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-rw-r--r--tests/test_gradient.h152
-rw-r--r--tests/test_main.cpp1
2 files changed, 153 insertions, 0 deletions
diff --git a/tests/test_gradient.h b/tests/test_gradient.h
new file mode 100644
index 0000000000..88fe06b3ec
--- /dev/null
+++ b/tests/test_gradient.h
@@ -0,0 +1,152 @@
+/*************************************************************************/
+/* test_gradient.h */
+/*************************************************************************/
+/* This file is part of: */
+/* GODOT ENGINE */
+/* https://godotengine.org */
+/*************************************************************************/
+/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
+/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
+/* */
+/* 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_GRADIENT_H
+#define TEST_GRADIENT_H
+
+#include "core/class_db.h"
+#include "core/color.h"
+#include "scene/resources/gradient.h"
+
+#include "thirdparty/doctest/doctest.h"
+
+namespace TestGradient {
+
+TEST_CASE("[Gradient] Default gradient") {
+ // Black-white gradient.
+ Ref<Gradient> gradient = memnew(Gradient);
+
+ CHECK_MESSAGE(
+ gradient->get_points_count() == 2,
+ "Default gradient should contain the expected number of points.");
+
+ CHECK_MESSAGE(
+ gradient->get_color_at_offset(0.0).is_equal_approx(Color(0, 0, 0)),
+ "Default gradient should return the expected interpolated value at offset 0.0.");
+ CHECK_MESSAGE(
+ gradient->get_color_at_offset(0.4).is_equal_approx(Color(0.4, 0.4, 0.4)),
+ "Default gradient should return the expected interpolated value at offset 0.4.");
+ CHECK_MESSAGE(
+ gradient->get_color_at_offset(0.8).is_equal_approx(Color(0.8, 0.8, 0.8)),
+ "Default gradient should return the expected interpolated value at offset 0.8.");
+ CHECK_MESSAGE(
+ gradient->get_color_at_offset(1.0).is_equal_approx(Color(1, 1, 1)),
+ "Default gradient should return the expected interpolated value at offset 1.0.");
+
+ // Out of bounds checks.
+ CHECK_MESSAGE(
+ gradient->get_color_at_offset(-1.0).is_equal_approx(Color(0, 0, 0)),
+ "Default gradient should return the expected interpolated value at offset -1.0.");
+ CHECK_MESSAGE(
+ gradient->get_color_at_offset(1234.0).is_equal_approx(Color(1, 1, 1)),
+ "Default gradient should return the expected interpolated value at offset 1234.0.");
+}
+
+TEST_CASE("[Gradient] Custom gradient (points specified in order)") {
+ // Red-yellow-green gradient (with overbright green).
+ Ref<Gradient> gradient = memnew(Gradient);
+ Vector<Gradient::Point> points;
+ points.push_back({ 0.0, Color(1, 0, 0) });
+ points.push_back({ 0.5, Color(1, 1, 0) });
+ points.push_back({ 1.0, Color(0, 2, 0) });
+ gradient->set_points(points);
+
+ CHECK_MESSAGE(
+ gradient->get_points_count() == 3,
+ "Custom gradient should contain the expected number of points.");
+
+ CHECK_MESSAGE(
+ gradient->get_color_at_offset(0.0).is_equal_approx(Color(1, 0, 0)),
+ "Custom gradient should return the expected interpolated value at offset 0.0.");
+ CHECK_MESSAGE(
+ gradient->get_color_at_offset(0.25).is_equal_approx(Color(1, 0.5, 0)),
+ "Custom gradient should return the expected interpolated value at offset 0.25.");
+ CHECK_MESSAGE(
+ gradient->get_color_at_offset(0.5).is_equal_approx(Color(1, 1, 0)),
+ "Custom gradient should return the expected interpolated value at offset 0.5.");
+ CHECK_MESSAGE(
+ gradient->get_color_at_offset(0.75).is_equal_approx(Color(0.5, 1.5, 0)),
+ "Custom gradient should return the expected interpolated value at offset 0.75.");
+ CHECK_MESSAGE(
+ gradient->get_color_at_offset(1.0).is_equal_approx(Color(0, 2, 0)),
+ "Custom gradient should return the expected interpolated value at offset 1.0.");
+
+ gradient->remove_point(1);
+ CHECK_MESSAGE(
+ gradient->get_points_count() == 2,
+ "Custom gradient should contain the expected number of points after removing one point.");
+ CHECK_MESSAGE(
+ gradient->get_color_at_offset(0.5).is_equal_approx(Color(0.5, 1, 0)),
+ "Custom gradient should return the expected interpolated value at offset 0.5 after removing point at index 1.");
+}
+
+TEST_CASE("[Gradient] Custom gradient (points specified out-of-order)") {
+ // HSL rainbow with points specified out of order.
+ // These should be sorted automatically when adding points.
+ Ref<Gradient> gradient = memnew(Gradient);
+ Vector<Gradient::Point> points;
+ points.push_back({ 0.2, Color(1, 0, 0) });
+ points.push_back({ 0.0, Color(1, 1, 0) });
+ points.push_back({ 0.8, Color(0, 1, 0) });
+ points.push_back({ 0.4, Color(0, 1, 1) });
+ points.push_back({ 1.0, Color(0, 0, 1) });
+ points.push_back({ 0.6, Color(1, 0, 1) });
+ gradient->set_points(points);
+
+ CHECK_MESSAGE(
+ gradient->get_points_count() == 6,
+ "Custom out-of-order gradient should contain the expected number of points.");
+
+ CHECK_MESSAGE(
+ gradient->get_color_at_offset(0.0).is_equal_approx(Color(1, 1, 0)),
+ "Custom out-of-order gradient should return the expected interpolated value at offset 0.0.");
+ CHECK_MESSAGE(
+ gradient->get_color_at_offset(0.3).is_equal_approx(Color(0.5, 0.5, 0.5)),
+ "Custom out-of-order gradient should return the expected interpolated value at offset 0.3.");
+ CHECK_MESSAGE(
+ gradient->get_color_at_offset(0.6).is_equal_approx(Color(1, 0, 1)),
+ "Custom out-of-order gradient should return the expected interpolated value at offset 0.6.");
+ CHECK_MESSAGE(
+ gradient->get_color_at_offset(1.0).is_equal_approx(Color(0, 0, 1)),
+ "Custom out-of-order gradient should return the expected interpolated value at offset 1.0.");
+
+ gradient->remove_point(0);
+ CHECK_MESSAGE(
+ gradient->get_points_count() == 5,
+ "Custom out-of-order gradient should contain the expected number of points after removing one point.");
+ // The color will be clamped to the nearest point (which is at offset 0.2).
+ CHECK_MESSAGE(
+ gradient->get_color_at_offset(0.1).is_equal_approx(Color(1, 0, 0)),
+ "Custom out-of-order gradient should return the expected interpolated value at offset 0.1 after removing point at index 0.");
+}
+
+} // namespace TestGradient
+
+#endif // TEST_GRADIENT_H
diff --git a/tests/test_main.cpp b/tests/test_main.cpp
index 137882841c..892cc26a51 100644
--- a/tests/test_main.cpp
+++ b/tests/test_main.cpp
@@ -37,6 +37,7 @@
#include "test_class_db.h"
#include "test_color.h"
#include "test_gdscript.h"
+#include "test_gradient.h"
#include "test_gui.h"
#include "test_math.h"
#include "test_oa_hash_map.h"
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-03 23:58:29 +0000