| // Ceres Solver - A fast non-linear least squares minimizer |
| // Copyright 2018 Google Inc. All rights reserved. |
| // http://ceres-solver.org/ |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are met: |
| // |
| // * Redistributions of source code must retain the above copyright notice, |
| // this list of conditions and the following disclaimer. |
| // * 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. |
| // * Neither the name of Google Inc. 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 OWNER 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. |
| // |
| // Author: wjr@google.com (William Rucklidge) |
| |
| #include "ceres/parallel_utils.h" |
| |
| #include "ceres/internal/config.h" |
| #include "glog/logging.h" |
| #include "gtest/gtest.h" |
| |
| namespace ceres::internal { |
| |
| // Tests that unfolding linear iterations to triangular iterations produces |
| // indices that are in-range and unique. |
| TEST(LinearIndexToUpperTriangularIndexTest, UniqueAndValid) { |
| for (int n = 0; n < 100; n++) { |
| std::set<std::pair<int, int>> seen_pairs; |
| int actual_work_items = (n * (n + 1)) / 2; |
| for (int k = 0; k < actual_work_items; k++) { |
| int i, j; |
| LinearIndexToUpperTriangularIndex(k, n, &i, &j); |
| EXPECT_GE(i, 0); |
| EXPECT_LT(i, n); |
| EXPECT_GE(j, i); |
| EXPECT_LT(j, n); |
| seen_pairs.insert(std::make_pair(i, j)); |
| } |
| EXPECT_EQ(actual_work_items, seen_pairs.size()); |
| } |
| } |
| |
| } // namespace ceres::internal |