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godot/tests/test_color.h

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/*************************************************************************/
/* test_color.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 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_COLOR_H
#define TEST_COLOR_H
#include "core/math/color.h"
#include "thirdparty/doctest/doctest.h"
namespace TestColor {
TEST_CASE("[Color] Constructor methods") {
const Color blue_rgba = Color(0.25098, 0.376471, 1, 0.501961);
const Color blue_html = Color::html("#4060ff80");
const Color blue_hex = Color::hex(0x4060ff80);
const Color blue_hex64 = Color::hex64(0x4040'6060'ffff'8080);
CHECK_MESSAGE(
blue_rgba.is_equal_approx(blue_html),
"Creation with HTML notation should result in components approximately equal to the default constructor.");
CHECK_MESSAGE(
blue_rgba.is_equal_approx(blue_hex),
"Creation with a 32-bit hexadecimal number should result in components approximately equal to the default constructor.");
CHECK_MESSAGE(
blue_rgba.is_equal_approx(blue_hex64),
"Creation with a 64-bit hexadecimal number should result in components approximately equal to the default constructor.");
ERR_PRINT_OFF;
const Color html_invalid = Color::html("invalid");
ERR_PRINT_ON;
CHECK_MESSAGE(
html_invalid.is_equal_approx(Color()),
"Creation with invalid HTML notation should result in a Color with the default values.");
const Color green_rgba = Color(0, 1, 0, 0.25);
const Color green_hsva = Color(0, 0, 0).from_hsv(120 / 360.0, 1, 1, 0.25);
CHECK_MESSAGE(
green_rgba.is_equal_approx(green_hsva),
"Creation with HSV notation should result in components approximately equal to the default constructor.");
}
TEST_CASE("[Color] Operators") {
const Color blue = Color(0.2, 0.2, 1);
const Color dark_red = Color(0.3, 0.1, 0.1);
// Color components may be negative. Also, the alpha component may be greater than 1.0.
CHECK_MESSAGE(
(blue + dark_red).is_equal_approx(Color(0.5, 0.3, 1.1, 2)),
"Color addition should behave as expected.");
CHECK_MESSAGE(
(blue - dark_red).is_equal_approx(Color(-0.1, 0.1, 0.9, 0)),
"Color subtraction should behave as expected.");
CHECK_MESSAGE(
(blue * 2).is_equal_approx(Color(0.4, 0.4, 2, 2)),
"Color multiplication with a scalar should behave as expected.");
CHECK_MESSAGE(
(blue / 2).is_equal_approx(Color(0.1, 0.1, 0.5, 0.5)),
"Color division with a scalar should behave as expected.");
CHECK_MESSAGE(
(blue * dark_red).is_equal_approx(Color(0.06, 0.02, 0.1)),
"Color multiplication with another Color should behave as expected.");
CHECK_MESSAGE(
(blue / dark_red).is_equal_approx(Color(0.666667, 2, 10)),
"Color division with another Color should behave as expected.");
CHECK_MESSAGE(
(-blue).is_equal_approx(Color(0.8, 0.8, 0, 0)),
"Color negation should behave as expected (affecting the alpha channel, unlike `invert()`).");
}
TEST_CASE("[Color] Reading methods") {
const Color dark_blue = Color(0, 0, 0.5, 0.4);
CHECK_MESSAGE(
Math::is_equal_approx(dark_blue.get_h(), 240 / 360.0),
"The returned HSV hue should match the expected value.");
CHECK_MESSAGE(
Math::is_equal_approx(dark_blue.get_s(), 1),
"The returned HSV saturation should match the expected value.");
CHECK_MESSAGE(
Math::is_equal_approx(dark_blue.get_v(), 0.5),
"The returned HSV value should match the expected value.");
}
TEST_CASE("[Color] Conversion methods") {
const Color cyan = Color(0, 1, 1);
const Color cyan_transparent = Color(0, 1, 1, 0);
CHECK_MESSAGE(
cyan.to_html() == "00ffffff",
"The returned RGB HTML color code should match the expected value.");
CHECK_MESSAGE(
cyan_transparent.to_html() == "00ffff00",
"The returned RGBA HTML color code should match the expected value.");
CHECK_MESSAGE(
cyan.to_argb32() == 0xff00ffff,
"The returned 32-bit RGB number should match the expected value.");
CHECK_MESSAGE(
cyan.to_abgr32() == 0xffffff00,
"The returned 32-bit BGR number should match the expected value.");
CHECK_MESSAGE(
cyan.to_rgba32() == 0x00ffffff,
"The returned 32-bit BGR number should match the expected value.");
CHECK_MESSAGE(
cyan.to_argb64() == 0xffff'0000'ffff'ffff,
"The returned 64-bit RGB number should match the expected value.");
CHECK_MESSAGE(
cyan.to_abgr64() == 0xffff'ffff'ffff'0000,
"The returned 64-bit BGR number should match the expected value.");
CHECK_MESSAGE(
cyan.to_rgba64() == 0x0000'ffff'ffff'ffff,
"The returned 64-bit BGR number should match the expected value.");
CHECK_MESSAGE(
String(cyan) == "0, 1, 1, 1",
"The string representation should match the expected value.");
}
TEST_CASE("[Color] Named colors") {
CHECK_MESSAGE(
Color::named("red").is_equal_approx(Color(1, 0, 0)),
"The named color \"red\" should match the expected value.");
// Named colors have their names automatically normalized.
CHECK_MESSAGE(
Color::named("white_smoke").is_equal_approx(Color(0.96, 0.96, 0.96)),
"The named color \"white_smoke\" should match the expected value.");
CHECK_MESSAGE(
Color::named("Slate Blue").is_equal_approx(Color(0.42, 0.35, 0.80)),
"The named color \"Slate Blue\" should match the expected value.");
ERR_PRINT_OFF;
CHECK_MESSAGE(
Color::named("doesn't exist").is_equal_approx(Color()),
"The invalid named color \"doesn't exist\" should result in a Color with the default values.");
ERR_PRINT_ON;
}
TEST_CASE("[Color] Validation methods") {
CHECK_MESSAGE(
Color::html_is_valid("#4080ff"),
"Valid HTML color (with leading #) should be considered valid.");
CHECK_MESSAGE(
Color::html_is_valid("4080ff"),
"Valid HTML color (without leading #) should be considered valid.");
CHECK_MESSAGE(
!Color::html_is_valid("12345"),
"Invalid HTML color should be considered invalid.");
CHECK_MESSAGE(
!Color::html_is_valid("#fuf"),
"Invalid HTML color should be considered invalid.");
}
TEST_CASE("[Color] Manipulation methods") {
const Color blue = Color(0, 0, 1, 0.4);
CHECK_MESSAGE(
blue.inverted().is_equal_approx(Color(1, 1, 0, 0.4)),
"Inverted color should have its red, green and blue components inverted.");
const Color purple = Color(0.5, 0.2, 0.5, 0.25);
CHECK_MESSAGE(
purple.lightened(0.2).is_equal_approx(Color(0.6, 0.36, 0.6, 0.25)),
"Color should be lightened by the expected amount.");
CHECK_MESSAGE(
purple.darkened(0.2).is_equal_approx(Color(0.4, 0.16, 0.4, 0.25)),
"Color should be darkened by the expected amount.");
const Color red = Color(1, 0, 0, 0.2);
const Color yellow = Color(1, 1, 0, 0.8);
CHECK_MESSAGE(
red.lerp(yellow, 0.5).is_equal_approx(Color(1, 0.5, 0, 0.5)),
"Red interpolated with yellow should be orange (with interpolated alpha).");
}
} // namespace TestColor
#endif // TEST_COLOR_H
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