Andrew de los Reyes | 81ebcd8 | 2010-03-09 15:56:18 -0800 | [diff] [blame^] | 1 | // Copyright (c) 2010 The Chromium OS Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include <utility> |
| 6 | #include <gtest/gtest.h> |
| 7 | #include "chromeos/obsolete_logging.h" |
| 8 | #include "update_engine/graph_types.h" |
| 9 | #include "update_engine/tarjan.h" |
| 10 | #include "update_engine/utils.h" |
| 11 | |
| 12 | using std::make_pair; |
| 13 | using std::pair; |
| 14 | using std::set; |
| 15 | using std::string; |
| 16 | using std::vector; |
| 17 | |
| 18 | namespace chromeos_update_engine { |
| 19 | |
| 20 | class TarjanAlgorithmTest : public ::testing::Test {}; |
| 21 | |
| 22 | TEST(TarjanAlgorithmTest, SimpleTest) { |
| 23 | const Vertex::Index n_a = 0; |
| 24 | const Vertex::Index n_b = 1; |
| 25 | const Vertex::Index n_c = 2; |
| 26 | const Vertex::Index n_d = 3; |
| 27 | const Vertex::Index n_e = 4; |
| 28 | const Vertex::Index n_f = 5; |
| 29 | const Vertex::Index n_g = 6; |
| 30 | const Vertex::Index n_h = 7; |
| 31 | const Graph::size_type kNodeCount = 8; |
| 32 | |
| 33 | Graph graph(kNodeCount); |
| 34 | |
| 35 | graph[n_a].out_edges.insert(make_pair(n_e, EdgeProperties())); |
| 36 | graph[n_a].out_edges.insert(make_pair(n_f, EdgeProperties())); |
| 37 | graph[n_b].out_edges.insert(make_pair(n_a, EdgeProperties())); |
| 38 | graph[n_c].out_edges.insert(make_pair(n_d, EdgeProperties())); |
| 39 | graph[n_d].out_edges.insert(make_pair(n_e, EdgeProperties())); |
| 40 | graph[n_d].out_edges.insert(make_pair(n_f, EdgeProperties())); |
| 41 | graph[n_e].out_edges.insert(make_pair(n_b, EdgeProperties())); |
| 42 | graph[n_e].out_edges.insert(make_pair(n_c, EdgeProperties())); |
| 43 | graph[n_e].out_edges.insert(make_pair(n_f, EdgeProperties())); |
| 44 | graph[n_f].out_edges.insert(make_pair(n_g, EdgeProperties())); |
| 45 | graph[n_g].out_edges.insert(make_pair(n_h, EdgeProperties())); |
| 46 | graph[n_h].out_edges.insert(make_pair(n_g, EdgeProperties())); |
| 47 | |
| 48 | TarjanAlgorithm tarjan; |
| 49 | |
| 50 | for (Vertex::Index i = n_a; i <= n_e; i++) { |
| 51 | vector<Vertex::Index> vertex_indexes; |
| 52 | tarjan.Execute(i, &graph, &vertex_indexes); |
| 53 | |
| 54 | EXPECT_EQ(5, vertex_indexes.size()); |
| 55 | EXPECT_TRUE(utils::VectorContainsValue(vertex_indexes, n_a)); |
| 56 | EXPECT_TRUE(utils::VectorContainsValue(vertex_indexes, n_b)); |
| 57 | EXPECT_TRUE(utils::VectorContainsValue(vertex_indexes, n_c)); |
| 58 | EXPECT_TRUE(utils::VectorContainsValue(vertex_indexes, n_d)); |
| 59 | EXPECT_TRUE(utils::VectorContainsValue(vertex_indexes, n_e)); |
| 60 | } |
| 61 | |
| 62 | { |
| 63 | vector<Vertex::Index> vertex_indexes; |
| 64 | tarjan.Execute(n_f, &graph, &vertex_indexes); |
| 65 | |
| 66 | EXPECT_EQ(1, vertex_indexes.size()); |
| 67 | EXPECT_TRUE(utils::VectorContainsValue(vertex_indexes, n_f)); |
| 68 | } |
| 69 | |
| 70 | for (Vertex::Index i = n_g; i <= n_h; i++) { |
| 71 | vector<Vertex::Index> vertex_indexes; |
| 72 | tarjan.Execute(i, &graph, &vertex_indexes); |
| 73 | |
| 74 | EXPECT_EQ(2, vertex_indexes.size()); |
| 75 | EXPECT_TRUE(utils::VectorContainsValue(vertex_indexes, n_g)); |
| 76 | EXPECT_TRUE(utils::VectorContainsValue(vertex_indexes, n_h)); |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | } // namespace chromeos_update_engine |