Add unit tests for PackedScene

tests/scene/test_packed_scene.h

@@ -0,0 +1,114 @@
+/**************************************************************************/
+/*  test_packed_scene.h                                                   */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#ifndef TEST_PACKED_SCENE_H
+#define TEST_PACKED_SCENE_H
+
+#include "scene/resources/packed_scene.h"
+
+#include "tests/test_macros.h"
+
+namespace TestPackedScene {
+
+TEST_CASE("[PackedScene] Pack Scene and Retrieve State") {
+	// Create a scene to pack.
+	Node *scene = memnew(Node);
+	scene->set_name("TestScene");
+
+	// Pack the scene.
+	PackedScene packed_scene;
+	const Error err = packed_scene.pack(scene);
+	CHECK(err == OK);
+
+	// Retrieve the packed state.
+	Ref<SceneState> state = packed_scene.get_state();
+	CHECK(state.is_valid());
+	CHECK(state->get_node_count() == 1);
+	CHECK(state->get_node_name(0) == "TestScene");
+
+	memdelete(scene);
+}
+
+TEST_CASE("[PackedScene] Clear Packed Scene") {
+	// Create a scene to pack.
+	Node *scene = memnew(Node);
+	scene->set_name("TestScene");
+
+	// Pack the scene.
+	PackedScene packed_scene;
+	packed_scene.pack(scene);
+
+	// Clear the packed scene.
+	packed_scene.clear();
+
+	// Check if it has been cleared.
+	Ref<SceneState> state = packed_scene.get_state();
+	CHECK_FALSE(state->get_node_count() == 1);
+
+	memdelete(scene);
+}
+
+TEST_CASE("[PackedScene] Can Instantiate Packed Scene") {
+	// Create a scene to pack.
+	Node *scene = memnew(Node);
+	scene->set_name("TestScene");
+
+	// Pack the scene.
+	PackedScene packed_scene;
+	packed_scene.pack(scene);
+
+	// Check if the packed scene can be instantiated.
+	const bool can_instantiate = packed_scene.can_instantiate();
+	CHECK(can_instantiate == true);
+
+	memdelete(scene);
+}
+
+TEST_CASE("[PackedScene] Instantiate Packed Scene") {
+	// Create a scene to pack.
+	Node *scene = memnew(Node);
+	scene->set_name("TestScene");
+
+	// Pack the scene.
+	PackedScene packed_scene;
+	packed_scene.pack(scene);
+
+	// Instantiate the packed scene.
+	Node *instance = packed_scene.instantiate();
+	CHECK(instance != nullptr);
+	CHECK(instance->get_name() == "TestScene");
+
+	memdelete(scene);
+	memdelete(instance);
+}
+
+} // namespace TestPackedScene
+
+#endif // TEST_PACKED_SCENE_H

tests/test_main.cpp

@@ -104,6 +104,7 @@
 #include "tests/scene/test_navigation_region_2d.h"
 #include "tests/scene/test_navigation_region_3d.h"
 #include "tests/scene/test_node.h"
+#include "tests/scene/test_packed_scene.h"
 #include "tests/scene/test_path_2d.h"
 #include "tests/scene/test_path_3d.h"
 #include "tests/scene/test_primitives.h"