Add a test suite for Gradient
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/*************************************************************************/
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/* test_gradient.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef TEST_GRADIENT_H
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#define TEST_GRADIENT_H
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#include "core/class_db.h"
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#include "core/color.h"
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#include "scene/resources/gradient.h"
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#include "thirdparty/doctest/doctest.h"
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namespace TestGradient {
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TEST_CASE("[Gradient] Default gradient") {
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// Black-white gradient.
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Ref<Gradient> gradient = memnew(Gradient);
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CHECK_MESSAGE(
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gradient->get_points_count() == 2,
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"Default gradient should contain the expected number of points.");
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CHECK_MESSAGE(
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gradient->get_color_at_offset(0.0).is_equal_approx(Color(0, 0, 0)),
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"Default gradient should return the expected interpolated value at offset 0.0.");
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CHECK_MESSAGE(
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gradient->get_color_at_offset(0.4).is_equal_approx(Color(0.4, 0.4, 0.4)),
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"Default gradient should return the expected interpolated value at offset 0.4.");
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CHECK_MESSAGE(
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gradient->get_color_at_offset(0.8).is_equal_approx(Color(0.8, 0.8, 0.8)),
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"Default gradient should return the expected interpolated value at offset 0.8.");
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CHECK_MESSAGE(
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gradient->get_color_at_offset(1.0).is_equal_approx(Color(1, 1, 1)),
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"Default gradient should return the expected interpolated value at offset 1.0.");
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// Out of bounds checks.
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CHECK_MESSAGE(
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gradient->get_color_at_offset(-1.0).is_equal_approx(Color(0, 0, 0)),
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"Default gradient should return the expected interpolated value at offset -1.0.");
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CHECK_MESSAGE(
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gradient->get_color_at_offset(1234.0).is_equal_approx(Color(1, 1, 1)),
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"Default gradient should return the expected interpolated value at offset 1234.0.");
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}
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TEST_CASE("[Gradient] Custom gradient (points specified in order)") {
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// Red-yellow-green gradient (with overbright green).
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Ref<Gradient> gradient = memnew(Gradient);
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Vector<Gradient::Point> points;
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points.push_back({ 0.0, Color(1, 0, 0) });
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points.push_back({ 0.5, Color(1, 1, 0) });
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points.push_back({ 1.0, Color(0, 2, 0) });
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gradient->set_points(points);
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CHECK_MESSAGE(
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gradient->get_points_count() == 3,
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"Custom gradient should contain the expected number of points.");
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CHECK_MESSAGE(
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gradient->get_color_at_offset(0.0).is_equal_approx(Color(1, 0, 0)),
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"Custom gradient should return the expected interpolated value at offset 0.0.");
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CHECK_MESSAGE(
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gradient->get_color_at_offset(0.25).is_equal_approx(Color(1, 0.5, 0)),
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"Custom gradient should return the expected interpolated value at offset 0.25.");
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CHECK_MESSAGE(
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gradient->get_color_at_offset(0.5).is_equal_approx(Color(1, 1, 0)),
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"Custom gradient should return the expected interpolated value at offset 0.5.");
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CHECK_MESSAGE(
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gradient->get_color_at_offset(0.75).is_equal_approx(Color(0.5, 1.5, 0)),
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"Custom gradient should return the expected interpolated value at offset 0.75.");
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CHECK_MESSAGE(
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gradient->get_color_at_offset(1.0).is_equal_approx(Color(0, 2, 0)),
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"Custom gradient should return the expected interpolated value at offset 1.0.");
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gradient->remove_point(1);
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CHECK_MESSAGE(
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gradient->get_points_count() == 2,
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"Custom gradient should contain the expected number of points after removing one point.");
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CHECK_MESSAGE(
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gradient->get_color_at_offset(0.5).is_equal_approx(Color(0.5, 1, 0)),
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"Custom gradient should return the expected interpolated value at offset 0.5 after removing point at index 1.");
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}
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TEST_CASE("[Gradient] Custom gradient (points specified out-of-order)") {
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// HSL rainbow with points specified out of order.
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// These should be sorted automatically when adding points.
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Ref<Gradient> gradient = memnew(Gradient);
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Vector<Gradient::Point> points;
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points.push_back({ 0.2, Color(1, 0, 0) });
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points.push_back({ 0.0, Color(1, 1, 0) });
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points.push_back({ 0.8, Color(0, 1, 0) });
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points.push_back({ 0.4, Color(0, 1, 1) });
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points.push_back({ 1.0, Color(0, 0, 1) });
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points.push_back({ 0.6, Color(1, 0, 1) });
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gradient->set_points(points);
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CHECK_MESSAGE(
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gradient->get_points_count() == 6,
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"Custom out-of-order gradient should contain the expected number of points.");
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CHECK_MESSAGE(
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gradient->get_color_at_offset(0.0).is_equal_approx(Color(1, 1, 0)),
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"Custom out-of-order gradient should return the expected interpolated value at offset 0.0.");
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CHECK_MESSAGE(
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gradient->get_color_at_offset(0.3).is_equal_approx(Color(0.5, 0.5, 0.5)),
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"Custom out-of-order gradient should return the expected interpolated value at offset 0.3.");
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CHECK_MESSAGE(
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gradient->get_color_at_offset(0.6).is_equal_approx(Color(1, 0, 1)),
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"Custom out-of-order gradient should return the expected interpolated value at offset 0.6.");
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CHECK_MESSAGE(
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gradient->get_color_at_offset(1.0).is_equal_approx(Color(0, 0, 1)),
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"Custom out-of-order gradient should return the expected interpolated value at offset 1.0.");
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gradient->remove_point(0);
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CHECK_MESSAGE(
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gradient->get_points_count() == 5,
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"Custom out-of-order gradient should contain the expected number of points after removing one point.");
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// The color will be clamped to the nearest point (which is at offset 0.2).
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CHECK_MESSAGE(
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gradient->get_color_at_offset(0.1).is_equal_approx(Color(1, 0, 0)),
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"Custom out-of-order gradient should return the expected interpolated value at offset 0.1 after removing point at index 0.");
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}
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} // namespace TestGradient
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#endif // TEST_GRADIENT_H
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@ -37,6 +37,7 @@
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#include "test_class_db.h"
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#include "test_color.h"
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#include "test_gdscript.h"
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#include "test_gradient.h"
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#include "test_gui.h"
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#include "test_math.h"
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#include "test_oa_hash_map.h"
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