From 0c36b9f93128cd814fabac34a797d3fbd02d97b6 Mon Sep 17 00:00:00 2001 From: moneromooo-monero Date: Wed, 13 Sep 2017 09:22:16 +0100 Subject: common: add apply_permutation file and function This algorithm is adapted from Raymond Chen's code: https://blogs.msdn.microsoft.com/oldnewthing/20170109-00/?p=95145 --- tests/unit_tests/apply_permutation.cpp | 45 ++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 tests/unit_tests/apply_permutation.cpp (limited to 'tests/unit_tests/apply_permutation.cpp') diff --git a/tests/unit_tests/apply_permutation.cpp b/tests/unit_tests/apply_permutation.cpp new file mode 100644 index 000000000..888a00746 --- /dev/null +++ b/tests/unit_tests/apply_permutation.cpp @@ -0,0 +1,45 @@ +// Copyright (c) 2017, The Monero Project +// +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without modification, are +// permitted provided that the following conditions are met: +// +// 1. Redistributions of source code must retain the above copyright notice, this list of +// conditions and the following disclaimer. +// +// 2. Redistributions in binary form must reproduce the above copyright notice, this list +// of conditions and the following disclaimer in the documentation and/or other +// materials provided with the distribution. +// +// 3. Neither the name of the copyright holder nor the names of its contributors may be +// used to endorse or promote products derived from this software without specific +// prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY +// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF +// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL +// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, +// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, +// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF +// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#include "gtest/gtest.h" +#include "common/apply_permutation.h" + +TEST(apply_permutation, empty) +{ + std::vector v = {}; + tools::apply_permutation({}, v); + ASSERT_EQ(v, std::vector({})); +} + +TEST(apply_permutation, reorder) +{ + // 0 1 2 3 4 5 6 + std::vector v = {8, 4, 6, 1, 7, 2, 4}; + tools::apply_permutation({3, 5, 6, 1, 2, 4, 0}, v); + ASSERT_EQ(v, std::vector({1, 2, 4, 4, 6, 7, 8})); +} -- cgit v1.2.3