141 lines
4.1 KiB
C++
141 lines
4.1 KiB
C++
// Copyright 2010-2025 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/sat/primary_variables.h"
|
|
|
|
#include <cstdint>
|
|
#include <vector>
|
|
|
|
#include "gtest/gtest.h"
|
|
#include "ortools/base/gmock.h"
|
|
#include "ortools/base/parse_test_proto.h"
|
|
|
|
namespace operations_research {
|
|
namespace sat {
|
|
namespace {
|
|
|
|
using ::google::protobuf::contrib::parse_proto::ParseTestProto;
|
|
using ::testing::Contains;
|
|
using ::testing::ElementsAre;
|
|
using ::testing::EqualsProto;
|
|
using ::testing::Pair;
|
|
|
|
TEST(PrimaryVariablesTest, BasicExample) {
|
|
const CpModelProto model = ParseTestProto(R"pb(
|
|
variables { domain: [ -10, 10 ] }
|
|
variables { domain: [ 0, 10 ] }
|
|
variables { domain: [ 0, 10 ] }
|
|
variables { domain: [ 0, 10 ] }
|
|
variables { domain: [ 0, 10 ] }
|
|
variables { domain: [ 0, 10 ] }
|
|
variables { domain: [ -100, 10 ] }
|
|
constraints {
|
|
linear {
|
|
vars: [ 0, 1, 2, 4 ]
|
|
coeffs: [ 1, 1, 1, 2 ]
|
|
domain: [ 0, 0 ]
|
|
}
|
|
}
|
|
constraints {
|
|
lin_max {
|
|
target {
|
|
vars: [ 5 ]
|
|
coeffs: [ 1 ]
|
|
}
|
|
exprs {
|
|
vars: [ 1 ]
|
|
coeffs: [ 1 ]
|
|
}
|
|
exprs {
|
|
vars: [ 3 ]
|
|
coeffs: [ 1 ]
|
|
}
|
|
}
|
|
}
|
|
constraints {
|
|
linear {
|
|
vars: [ 0, 1, 2 ]
|
|
coeffs: [ 1, 1, 2 ]
|
|
domain: [ 0, 0 ]
|
|
}
|
|
}
|
|
constraints {
|
|
linear {
|
|
vars: [ 5, 6 ]
|
|
coeffs: [ 1, 1 ]
|
|
domain: [ 0, 0 ]
|
|
}
|
|
}
|
|
)pb");
|
|
const VariableRelationships relationships =
|
|
ComputeVariableRelationships(model);
|
|
EXPECT_GT(relationships.secondary_variables.size(), 1);
|
|
EXPECT_THAT(relationships.variable_dependencies, Contains(Pair(6, 5)));
|
|
const std::vector<int64_t> solution = {-1, 1, 0, 4, 0, 4, -4};
|
|
|
|
std::vector<int64_t> all_variables = solution;
|
|
for (const int var : relationships.secondary_variables) {
|
|
all_variables[var] = -999999;
|
|
}
|
|
EXPECT_TRUE(ComputeAllVariablesFromPrimaryVariables(model, relationships,
|
|
&all_variables));
|
|
EXPECT_EQ(all_variables, solution);
|
|
}
|
|
|
|
TEST(PrimaryVariablesTest, WithIntProd) {
|
|
const CpModelProto model = ParseTestProto(R"pb(
|
|
variables { domain: [ -10, 10 ] }
|
|
variables { domain: [ -10, 10 ] }
|
|
constraints {
|
|
int_prod {
|
|
target { vars: 0 coeffs: 1 offset: -6 }
|
|
exprs { vars: 1 coeffs: 3 offset: 1 }
|
|
}
|
|
}
|
|
)pb");
|
|
const VariableRelationships relationships =
|
|
ComputeVariableRelationships(model);
|
|
const std::vector<int64_t> solution = {10, 1};
|
|
|
|
std::vector<int64_t> all_variables = solution;
|
|
for (const int var : relationships.secondary_variables) {
|
|
all_variables[var] = -999999;
|
|
}
|
|
EXPECT_TRUE(ComputeAllVariablesFromPrimaryVariables(model, relationships,
|
|
&all_variables));
|
|
EXPECT_EQ(all_variables, solution);
|
|
}
|
|
|
|
TEST(PrimaryVariablesTest, WithExactlyOne) {
|
|
const CpModelProto model = ParseTestProto(R"pb(
|
|
variables { domain: [ 0, 1 ] }
|
|
variables { domain: [ 0, 1 ] }
|
|
variables { domain: [ 0, 1 ] }
|
|
variables { domain: [ 0, 1 ] }
|
|
variables { domain: [ 0, 1 ] }
|
|
constraints { exactly_one { literals: [ 0, 1, 2, 3 ] } }
|
|
)pb");
|
|
const VariableRelationships relationships =
|
|
ComputeVariableRelationships(model);
|
|
EXPECT_EQ(relationships.secondary_variables.size(), 1);
|
|
const ConstraintProto expected = ParseTestProto(R"pb(
|
|
exactly_one { literals: [ 0, 1, 2, 3 ] }
|
|
)pb");
|
|
EXPECT_THAT(relationships.dependency_resolution_constraint,
|
|
ElementsAre(EqualsProto(expected)));
|
|
}
|
|
|
|
} // namespace
|
|
} // namespace sat
|
|
} // namespace operations_research
|