Add tests for BTCallMethod

tests/limbo_test.h

@@ -12,10 +12,25 @@
 #ifndef LIMBO_TEST_H
 #define LIMBO_TEST_H
 
+#include "core/object/ref_counted.h"
 #include "tests/test_macros.h"
 
 #include "modules/limboai/bt/tasks/bt_action.h"
 
+class CallbackCounter : public RefCounted {
+	GDCLASS(CallbackCounter, RefCounted);
+
+public:
+	int num_callbacks = 0;
+
+	void callback() { num_callbacks += 1; }
+
+protected:
+	static void _bind_methods() {
+		ClassDB::bind_method(D_METHOD("callback"), &CallbackCounter::callback);
+	}
+};
+
 class BTTestAction : public BTAction {
 	GDCLASS(BTTestAction, BTAction);
 

tests/test_call_method.h

@@ -0,0 +1,74 @@
+/**
+ * test_call_method.h
+ * =============================================================================
+ * Copyright 2021-2023 Serhii Snitsaruk
+ *
+ * Use of this source code is governed by an MIT-style
+ * license that can be found in the LICENSE file or at
+ * https://opensource.org/licenses/MIT.
+ * =============================================================================
+ */
+
+#ifndef TEST_CALL_METHOD_H
+#define TEST_CALL_METHOD_H
+
+#include "limbo_test.h"
+
+#include "modules/limboai/blackboard/bb_param/bb_node.h"
+#include "modules/limboai/blackboard/blackboard.h"
+#include "modules/limboai/bt/tasks/bt_task.h"
+#include "modules/limboai/bt/tasks/scene/bt_call_method.h"
+
+#include "core/os/memory.h"
+
+namespace TestCallMethod {
+
+TEST_CASE("[Modules][LimboAI] BTCallMethod") {
+	Ref<BTCallMethod> cm = memnew(BTCallMethod);
+
+	SUBCASE("When node parameter is null") {
+		cm->set_node_param(nullptr);
+		cm->set_method("test");
+		ERR_PRINT_OFF;
+		CHECK(cm->execute(0.01666) == BTTask::FAILURE);
+		ERR_PRINT_ON;
+	}
+
+	SUBCASE("With object on the blackboard") {
+		Node *dummy = memnew(Node);
+		Ref<Blackboard> bb = memnew(Blackboard);
+
+		Ref<BBNode> node_param = memnew(BBNode);
+		cm->set_node_param(node_param);
+		Ref<CallbackCounter> callback_counter = memnew(CallbackCounter);
+		bb->set_var("object", callback_counter);
+		node_param->set_value_source(BBParam::BLACKBOARD_VAR);
+		node_param->set_variable("object");
+		cm->set_method("callback");
+
+		cm->initialize(dummy, bb);
+
+		SUBCASE("When method is empty") {
+			cm->set_method("");
+			ERR_PRINT_OFF;
+			CHECK(cm->execute(0.01666) == BTTask::FAILURE);
+			ERR_PRINT_ON;
+		}
+		SUBCASE("When method doesn't exist") {
+			cm->set_method("not_found");
+			ERR_PRINT_OFF;
+			CHECK(cm->execute(0.01666) == BTTask::FAILURE);
+			ERR_PRINT_ON;
+		}
+		SUBCASE("When method exists") {
+			CHECK(cm->execute(0.01666) == BTTask::SUCCESS);
+			CHECK(callback_counter->num_callbacks == 1);
+		}
+
+		memdelete(dummy);
+	}
+}
+
+} //namespace TestCallMethod
+
+#endif // TEST_CALL_METHOD_H