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Diffstat (limited to 'tests/test_gradient.h')
| -rw-r--r-- | tests/test_gradient.h | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/tests/test_gradient.h b/tests/test_gradient.h new file mode 100644 index 0000000000..0c018c33e5 --- /dev/null +++ b/tests/test_gradient.h @@ -0,0 +1,151 @@ +/*************************************************************************/ +/* 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/math/color.h" +#include "core/object/class_db.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 |