81 lines
3.1 KiB
C++
81 lines
3.1 KiB
C++
// Copyright 2010-2022 Google LLC
|
|
// Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#include "ortools/graph/assignment.h"
|
|
|
|
#include <limits>
|
|
|
|
#include "gtest/gtest.h"
|
|
|
|
namespace operations_research {
|
|
|
|
TEST(SimpleLinearSumAssignmentTest, Empty) {
|
|
SimpleLinearSumAssignment assignment;
|
|
EXPECT_EQ(SimpleLinearSumAssignment::OPTIMAL, assignment.Solve());
|
|
EXPECT_EQ(0, assignment.OptimalCost());
|
|
EXPECT_EQ(0, assignment.NumArcs());
|
|
EXPECT_EQ(0, assignment.NumNodes());
|
|
}
|
|
|
|
TEST(SimpleLinearSumAssignmentTest, OptimumMatching) {
|
|
SimpleLinearSumAssignment assignment;
|
|
EXPECT_EQ(0, assignment.AddArcWithCost(0, 0, 0));
|
|
EXPECT_EQ(1, assignment.AddArcWithCost(0, 1, 2));
|
|
EXPECT_EQ(2, assignment.AddArcWithCost(1, 0, 3));
|
|
EXPECT_EQ(3, assignment.AddArcWithCost(1, 1, 4));
|
|
EXPECT_EQ(2, assignment.NumNodes());
|
|
EXPECT_EQ(4, assignment.NumArcs());
|
|
EXPECT_EQ(SimpleLinearSumAssignment::OPTIMAL, assignment.Solve());
|
|
EXPECT_EQ(4, assignment.OptimalCost());
|
|
EXPECT_EQ(0, assignment.RightMate(0));
|
|
EXPECT_EQ(0, assignment.AssignmentCost(0));
|
|
EXPECT_EQ(1, assignment.RightMate(1));
|
|
EXPECT_EQ(4, assignment.AssignmentCost(1));
|
|
}
|
|
|
|
TEST(SimpleLinearSumAssignmentTest, OptimumMatchingWithNegativeCost) {
|
|
SimpleLinearSumAssignment assignment;
|
|
assignment.AddArcWithCost(0, 0, 2);
|
|
assignment.AddArcWithCost(0, 1, -10);
|
|
assignment.AddArcWithCost(1, 0, 3);
|
|
assignment.AddArcWithCost(1, 1, -20);
|
|
EXPECT_EQ(SimpleLinearSumAssignment::OPTIMAL, assignment.Solve());
|
|
EXPECT_EQ(-18, assignment.OptimalCost());
|
|
EXPECT_EQ(0, assignment.RightMate(0));
|
|
EXPECT_EQ(2, assignment.AssignmentCost(0));
|
|
EXPECT_EQ(1, assignment.RightMate(1));
|
|
EXPECT_EQ(-20, assignment.AssignmentCost(1));
|
|
}
|
|
|
|
TEST(SimpleLinearSumAssignmentTest, InfeasibleProblem) {
|
|
SimpleLinearSumAssignment assignment;
|
|
assignment.AddArcWithCost(0, 1, 2);
|
|
assignment.AddArcWithCost(0, 1, -10);
|
|
assignment.AddArcWithCost(1, 1, 3);
|
|
assignment.AddArcWithCost(1, 1, -20);
|
|
EXPECT_EQ(SimpleLinearSumAssignment::INFEASIBLE, assignment.Solve());
|
|
EXPECT_EQ(0, assignment.OptimalCost());
|
|
}
|
|
|
|
TEST(SimpleLinearSumAssignmentTest, Overflow) {
|
|
SimpleLinearSumAssignment assignment;
|
|
assignment.AddArcWithCost(0, 0, std::numeric_limits<CostValue>::max());
|
|
assignment.AddArcWithCost(0, 1, std::numeric_limits<CostValue>::max());
|
|
assignment.AddArcWithCost(1, 0, std::numeric_limits<CostValue>::max());
|
|
assignment.AddArcWithCost(1, 1, std::numeric_limits<CostValue>::max());
|
|
EXPECT_EQ(SimpleLinearSumAssignment::POSSIBLE_OVERFLOW, assignment.Solve());
|
|
EXPECT_EQ(0, assignment.OptimalCost());
|
|
}
|
|
|
|
} // namespace operations_research
|