From 5727eda0e1b7d9f686b11e1cd9afa110167d4341 Mon Sep 17 00:00:00 2001
From: Julian <julianheuser@outlook.com>
Date: Sat, 4 Jan 2025 14:28:38 -0500
Subject: [PATCH] GLTFDocument test case

---
 tests/data/models/cube.bin       | Bin 0 -> 1224 bytes
 tests/data/models/cube.gltf      | 312 +++++++++++++++++++++++++++++++
 tests/data/models/suzanne.glb    | Bin 0 -> 70636 bytes
 tests/scene/test_gltf_document.h | 250 +++++++++++++++++++++++++
 tests/test_main.cpp              |   1 +
 5 files changed, 563 insertions(+)
 create mode 100644 tests/data/models/cube.bin
 create mode 100644 tests/data/models/cube.gltf
 create mode 100644 tests/data/models/suzanne.glb
 create mode 100644 tests/scene/test_gltf_document.h

diff --git a/tests/data/models/cube.bin b/tests/data/models/cube.bin
new file mode 100644
index 0000000000000000000000000000000000000000..755b568b68edeedd3c24a1f5366c0497964ee54c
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diff --git a/tests/data/models/cube.gltf b/tests/data/models/cube.gltf
new file mode 100644
index 000000000000..836344c384e6
--- /dev/null
+++ b/tests/data/models/cube.gltf
@@ -0,0 +1,312 @@
+{
+	"asset":{
+		"generator":"Khronos glTF Blender I/O v4.3.47",
+		"version":"2.0"
+	},
+	"scene":0,
+	"scenes":[
+		{
+			"name":"Scene",
+			"nodes":[
+				0
+			]
+		}
+	],
+	"nodes":[
+		{
+			"mesh":0,
+			"name":"Cube"
+		}
+	],
+	"animations":[
+		{
+			"channels":[
+				{
+					"sampler":0,
+					"target":{
+						"node":0,
+						"path":"translation"
+					}
+				},
+				{
+					"sampler":1,
+					"target":{
+						"node":0,
+						"path":"rotation"
+					}
+				},
+				{
+					"sampler":2,
+					"target":{
+						"node":0,
+						"path":"scale"
+					}
+				}
+			],
+			"name":"CubeAction",
+			"samplers":[
+				{
+					"input":8,
+					"interpolation":"LINEAR",
+					"output":9
+				},
+				{
+					"input":10,
+					"interpolation":"STEP",
+					"output":11
+				},
+				{
+					"input":10,
+					"interpolation":"STEP",
+					"output":12
+				}
+			]
+		}
+	],
+	"materials":[
+		{
+			"doubleSided":true,
+			"name":"Material1",
+			"pbrMetallicRoughness":{
+				"baseColorFactor":[
+					1.9073486328125e-06,
+					0,
+					1,
+					1
+				],
+				"metallicFactor":0
+			}
+		},
+		{
+			"doubleSided":true,
+			"name":"Material2",
+			"pbrMetallicRoughness":{
+				"baseColorFactor":[
+					0,
+					1,
+					0,
+					1
+				],
+				"roughnessFactor":0
+			}
+		}
+	],
+	"meshes":[
+		{
+			"name":"Cube.001",
+			"primitives":[
+				{
+					"attributes":{
+						"POSITION":0,
+						"NORMAL":1,
+						"TEXCOORD_0":2
+					},
+					"indices":3,
+					"material":0
+				},
+				{
+					"attributes":{
+						"POSITION":4,
+						"NORMAL":5,
+						"TEXCOORD_0":6
+					},
+					"indices":7,
+					"material":1
+				}
+			]
+		}
+	],
+	"accessors":[
+		{
+			"bufferView":0,
+			"componentType":5126,
+			"count":4,
+			"max":[
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+			"min":[
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+			"type":"VEC3"
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+			"count":6,
+			"type":"SCALAR"
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+			"type":"VEC3"
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+	"bufferViews":[
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+			"byteLength":48,
+			"byteOffset":0,
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+		{
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+			"byteOffset":128,
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+		{
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+			"byteLength":240,
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+		},
+		{
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+			"byteLength":8,
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+		},
+		{
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+		},
+		{
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+	],
+	"buffers":[
+		{
+			"byteLength":1224,
+			"uri":"cube.bin"
+		}
+	]
+}
diff --git a/tests/data/models/suzanne.glb b/tests/data/models/suzanne.glb
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diff --git a/tests/scene/test_gltf_document.h b/tests/scene/test_gltf_document.h
new file mode 100644
index 000000000000..f8106c0614f6
--- /dev/null
+++ b/tests/scene/test_gltf_document.h
@@ -0,0 +1,250 @@
+/**************************************************************************/
+/*  test_gltf_document.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_GLTF_DOCUMENT_H
+#define TEST_GLTF_DOCUMENT_H
+
+#include "modules/gltf/extensions/gltf_document_extension_convert_importer_mesh.h"
+#include "modules/gltf/gltf_document.h"
+
+#include "tests/test_macros.h"
+#include "tests/test_utils.h"
+
+namespace TestGLTFDocument {
+
+struct GLTFArraySize {
+	String key;
+	int val;
+};
+
+struct GLTFKeyValue {
+	String key;
+	Variant val;
+};
+
+struct GLTFTestCase {
+	String filename;
+	String copywrite;
+	String generator;
+	String version;
+	Vector<GLTFArraySize> array_sizes;
+	Vector<GLTFArraySize> json_array_sizes;
+	Vector<GLTFKeyValue> keyvalues;
+};
+
+const GLTFTestCase glTF_test_cases[] = {
+	{ "models/cube.gltf",
+			"",
+			"Khronos glTF Blender I/O v4.3.47",
+			"2.0",
+			// Here are the array sizes.
+			{
+					{ "nodes", 1 },
+					{ "buffers", 1 },
+					{ "buffer_views", 13 },
+					{ "accessors", 13 },
+					{ "meshes", 1 },
+					{ "materials", 2 },
+					{ "root_nodes", 1 },
+					{ "textures", 0 },
+					{ "texture_samplers", 0 },
+					{ "images", 0 },
+					{ "skins", 0 },
+					{ "cameras", 0 },
+					{ "lights", 0 },
+					{ "skeletons", 0 },
+					{ "animations", 1 },
+			},
+			// Here are the json array sizes.
+			{
+					{ "scenes", 1 },
+					{ "nodes", 1 },
+					{ "animations", 1 },
+					{ "meshes", 1 },
+					{ "accessors", 13 },
+					{ "bufferViews", 13 },
+					{ "buffers", 1 },
+			},
+			// Here are the key-value pairs.
+			{
+					{ "major_version", 2 },
+					{ "minor_version", 0 },
+					{ "scene_name", "cube" },
+					{ "filename", "cube" } } },
+	{ "models/suzanne.glb",
+			"this is example text",
+			"Khronos glTF Blender I/O v4.3.47",
+			"2.0",
+			// Here are the array sizes.
+			{
+					{ "glb_data", 68908 },
+					{ "nodes", 2 },
+					{ "buffers", 1 },
+					{ "buffer_views", 5 },
+					{ "accessors", 4 },
+					{ "meshes", 1 },
+					{ "materials", 1 },
+					{ "root_nodes", 2 },
+					{ "textures", 1 },
+					{ "texture_samplers", 1 },
+					{ "images", 1 },
+					{ "skins", 0 },
+					{ "cameras", 1 },
+					{ "lights", 0 },
+					{ "unique_names", 4 },
+					{ "skeletons", 0 },
+					{ "animations", 0 },
+			},
+			// Here are the json array sizes.
+			{
+					{ "scenes", 1 },
+					{ "nodes", 2 },
+					{ "cameras", 1 },
+					{ "materials", 1 },
+					{ "meshes", 1 },
+					{ "textures", 1 },
+					{ "images", 1 },
+					{ "accessors", 4 },
+					{ "bufferViews", 5 },
+					{ "buffers", 1 },
+			},
+			// Here are the key-value pairs.
+			{
+					{ "major_version", 2 },
+					{ "minor_version", 0 },
+					{ "scene_name", "suzanne" },
+					{ "filename", "suzanne" } } },
+};
+
+void register_gltf_extension() {
+	GLTFDocument::unregister_all_gltf_document_extensions();
+
+	// Ensures meshes become a MeshInstance3D and not an ImporterMeshInstance3D.
+	Ref<GLTFDocumentExtensionConvertImporterMesh> extension_GLTFDocumentExtensionConvertImporterMesh;
+	extension_GLTFDocumentExtensionConvertImporterMesh.instantiate();
+	GLTFDocument::register_gltf_document_extension(extension_GLTFDocumentExtensionConvertImporterMesh);
+}
+
+void test_gltf_document_values(Ref<GLTFDocument> &p_gltf_document, Ref<GLTFState> &p_gltf_state, const GLTFTestCase &p_test_case) {
+	const Error err = p_gltf_document->append_from_file(TestUtils::get_data_path(p_test_case.filename), p_gltf_state);
+	REQUIRE(err == OK);
+
+	for (GLTFArraySize array_size : p_test_case.array_sizes) {
+		CHECK_MESSAGE(((Array)(p_gltf_state->getvar(array_size.key))).size() == array_size.val, "Expected \"", array_size.key, "\" to have ", array_size.val, " elements.");
+	}
+
+	for (GLTFArraySize array_size : p_test_case.json_array_sizes) {
+		CHECK(p_gltf_state->get_json().has(array_size.key));
+		CHECK_MESSAGE(((Array)(p_gltf_state->get_json()[array_size.key])).size() == array_size.val, "Expected \"", array_size.key, "\" to have ", array_size.val, " elements.");
+	}
+
+	for (GLTFKeyValue key_value : p_test_case.keyvalues) {
+		CHECK_MESSAGE(p_gltf_state->getvar(key_value.key) == key_value.val, "Expected \"", key_value.key, "\" to be \"", key_value.val, "\".");
+	}
+
+	CHECK(p_gltf_state->get_copyright() == p_test_case.copywrite);
+	CHECK(((Dictionary)p_gltf_state->get_json()["asset"])["generator"] == p_test_case.generator);
+	CHECK(((Dictionary)p_gltf_state->get_json()["asset"])["version"] == p_test_case.version);
+}
+
+void test_gltf_save(Node *p_node) {
+	Ref<GLTFDocument> gltf_document_save;
+	gltf_document_save.instantiate();
+	Ref<GLTFState> gltf_state_save;
+	gltf_state_save.instantiate();
+
+	gltf_document_save->append_from_scene(p_node, gltf_state_save);
+
+	// Check saving the scene to gltf and glb.
+	const Error err_save_gltf = gltf_document_save->write_to_filesystem(gltf_state_save, TestUtils::get_temp_path("cube.gltf"));
+	const Error err_save_glb = gltf_document_save->write_to_filesystem(gltf_state_save, TestUtils::get_temp_path("cube.glb"));
+	CHECK(err_save_gltf == OK);
+	CHECK(err_save_glb == OK);
+}
+
+TEST_CASE("[SceneTree][GLTFDocument] Load cube.gltf") {
+	register_gltf_extension();
+
+	Ref<GLTFDocument> gltf_document;
+	gltf_document.instantiate();
+	Ref<GLTFState> gltf_state;
+	gltf_state.instantiate();
+
+	test_gltf_document_values(gltf_document, gltf_state, glTF_test_cases[0]);
+
+	Node *node = gltf_document->generate_scene(gltf_state);
+
+	// Check the loaded scene.
+	CHECK(node->is_class("Node3D"));
+	CHECK(node->get_name() == "cube");
+
+	CHECK(node->get_child(0)->is_class("MeshInstance3D"));
+	CHECK(node->get_child(0)->get_name() == "Cube");
+
+	CHECK(node->get_child(1)->is_class("AnimationPlayer"));
+	CHECK(node->get_child(1)->get_name() == "AnimationPlayer");
+
+	test_gltf_save(node);
+
+	// Clean up the node.
+	memdelete(node);
+}
+
+TEST_CASE("[SceneTree][GLTFDocument] Load suzanne.glb") {
+	register_gltf_extension();
+
+	Ref<GLTFDocument> gltf_document;
+	gltf_document.instantiate();
+	Ref<GLTFState> gltf_state;
+	gltf_state.instantiate();
+
+	test_gltf_document_values(gltf_document, gltf_state, glTF_test_cases[1]);
+
+	Node *node = gltf_document->generate_scene(gltf_state);
+
+	// Check the loaded scene.
+	CHECK(node->is_class("Node3D"));
+	CHECK(node->get_name() == "suzanne");
+
+	CHECK(node->get_child(0)->is_class("MeshInstance3D"));
+	CHECK(node->get_child(0)->get_name() == "Suzanne");
+
+	CHECK(node->get_child(1)->is_class("Camera3D"));
+	CHECK(node->get_child(1)->get_name() == "Camera");
+
+	test_gltf_save(node);
+
+	// Clean up the node.
+	memdelete(node);
+}
+
+} // namespace TestGLTFDocument
+
+#endif // TEST_GLTF_DOCUMENT_H
diff --git a/tests/test_main.cpp b/tests/test_main.cpp
index e264cfb292b4..6598d57d1b22 100644
--- a/tests/test_main.cpp
+++ b/tests/test_main.cpp
@@ -170,6 +170,7 @@
 
 #include "tests/scene/test_arraymesh.h"
 #include "tests/scene/test_camera_3d.h"
+#include "tests/scene/test_gltf_document.h"
 #include "tests/scene/test_height_map_shape_3d.h"
 #include "tests/scene/test_path_3d.h"
 #include "tests/scene/test_path_follow_3d.h"