From b2e38f3c4bffef854720cdbb8fe0d78f470503d7 Mon Sep 17 00:00:00 2001
From: jonas <jonas.bonnaudet@gmail.com>
Date: Fri, 20 Sep 2024 11:19:53 +0200
Subject: [PATCH] Add unit tests for PhysicsMaterial

---
 tests/scene/test_physics_material.h | 107 ++++++++++++++++++++++++++++
 tests/test_main.cpp                 |   1 +
 2 files changed, 108 insertions(+)
 create mode 100644 tests/scene/test_physics_material.h

diff --git a/tests/scene/test_physics_material.h b/tests/scene/test_physics_material.h
new file mode 100644
index 00000000000..a078166f424
--- /dev/null
+++ b/tests/scene/test_physics_material.h
@@ -0,0 +1,107 @@
+/**************************************************************************/
+/*  test_physics_material.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_PHYSICS_MATERIAL_H
+#define TEST_PHYSICS_MATERIAL_H
+
+#include "scene/resources/physics_material.h"
+#include "tests/test_macros.h"
+
+namespace TestPhysics_material {
+
+TEST_CASE("[Physics_material] Defaults") {
+	Ref<PhysicsMaterial> physics_material;
+	physics_material.instantiate();
+
+	CHECK(physics_material->get_friction() == 1.);
+	CHECK(physics_material->is_rough() == false);
+	CHECK(physics_material->get_bounce() == 0.);
+	CHECK(physics_material->is_absorbent() == false);
+}
+
+TEST_CASE("[Physics_material] Friction") {
+	Ref<PhysicsMaterial> physics_material;
+	physics_material.instantiate();
+
+	real_t friction = 0.314;
+	physics_material->set_friction(friction);
+	CHECK(physics_material->get_friction() == friction);
+}
+
+TEST_CASE("[Physics_material] Rough") {
+	Ref<PhysicsMaterial> physics_material;
+	physics_material.instantiate();
+
+	bool rough = true;
+	physics_material->set_rough(rough);
+	CHECK(physics_material->is_rough() == rough);
+
+	real_t friction = 0.314;
+	physics_material->set_friction(friction);
+	CHECK(physics_material->computed_friction() == -friction);
+
+	rough = false;
+	physics_material->set_rough(rough);
+	CHECK(physics_material->is_rough() == rough);
+
+	CHECK(physics_material->computed_friction() == friction);
+}
+
+TEST_CASE("[Physics_material] Bounce") {
+	Ref<PhysicsMaterial> physics_material;
+	physics_material.instantiate();
+
+	real_t bounce = 0.271;
+	physics_material->set_bounce(bounce);
+	CHECK(physics_material->get_bounce() == bounce);
+}
+
+TEST_CASE("[Physics_material] Absorbent") {
+	Ref<PhysicsMaterial> physics_material;
+	physics_material.instantiate();
+
+	bool absorbent = true;
+	physics_material->set_absorbent(absorbent);
+	CHECK(physics_material->is_absorbent() == absorbent);
+
+	real_t bounce = 0.271;
+	physics_material->set_bounce(bounce);
+	CHECK(physics_material->computed_bounce() == -bounce);
+
+	absorbent = false;
+	physics_material->set_absorbent(absorbent);
+	CHECK(physics_material->is_absorbent() == absorbent);
+
+	CHECK(physics_material->computed_bounce() == bounce);
+}
+
+} // namespace TestPhysics_material
+
+#endif // TEST_PHYSICS_MATERIAL_H
diff --git a/tests/test_main.cpp b/tests/test_main.cpp
index 14a78558322..cc93c20d7f1 100644
--- a/tests/test_main.cpp
+++ b/tests/test_main.cpp
@@ -125,6 +125,7 @@
 #include "tests/scene/test_parallax_2d.h"
 #include "tests/scene/test_path_2d.h"
 #include "tests/scene/test_path_follow_2d.h"
+#include "tests/scene/test_physics_material.h"
 #include "tests/scene/test_sprite_frames.h"
 #include "tests/scene/test_style_box_texture.h"
 #include "tests/scene/test_theme.h"