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Diffstat (limited to 'src/3rdparty/2geom/tests/choose-test.cpp')
| -rw-r--r-- | src/3rdparty/2geom/tests/choose-test.cpp | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/src/3rdparty/2geom/tests/choose-test.cpp b/src/3rdparty/2geom/tests/choose-test.cpp new file mode 100644 index 0000000..766fa0c --- /dev/null +++ b/src/3rdparty/2geom/tests/choose-test.cpp @@ -0,0 +1,72 @@ +/** @file + * @brief Unit tests for the binomial coefficient function. + * Uses the Google Testing Framework + *//* + * Authors: + * Krzysztof Kosiński <tweenk.pl@gmail.com> + * + * Copyright 2015 Authors + * + * This library is free software; you can redistribute it and/or + * modify it either under the terms of the GNU Lesser General Public + * License version 2.1 as published by the Free Software Foundation + * (the "LGPL") or, at your option, under the terms of the Mozilla + * Public License Version 1.1 (the "MPL"). If you do not alter this + * notice, a recipient may use your version of this file under either + * the MPL or the LGPL. + * + * You should have received a copy of the LGPL along with this library + * in the file COPYING-LGPL-2.1; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * You should have received a copy of the MPL along with this library + * in the file COPYING-MPL-1.1 + * + * The contents of this file are subject to the Mozilla Public License + * Version 1.1 (the "License"); you may not use this file except in + * compliance with the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY + * OF ANY KIND, either express or implied. See the LGPL or the MPL for + * the specific language governing rights and limitations. + */ + +#include "testing.h" +#include <2geom/choose.h> +#include <glib.h> + +using namespace Geom; + +TEST(ChooseTest, PascalsTriangle) { + // check whether the values match Pascal's triangle + for (unsigned i = 0; i < 500; ++i) { + int n = g_random_int_range(3, 100); + int k = g_random_int_range(1, n-1); + + double a = choose<double>(n, k); + double b = choose<double>(n-1, k); + double c = choose<double>(n-1, k-1); + + EXPECT_EQ(a, b + c); + } +} + +TEST(ChooseTest, Values) { + // test some well-known values + EXPECT_EQ(choose<double>(0, 0), 1); + EXPECT_EQ(choose<double>(1, 0), 1); + EXPECT_EQ(choose<double>(1, 1), 1); + EXPECT_EQ(choose<double>(127, 127), 1); + EXPECT_EQ(choose<double>(92, 0), 1); + EXPECT_EQ(choose<double>(2, 1), 2); + + // number of possible flops in Texas Hold 'Em Poker + EXPECT_EQ(choose<double>(50, 3), 19600.); + EXPECT_EQ(choose<double>(50, 47), 19600.); + // number of possible hands in bridge + EXPECT_EQ(choose<double>(52, 13), 635013559600.); + EXPECT_EQ(choose<double>(52, 39), 635013559600.); + // number of possible Lotto results + EXPECT_EQ(choose<double>(49, 6), 13983816.); + EXPECT_EQ(choose<double>(49, 43), 13983816.); +} |