🐛 ensure blackboard is always available (#262)

addons/beehave/nodes/beehave_tree.gd

@@ -69,6 +69,11 @@ signal tree_disabled
 			_internal_blackboard = Blackboard.new()
 			add_child(_internal_blackboard, false, Node.INTERNAL_MODE_BACK)
 	get:
+		# in case blackboard is accessed before this node is,
+		# we need to ensure that the internal blackboard is used.
+		if not blackboard and not _internal_blackboard:
+			_internal_blackboard = Blackboard.new()
+			add_child(_internal_blackboard, false, Node.INTERNAL_MODE_BACK)
 		return blackboard if blackboard else _internal_blackboard
 
 ## When enabled, this tree is tracked individually
@@ -107,8 +112,8 @@ func _ready() -> void:
 		actor = get_parent()
 
 	if not blackboard:
-		_internal_blackboard = Blackboard.new()
-		add_child(_internal_blackboard, false, Node.INTERNAL_MODE_BACK)
+		# invoke setter to auto-initialise the blackboard.
+		self.blackboard = null
 
 	# Get the name of the parent node name for metric
 	_process_time_metric_name = "beehave [microseconds]/process_time_%s-%s" % [actor.name, get_instance_id()]

examples/BeehaveTestScene.tscn → examples/beehave_test_scene.tscn

@@ -1,103 +1,103 @@
 [gd_scene load_steps=12 format=3 uid="uid://dxkotdttpvmb0"]
 
-[ext_resource type="Script" path="res://examples/BeehaveTestScene.gd" id="1_s45or"]
-[ext_resource type="Texture2D" uid="uid://uq5muso23nn5" path="res://splash.png" id="2_yf6a3"]
-[ext_resource type="Script" path="res://examples/ColorChangingSprite.gd" id="3_4a21r"]
-[ext_resource type="Script" path="res://addons/beehave/nodes/beehave_tree.gd" id="3_hid2l"]
-[ext_resource type="Script" path="res://addons/beehave/nodes/composites/selector_reactive.gd" id="5_3qraw"]
-[ext_resource type="Script" path="res://addons/beehave/nodes/composites/sequence.gd" id="5_ifctq"]
-[ext_resource type="PackedScene" uid="uid://dl8hr0kerrxsv" path="res://examples/conditions/HasPositivePosition.tscn" id="6_7qx5k"]
-[ext_resource type="PackedScene" uid="uid://c3msbcyat8v0n" path="res://examples/actions/SetModulateColor.tscn" id="7_b4xjm"]
-[ext_resource type="PackedScene" uid="uid://dgbwmcsll3o7t" path="res://examples/conditions/HasNegativePosition.tscn" id="8_dorjh"]
-[ext_resource type="Script" path="res://addons/beehave/blackboard.gd" id="9_k8008"]
+[ext_resource type="Script" path="res://examples/beehave_test_scene.gd" id="1_18xg1"]
+[ext_resource type="Texture2D" uid="uid://uq5muso23nn5" path="res://splash.png" id="2_2q57p"]
+[ext_resource type="Script" path="res://examples/ColorChangingSprite.gd" id="3_shmq8"]
+[ext_resource type="Script" path="res://addons/beehave/nodes/beehave_tree.gd" id="4_yb1gg"]
+[ext_resource type="Script" path="res://addons/beehave/nodes/composites/selector_reactive.gd" id="5_l2xef"]
+[ext_resource type="Script" path="res://addons/beehave/nodes/composites/sequence.gd" id="6_jtsdg"]
+[ext_resource type="PackedScene" uid="uid://dl8hr0kerrxsv" path="res://examples/conditions/HasPositivePosition.tscn" id="7_iqb0a"]
+[ext_resource type="PackedScene" uid="uid://c3msbcyat8v0n" path="res://examples/actions/SetModulateColor.tscn" id="8_0v48s"]
+[ext_resource type="PackedScene" uid="uid://dgbwmcsll3o7t" path="res://examples/conditions/HasNegativePosition.tscn" id="9_x8ohm"]
+[ext_resource type="Script" path="res://addons/beehave/blackboard.gd" id="10_y2p03"]
 
 [sub_resource type="CompressedTexture2D" id="CompressedTexture2D_atdvc"]
 load_path = "res://.godot/imported/icon.svg-218a8f2b3041327d8a5756f3a245f83b.ctex"
 
 [node name="BeehaveTestScene" type="Node2D"]
-script = ExtResource("1_s45or")
+script = ExtResource("1_18xg1")
 
 [node name="Background" type="Sprite2D" parent="."]
 modulate = Color(0.882353, 0.882353, 0.882353, 0.141176)
 position = Vector2(32, 46)
 scale = Vector2(2.63487, 2.57664)
-texture = ExtResource("2_yf6a3")
+texture = ExtResource("2_2q57p")
 
 [node name="ColorChangingSprite" type="Sprite2D" parent="."]
 scale = Vector2(0.1, 0.1)
 texture = SubResource("CompressedTexture2D_atdvc")
-script = ExtResource("3_4a21r")
+script = ExtResource("3_shmq8")
 
 [node name="BeehaveTree" type="Node" parent="ColorChangingSprite" node_paths=PackedStringArray("blackboard")]
 unique_name_in_owner = true
-script = ExtResource("3_hid2l")
+script = ExtResource("4_yb1gg")
 blackboard = NodePath("../../Blackboard")
 custom_monitor = true
 
 [node name="SelectorComposite" type="Node" parent="ColorChangingSprite/BeehaveTree"]
-script = ExtResource("5_3qraw")
+script = ExtResource("5_l2xef")
 
 [node name="SequenceComposite" type="Node" parent="ColorChangingSprite/BeehaveTree/SelectorComposite"]
-script = ExtResource("5_ifctq")
+script = ExtResource("6_jtsdg")
 
-[node name="HasPositivePosition" parent="ColorChangingSprite/BeehaveTree/SelectorComposite/SequenceComposite" instance=ExtResource("6_7qx5k")]
+[node name="HasPositivePosition" parent="ColorChangingSprite/BeehaveTree/SelectorComposite/SequenceComposite" instance=ExtResource("7_iqb0a")]
 
-[node name="SetModulateColor" parent="ColorChangingSprite/BeehaveTree/SelectorComposite/SequenceComposite" instance=ExtResource("7_b4xjm")]
+[node name="SetModulateColor" parent="ColorChangingSprite/BeehaveTree/SelectorComposite/SequenceComposite" instance=ExtResource("8_0v48s")]
 modulate_color = Color(1, 0, 0, 1)
 
 [node name="SequenceComposite2" type="Node" parent="ColorChangingSprite/BeehaveTree/SelectorComposite"]
-script = ExtResource("5_ifctq")
+script = ExtResource("6_jtsdg")
 
-[node name="HasNegativePosition" parent="ColorChangingSprite/BeehaveTree/SelectorComposite/SequenceComposite2" instance=ExtResource("8_dorjh")]
+[node name="HasNegativePosition" parent="ColorChangingSprite/BeehaveTree/SelectorComposite/SequenceComposite2" instance=ExtResource("9_x8ohm")]
 
-[node name="SetModulateColor" parent="ColorChangingSprite/BeehaveTree/SelectorComposite/SequenceComposite2" instance=ExtResource("7_b4xjm")]
+[node name="SetModulateColor" parent="ColorChangingSprite/BeehaveTree/SelectorComposite/SequenceComposite2" instance=ExtResource("8_0v48s")]
 modulate_color = Color(0, 0, 1, 1)
 
-[node name="SetModulateColor" parent="ColorChangingSprite/BeehaveTree/SelectorComposite" instance=ExtResource("7_b4xjm")]
+[node name="SetModulateColor" parent="ColorChangingSprite/BeehaveTree/SelectorComposite" instance=ExtResource("8_0v48s")]
 
 [node name="Camera2D" type="Camera2D" parent="ColorChangingSprite"]
 
 [node name="Blackboard" type="Node" parent="."]
-script = ExtResource("9_k8008")
+script = ExtResource("10_y2p03")
 
 [node name="AnotherSprite" type="Sprite2D" parent="."]
 position = Vector2(182, 180)
 scale = Vector2(0.1, 0.1)
 texture = SubResource("CompressedTexture2D_atdvc")
 
 [node name="AnotherTree" type="Node" parent="AnotherSprite" node_paths=PackedStringArray("blackboard")]
-script = ExtResource("3_hid2l")
+script = ExtResource("4_yb1gg")
 blackboard = NodePath("../../Blackboard")
 custom_monitor = null
 
 [node name="SelectorComposite" type="Node" parent="AnotherSprite/AnotherTree"]
-script = ExtResource("5_3qraw")
+script = ExtResource("5_l2xef")
 
 [node name="SequenceComposite" type="Node" parent="AnotherSprite/AnotherTree/SelectorComposite"]
-script = ExtResource("5_ifctq")
+script = ExtResource("6_jtsdg")
 
-[node name="HasPositivePosition" parent="AnotherSprite/AnotherTree/SelectorComposite/SequenceComposite" instance=ExtResource("6_7qx5k")]
+[node name="HasPositivePosition" parent="AnotherSprite/AnotherTree/SelectorComposite/SequenceComposite" instance=ExtResource("7_iqb0a")]
 
-[node name="SetModulateColor" parent="AnotherSprite/AnotherTree/SelectorComposite/SequenceComposite" instance=ExtResource("7_b4xjm")]
+[node name="SetModulateColor" parent="AnotherSprite/AnotherTree/SelectorComposite/SequenceComposite" instance=ExtResource("8_0v48s")]
 modulate_color = Color(1, 0, 0, 1)
 
 [node name="SequenceComposite2" type="Node" parent="AnotherSprite/AnotherTree/SelectorComposite"]
-script = ExtResource("5_ifctq")
+script = ExtResource("6_jtsdg")
 
-[node name="HasNegativePosition" parent="AnotherSprite/AnotherTree/SelectorComposite/SequenceComposite2" instance=ExtResource("8_dorjh")]
+[node name="HasNegativePosition" parent="AnotherSprite/AnotherTree/SelectorComposite/SequenceComposite2" instance=ExtResource("9_x8ohm")]
 
-[node name="SetModulateColor" parent="AnotherSprite/AnotherTree/SelectorComposite/SequenceComposite2" instance=ExtResource("7_b4xjm")]
+[node name="SetModulateColor" parent="AnotherSprite/AnotherTree/SelectorComposite/SequenceComposite2" instance=ExtResource("8_0v48s")]
 modulate_color = Color(0, 0, 1, 1)
 
 [node name="SequenceComposite2" type="Node" parent="AnotherSprite/AnotherTree/SelectorComposite/SequenceComposite2"]
-script = ExtResource("5_ifctq")
+script = ExtResource("6_jtsdg")
 
-[node name="HasNegativePosition" parent="AnotherSprite/AnotherTree/SelectorComposite/SequenceComposite2/SequenceComposite2" instance=ExtResource("8_dorjh")]
+[node name="HasNegativePosition" parent="AnotherSprite/AnotherTree/SelectorComposite/SequenceComposite2/SequenceComposite2" instance=ExtResource("9_x8ohm")]
 
-[node name="SetModulateColor" parent="AnotherSprite/AnotherTree/SelectorComposite/SequenceComposite2/SequenceComposite2" instance=ExtResource("7_b4xjm")]
+[node name="SetModulateColor" parent="AnotherSprite/AnotherTree/SelectorComposite/SequenceComposite2/SequenceComposite2" instance=ExtResource("8_0v48s")]
 modulate_color = Color(0, 0, 1, 1)
 
-[node name="SetModulateColor" parent="AnotherSprite/AnotherTree/SelectorComposite" instance=ExtResource("7_b4xjm")]
+[node name="SetModulateColor" parent="AnotherSprite/AnotherTree/SelectorComposite" instance=ExtResource("8_0v48s")]
 
 [node name="Camera2D" type="Camera2D" parent="AnotherSprite"]
 

project.godot

@@ -11,7 +11,7 @@ config_version=5
 [application]
 
 config/name="Beehave"
-run/main_scene="res://examples/BeehaveTestScene.tscn"
+run/main_scene="res://examples/beehave_test_scene.tscn"
 config/features=PackedStringArray("4.2")
 boot_splash/image="res://splash.png"
 boot_splash/fullsize=false

test/beehave_tree_test.gd

@@ -5,10 +5,14 @@ extends GdUnitTestSuite
 @warning_ignore("return_value_discarded")
 
 # TestSuite generated from
-const __source = "res://addons/beehave/beehave_tree.gd"
+const __source = "res://addons/beehave/nodes/beehave_tree.gd"
 
 func create_scene() -> Node2D:
-	return auto_free(load("res://test/UnitTestScene.tscn").instantiate())
+	return auto_free(load("res://test/unit_test_scene.tscn").instantiate())
+
+
+func create_tree() -> BeehaveTree:
+	return auto_free(load(__source).new())
 
 
 func test_normal_tick() -> void:
@@ -63,3 +67,13 @@ func test_interrupt_running_action() -> void:
 	scene.beehave_tree.interrupt()
 	assert_that(scene.beehave_tree.blackboard.get_value("custom_value")).is_equal(0)
 	assert_that(scene.count_up_action.status).is_equal(BeehaveNode.FAILURE)
+
+
+func test_blackboard_not_initialized() -> void:
+	var tree = create_tree()
+	tree.actor = auto_free(Node2D.new())
+	var always_succeed = auto_free(AlwaysSucceedDecorator.new()) as AlwaysSucceedDecorator
+	always_succeed.add_child(auto_free(ActionLeaf.new()))
+	tree.add_child(always_succeed)
+	var result = tree.tick()
+	assert_that(result).is_equal(BeehaveNode.SUCCESS)

test/blackboard_test.gd

@@ -43,7 +43,7 @@ func test_get_default() -> void:
 	assert_that(blackboard.get_value("my-key2", 234)).is_equal(234)
 
 func test_blackboard_shared_between_trees() -> void:
-	var scene = auto_free(load("res://test/UnitTestScene.tscn").instantiate())
+	var scene = auto_free(load("res://test/unit_test_scene.tscn").instantiate())
 	var runner = scene_runner(scene)
 
 	await runner.simulate_frames(100)

test/e2e_test.gd

@@ -5,7 +5,7 @@ extends GdUnitTestSuite
 @warning_ignore("return_value_discarded")
 
 # TestSuite generated from
-const __source = "res://examples/BeehaveTestScene.tscn"
+const __source = "res://examples/beehave_test_scene.tscn"
 
 func create_scene() -> Node2D:
 	return auto_free(load(__source).instantiate())

test/UnitTestScene.tscn → test/unit_test_scene.tscn

@@ -1,7 +1,7 @@
 [gd_scene load_steps=8 format=3 uid="uid://diw3kjj050wdy"]
 
 [ext_resource type="Script" path="res://addons/beehave/blackboard.gd" id="1_27ukk"]
-[ext_resource type="Script" path="res://test/UnitTestScene.gd" id="1_embiv"]
+[ext_resource type="Script" path="res://test/unit_test_scene.gd" id="1_embiv"]
 [ext_resource type="Script" path="res://addons/beehave/nodes/beehave_tree.gd" id="2_phgmn"]
 [ext_resource type="Script" path="res://addons/beehave/nodes/composites/sequence.gd" id="4_px6t4"]
 [ext_resource type="Script" path="res://test/conditions/value_reached_condition.gd" id="5_rc0ra"]