| // Ceres Solver - A fast non-linear least squares minimizer |
| // Copyright 2015 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: sameeragarwal@google.com (Sameer Agarwal) |
| |
| #include "ceres/graph.h" |
| |
| #include <unordered_set> |
| |
| #include "gtest/gtest.h" |
| |
| namespace ceres { |
| namespace internal { |
| |
| TEST(Graph, EmptyGraph) { |
| Graph<int> graph; |
| EXPECT_EQ(graph.vertices().size(), 0); |
| } |
| |
| TEST(Graph, AddVertexAndEdge) { |
| Graph<int> graph; |
| graph.AddVertex(0); |
| graph.AddVertex(1); |
| graph.AddEdge(0, 1); |
| |
| const std::unordered_set<int>& vertices = graph.vertices(); |
| EXPECT_EQ(vertices.size(), 2); |
| EXPECT_EQ(graph.Neighbors(0).size(), 1); |
| EXPECT_EQ(graph.Neighbors(1).size(), 1); |
| } |
| |
| TEST(Graph, AddVertexIdempotence) { |
| Graph<int> graph; |
| graph.AddVertex(0); |
| graph.AddVertex(1); |
| graph.AddEdge(0, 1); |
| |
| const std::unordered_set<int>& vertices = graph.vertices(); |
| |
| EXPECT_EQ(vertices.size(), 2); |
| |
| // Try adding the vertex again with a new weight. |
| graph.AddVertex(0); |
| EXPECT_EQ(vertices.size(), 2); |
| |
| // Rest of the graph remains the same. |
| EXPECT_EQ(graph.Neighbors(0).size(), 1); |
| EXPECT_EQ(graph.Neighbors(1).size(), 1); |
| } |
| |
| TEST(Graph, DieOnNonExistentVertex) { |
| Graph<int> graph; |
| graph.AddVertex(0); |
| graph.AddVertex(1); |
| graph.AddEdge(0, 1); |
| |
| EXPECT_DEATH_IF_SUPPORTED(graph.Neighbors(2), "key not found"); |
| } |
| |
| TEST(WeightedGraph, EmptyGraph) { |
| WeightedGraph<int> graph; |
| EXPECT_EQ(graph.vertices().size(), 0); |
| } |
| |
| TEST(WeightedGraph, AddVertexAndEdge) { |
| WeightedGraph<int> graph; |
| graph.AddVertex(0, 1.0); |
| graph.AddVertex(1, 2.0); |
| graph.AddEdge(0, 1, 0.5); |
| |
| const std::unordered_set<int>& vertices = graph.vertices(); |
| EXPECT_EQ(vertices.size(), 2); |
| EXPECT_EQ(graph.VertexWeight(0), 1.0); |
| EXPECT_EQ(graph.VertexWeight(1), 2.0); |
| EXPECT_EQ(graph.Neighbors(0).size(), 1); |
| EXPECT_EQ(graph.Neighbors(1).size(), 1); |
| EXPECT_EQ(graph.EdgeWeight(0, 1), 0.5); |
| EXPECT_EQ(graph.EdgeWeight(1, 0), 0.5); |
| } |
| |
| TEST(WeightedGraph, AddVertexIdempotence) { |
| WeightedGraph<int> graph; |
| graph.AddVertex(0, 1.0); |
| graph.AddVertex(1, 2.0); |
| graph.AddEdge(0, 1, 0.5); |
| |
| const std::unordered_set<int>& vertices = graph.vertices(); |
| |
| EXPECT_EQ(vertices.size(), 2); |
| |
| // Try adding the vertex again with a new weight. |
| graph.AddVertex(0, 3.0); |
| EXPECT_EQ(vertices.size(), 2); |
| |
| // The vertex weight is reset. |
| EXPECT_EQ(graph.VertexWeight(0), 3.0); |
| |
| // Rest of the graph remains the same. |
| EXPECT_EQ(graph.VertexWeight(1), 2.0); |
| EXPECT_EQ(graph.Neighbors(0).size(), 1); |
| EXPECT_EQ(graph.Neighbors(1).size(), 1); |
| EXPECT_EQ(graph.EdgeWeight(0, 1), 0.5); |
| EXPECT_EQ(graph.EdgeWeight(1, 0), 0.5); |
| } |
| |
| TEST(WeightedGraph, DieOnNonExistentVertex) { |
| WeightedGraph<int> graph; |
| graph.AddVertex(0, 1.0); |
| graph.AddVertex(1, 2.0); |
| graph.AddEdge(0, 1, 0.5); |
| |
| EXPECT_DEATH_IF_SUPPORTED(graph.VertexWeight(2), "key not found"); |
| EXPECT_DEATH_IF_SUPPORTED(graph.Neighbors(2), "key not found"); |
| } |
| |
| TEST(WeightedGraph, NonExistentEdge) { |
| WeightedGraph<int> graph; |
| graph.AddVertex(0, 1.0); |
| graph.AddVertex(1, 2.0); |
| graph.AddEdge(0, 1, 0.5); |
| |
| // Default value for non-existent edges is 0. |
| EXPECT_EQ(graph.EdgeWeight(2, 3), 0); |
| } |
| |
| } // namespace internal |
| } // namespace ceres |