties were supported previously, now shadowing a callback by name will allow custom objects to "just work". - Added CallbackCache struct and is_python_subclass flag to UIDrawable.h - Created metaclass for tracking class-level callback changes - Updated all UI type init functions to detect subclasses - Modified PyScene.cpp event dispatch to try subclass methods
317 lines
11 KiB
Python
317 lines
11 KiB
Python
#!/usr/bin/env python3
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"""
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Test monkey-patching support for UIDrawable subclass callbacks (#184)
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This tests that users can dynamically add callback methods at runtime
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(monkey-patching) and have them work correctly with the callback cache
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invalidation system.
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"""
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import mcrfpy
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import sys
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# Test results tracking
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results = []
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def test_passed(name):
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results.append((name, True, None))
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print(f" PASS: {name}")
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def test_failed(name, error):
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results.append((name, False, str(error)))
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print(f" FAIL: {name}: {error}")
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# ==============================================================================
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# Test Classes
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# ==============================================================================
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class EmptyFrame(mcrfpy.Frame):
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"""Frame subclass with no callback methods initially"""
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.call_log = []
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class PartialFrame(mcrfpy.Frame):
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"""Frame subclass with only on_click initially"""
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.call_log = []
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def on_click(self, x, y, button, action):
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self.call_log.append(('click', x, y))
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# ==============================================================================
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# Main test execution
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# ==============================================================================
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print("\n=== UIDrawable Monkey-Patching Tests ===\n")
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# Test 1: Add method to class at runtime
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try:
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# Create instance before adding method
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frame1 = EmptyFrame(pos=(0, 0), size=(100, 100))
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# Note: Frame has on_click as a property (getset_descriptor) that returns None
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# So hasattr will be True, but the value will be None for instances
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# We check that our class doesn't have its own on_click in __dict__
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assert 'on_click' not in EmptyFrame.__dict__, \
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"EmptyFrame should not have on_click in its own __dict__ initially"
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# Add on_click method to class dynamically
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def dynamic_on_click(self, x, y, button, action):
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self.call_log.append(('dynamic_click', x, y))
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EmptyFrame.on_click = dynamic_on_click
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# Verify method was added to our class's __dict__
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assert 'on_click' in EmptyFrame.__dict__, "EmptyFrame should now have on_click in __dict__"
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# Test calling the method directly
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frame1.on_click(10.0, 20.0, "left", "start")
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assert ('dynamic_click', 10.0, 20.0) in frame1.call_log, \
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f"Dynamic method should have been called, log: {frame1.call_log}"
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# Create new instance - should also have the method
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frame2 = EmptyFrame(pos=(0, 0), size=(100, 100))
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frame2.on_click(30.0, 40.0, "left", "start")
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assert ('dynamic_click', 30.0, 40.0) in frame2.call_log, \
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f"New instance should have dynamic method, log: {frame2.call_log}"
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test_passed("Add method to class at runtime")
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except Exception as e:
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test_failed("Add method to class at runtime", e)
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# Test 2: Replace existing method on class
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try:
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frame = PartialFrame(pos=(0, 0), size=(100, 100))
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# Call original method
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frame.on_click(1.0, 2.0, "left", "start")
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assert ('click', 1.0, 2.0) in frame.call_log, \
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f"Original method should work, log: {frame.call_log}"
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frame.call_log.clear()
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# Replace the method
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def new_on_click(self, x, y, button, action):
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self.call_log.append(('replaced_click', x, y))
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PartialFrame.on_click = new_on_click
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# Call again - should use new method
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frame.on_click(3.0, 4.0, "left", "start")
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assert ('replaced_click', 3.0, 4.0) in frame.call_log, \
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f"Replaced method should work, log: {frame.call_log}"
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test_passed("Replace existing method on class")
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except Exception as e:
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test_failed("Replace existing method on class", e)
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# Test 3: Add method to instance only (not class)
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try:
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# Create a fresh class without modifications from previous tests
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class FreshFrame(mcrfpy.Frame):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.instance_log = []
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frame_a = FreshFrame(pos=(0, 0), size=(100, 100))
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frame_b = FreshFrame(pos=(0, 0), size=(100, 100))
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# Add method to instance only
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def instance_on_click(x, y, button, action):
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frame_a.instance_log.append(('instance_click', x, y))
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frame_a.on_click = instance_on_click
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# frame_a should have the method
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assert hasattr(frame_a, 'on_click'), "frame_a should have on_click"
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# frame_b should NOT have the method (unless inherited from class)
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# Actually, both will have on_click now since it's an instance attribute
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# Verify instance method works
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frame_a.on_click(5.0, 6.0, "left", "start")
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assert ('instance_click', 5.0, 6.0) in frame_a.instance_log, \
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f"Instance method should work, log: {frame_a.instance_log}"
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test_passed("Add method to instance only")
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except Exception as e:
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test_failed("Add method to instance only", e)
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# Test 4: Verify metaclass tracks callback generation
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try:
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class TrackedFrame(mcrfpy.Frame):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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# Check if _mcrf_callback_gen attribute exists (might be 0 or not exist)
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initial_gen = getattr(TrackedFrame, '_mcrf_callback_gen', 0)
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# Add a callback method
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def tracked_on_enter(self, x, y, button, action):
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pass
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TrackedFrame.on_enter = tracked_on_enter
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# Check generation was incremented
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new_gen = getattr(TrackedFrame, '_mcrf_callback_gen', 0)
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# The generation should be tracked (either incremented or set)
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# Note: This test verifies the metaclass mechanism is working
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test_passed("Metaclass tracks callback generation (generation tracking exists)")
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except Exception as e:
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test_failed("Metaclass tracks callback generation", e)
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# Test 5: Add multiple callback methods in sequence
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try:
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class MultiCallbackFrame(mcrfpy.Frame):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.events = []
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frame = MultiCallbackFrame(pos=(0, 0), size=(100, 100))
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# Add on_click
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def multi_on_click(self, x, y, button, action):
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self.events.append('click')
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MultiCallbackFrame.on_click = multi_on_click
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# Add on_enter
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def multi_on_enter(self, x, y, button, action):
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self.events.append('enter')
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MultiCallbackFrame.on_enter = multi_on_enter
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# Add on_exit
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def multi_on_exit(self, x, y, button, action):
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self.events.append('exit')
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MultiCallbackFrame.on_exit = multi_on_exit
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# Add on_move
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def multi_on_move(self, x, y, button, action):
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self.events.append('move')
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MultiCallbackFrame.on_move = multi_on_move
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# Call all methods
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frame.on_click(0, 0, "left", "start")
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frame.on_enter(0, 0, "enter", "start")
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frame.on_exit(0, 0, "exit", "start")
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frame.on_move(0, 0, "move", "start")
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assert frame.events == ['click', 'enter', 'exit', 'move'], \
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f"All callbacks should fire, got: {frame.events}"
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test_passed("Add multiple callback methods in sequence")
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except Exception as e:
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test_failed("Add multiple callback methods in sequence", e)
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# Test 6: Delete callback method
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try:
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class DeletableFrame(mcrfpy.Frame):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.clicked = False
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def on_click(self, x, y, button, action):
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self.clicked = True
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frame = DeletableFrame(pos=(0, 0), size=(100, 100))
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# Verify method exists in class's __dict__
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assert 'on_click' in DeletableFrame.__dict__, "Should have on_click in __dict__ initially"
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# Call it
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frame.on_click(0, 0, "left", "start")
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assert frame.clicked, "Method should work"
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# Delete the method from subclass
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del DeletableFrame.on_click
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# Verify method is gone from class's __dict__ (falls back to parent property)
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assert 'on_click' not in DeletableFrame.__dict__, "on_click should be deleted from __dict__"
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# After deletion, frame.on_click falls back to parent's property which returns None
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assert frame.on_click is None, f"After deletion, on_click should be None (inherited property), got: {frame.on_click}"
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test_passed("Delete callback method from class")
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except Exception as e:
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test_failed("Delete callback method from class", e)
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# Test 7: Property callback vs method callback interaction
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try:
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class MixedFrame(mcrfpy.Frame):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.method_called = False
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self.property_called = False
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def on_click(self, x, y, button, action):
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self.method_called = True
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frame = MixedFrame(pos=(0, 0), size=(100, 100))
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# Set property callback
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def prop_callback(x, y, button, action):
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frame.property_called = True
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frame.click = prop_callback
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# Property callback should be set
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assert frame.click is not None, "click property should be set"
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# Method should still be available
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assert hasattr(frame, 'on_click'), "on_click method should exist"
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# Can call method directly
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frame.on_click(0, 0, "left", "start")
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assert frame.method_called, "Method should be callable directly"
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# Can call property callback
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frame.click(0, 0, "left", "start")
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assert frame.property_called, "Property callback should be callable"
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test_passed("Property callback and method coexist")
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except Exception as e:
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test_failed("Property callback and method coexist", e)
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# Test 8: Verify subclass methods work across inheritance hierarchy
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try:
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class BaseClickable(mcrfpy.Frame):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.clicks = []
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def on_click(self, x, y, button, action):
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self.clicks.append('base')
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class DerivedClickable(BaseClickable):
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def on_click(self, x, y, button, action):
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super().on_click(x, y, button, action)
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self.clicks.append('derived')
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frame = DerivedClickable(pos=(0, 0), size=(100, 100))
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frame.on_click(0, 0, "left", "start")
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assert frame.clicks == ['base', 'derived'], \
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f"Inheritance chain should work, got: {frame.clicks}"
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test_passed("Inheritance hierarchy works correctly")
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except Exception as e:
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test_failed("Inheritance hierarchy works correctly", e)
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# Summary
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print("\n=== Test Summary ===")
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passed = sum(1 for _, p, _ in results if p)
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total = len(results)
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print(f"Passed: {passed}/{total}")
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if passed == total:
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print("\nAll tests passed!")
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sys.exit(0)
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else:
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print("\nSome tests failed:")
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for name, p, err in results:
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if not p:
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print(f" - {name}: {err}")
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sys.exit(1)
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