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#include <cstdio>
#include "HCheckConfig.h"
#include "Highs.h"
#include "catch.hpp"
#include "io/FilereaderEms.h"
#include "io/HMPSIO.h"
#include "io/HMpsFF.h"
#include "io/HighsIO.h"
#include "lp_data/HighsLp.h"
#include "lp_data/HighsLpUtils.h"
const bool dev_run = false;
TEST_CASE("filereader-edge-cases", "[highs_filereader]") {
std::string model = "";
std::string model_file;
HighsStatus run_status;
HighsStatus return_status;
HighsStatus read_status;
// Switching off for debugging
const bool run_first_tests = true;
const bool test_garbage_mps = true;
const bool test_garbage_ems = true;
const bool test_garbage_lp = true;
Highs highs;
if (!dev_run) highs.setOptionValue("output_flag", false);
const HighsInfo& info = highs.getInfo();
if (run_first_tests) {
// Try to run HiGHS with default options. No model loaded so OK
run_status = highs.run();
REQUIRE(highs.getModelStatus() == HighsModelStatus::kModelEmpty);
REQUIRE(run_status == HighsStatus::kOk);
// Load a non-existent MPS file and try to run HiGHS
model = "";
model_file = std::string(HIGHS_DIR) + "/check/instances/" + model + ".mps";
return_status = highs.readModel(model_file);
REQUIRE(return_status == HighsStatus::kError);
run_status = highs.run();
REQUIRE(run_status == HighsStatus::kOk);
// Load a non-existent LP file and try to run HiGHS
model = "";
model_file = std::string(HIGHS_DIR) + "/check/instances/" + model + ".lp";
return_status = highs.readModel(model_file);
REQUIRE(return_status == HighsStatus::kError);
run_status = highs.run();
REQUIRE(run_status == HighsStatus::kOk);
// Load a non-supported file type and try to run HiGHS
model = "model";
model_file = std::string(HIGHS_DIR) + "/check/instances/" + model + ".xyz";
return_status = highs.readModel(model_file);
REQUIRE(return_status == HighsStatus::kError);
run_status = highs.run();
REQUIRE(run_status == HighsStatus::kOk);
// Load an LP file that does not end with a newline
model = "no-newline-eof";
model_file = std::string(HIGHS_DIR) + "/check/instances/" + model + ".lp";
return_status = highs.readModel(model_file);
REQUIRE(return_status == HighsStatus::kOk);
run_status = highs.run();
REQUIRE(run_status == HighsStatus::kOk);
// Load an existing MPS file and run HiGHS
model = "adlittle";
model_file = std::string(HIGHS_DIR) + "/check/instances/" + model + ".mps";
return_status = highs.readModel(model_file);
REQUIRE(return_status == HighsStatus::kOk);
run_status = highs.run();
REQUIRE(run_status == HighsStatus::kOk);
REQUIRE(info.simplex_iteration_count == 87);
model = "garbage";
if (test_garbage_mps) {
if (dev_run) printf("\ngarbage.mps\n");
model_file =
std::string(HIGHS_DIR) + "/check/instances/" + model + ".mps";
read_status = highs.readModel(model_file);
REQUIRE(read_status == HighsStatus::kError);
}
if (test_garbage_ems) {
if (dev_run) printf("\ngarbage.ems\n");
model_file =
std::string(HIGHS_DIR) + "/check/instances/" + model + ".ems";
read_status = highs.readModel(model_file);
REQUIRE(read_status == HighsStatus::kError);
}
if (test_garbage_lp) {
if (dev_run) printf("\ngarbage.lp\n");
model_file = std::string(HIGHS_DIR) + "/check/instances/" + model + ".lp";
read_status = highs.readModel(model_file);
REQUIRE(read_status == HighsStatus::kError);
}
}
// blah blah not a good file
model = "1448";
if (dev_run) printf("\n%s.mps\n", model.c_str());
model_file = std::string(HIGHS_DIR) + "/check/instances/" + model + ".lp";
read_status = highs.readModel(model_file);
REQUIRE(read_status == HighsStatus::kError);
// Gurobi cannot read
//
// Minimize a subject to a >= 1 bounds a <= 0
model = "1449a";
if (dev_run) printf("\n%s.mps\n", model.c_str());
model_file = std::string(HIGHS_DIR) + "/check/instances/" + model + ".lp";
read_status = highs.readModel(model_file);
REQUIRE(read_status == HighsStatus::kError);
// Gurobi can read
//
// Minimize a subject to a >= 1
//
// However, requiring "end" checks for file corruption
model = "1449b";
if (dev_run) printf("\n%s.mps\n", model.c_str());
model_file = std::string(HIGHS_DIR) + "/check/instances/" + model + ".lp";
read_status = highs.readModel(model_file);
REQUIRE(read_status == HighsStatus::kError);
model = "1451";
if (dev_run) printf("\n%s.lp\n", model.c_str());
model_file = std::string(HIGHS_DIR) + "/check/instances/" + model + ".lp";
read_status = highs.readModel(model_file);
REQUIRE(read_status == HighsStatus::kOk);
run_status = highs.run();
REQUIRE(run_status == HighsStatus::kOk);
REQUIRE(highs.getModelStatus() == HighsModelStatus::kOptimal);
REQUIRE(highs.getInfo().objective_function_value == 2);
}
void freeFixedModelTest(const std::string model_name) {
std::string filename;
filename = std::string(HIGHS_DIR) + "/check/instances/" + model_name + ".mps";
HighsStatus status;
Highs highs;
highs.setOptionValue("output_flag", dev_run);
status = highs.readModel(filename);
REQUIRE(status == HighsStatus::kOk);
HighsModel model_free = highs.getModel();
status = highs.setOptionValue("mps_parser_type_free", false);
REQUIRE(status == HighsStatus::kOk);
status = highs.readModel(filename);
REQUIRE(status == HighsStatus::kOk);
HighsModel model_fixed = highs.getModel();
bool are_the_same = model_free == model_fixed;
REQUIRE(are_the_same);
}
TEST_CASE("filereader-free-format-parser-qp", "[highs_filereader]") {
freeFixedModelTest("qjh");
freeFixedModelTest("qjh_quadobj");
// This test can't be used since fixed format reader can't handle
// QMATRIX section
//
// freeFixedModelTest("qjh_qmatrix");
}
TEST_CASE("filereader-free-format-parser-lp", "[highs_filereader]") {
std::string filename;
filename = std::string(HIGHS_DIR) + "/check/instances/adlittle.mps";
HighsStatus status;
Highs highs;
if (!dev_run) highs.setOptionValue("output_flag", false);
status = highs.readModel(filename);
REQUIRE(status == HighsStatus::kOk);
HighsLp lp_free = highs.getLp();
status = highs.setOptionValue("mps_parser_type_free", false);
REQUIRE(status == HighsStatus::kOk);
status = highs.readModel(filename);
REQUIRE(status == HighsStatus::kOk);
HighsLp lp_fixed = highs.getLp();
bool are_the_same = lp_free == lp_fixed;
REQUIRE(are_the_same);
}
// No commas in test case name.
TEST_CASE("filereader-read-mps-ems-lp", "[highs_filereader]") {
std::string filename;
filename = std::string(HIGHS_DIR) + "/check/instances/adlittle.mps";
HighsStatus status;
// Read mps
Highs highs;
if (!dev_run) highs.setOptionValue("output_flag", false);
status = highs.readModel(filename);
REQUIRE(status == HighsStatus::kOk);
HighsLp lp_mps = highs.getLp();
// Write lp
std::string filename_lp = "adlittle.lp";
status = highs.writeModel(filename_lp);
REQUIRE(status == HighsStatus::kOk);
/*
bool are_the_same;
// Write ems
std::string filename_ems = "adlittle.ems";
status = highs.writeModel(filename_ems);
REQUIRE(status == HighsStatus::kOk);
// Read ems and compare with mps
std::cout << "Reading " << filename_ems << std::endl;
status = highs.readModel(filename_ems);
REQUIRE(status == HighsStatus::kOk);
std::cout << "Compare LP from .ems and .mps" << std::endl;
are_the_same = lp_mps == highs.getLp();
REQUIRE(are_the_same);
std::remove(filename_ems.c_str());
*/
status = highs.run();
REQUIRE(status == HighsStatus::kOk);
const HighsInfo& info = highs.getInfo();
double mps_objective_function_value = info.objective_function_value;
// Read lp and compare objective with mps
if (dev_run) std::cout << "Reading " << filename_lp << std::endl;
status = highs.readModel(filename_lp);
REQUIRE(status == HighsStatus::kOk);
status = highs.run();
REQUIRE(status == HighsStatus::kOk);
double delta =
std::fabs(mps_objective_function_value - info.objective_function_value);
if (dev_run && delta)
printf("TestFilereader: LP-MPS |objective difference| of %g\n", delta);
REQUIRE(delta < 1e-8);
std::remove(filename_lp.c_str());
}
TEST_CASE("filereader-integrality-constraints", "[highs_filereader]") {
std::string filename;
filename = std::string(HIGHS_DIR) + "/check/instances/small_mip.mps";
// integer variables are COL03,COL04 so x[2], x[3].
const std::vector<HighsVarType> kIntegers{
HighsVarType::kContinuous, HighsVarType::kContinuous,
HighsVarType::kInteger, HighsVarType::kInteger,
HighsVarType::kContinuous, HighsVarType::kContinuous,
HighsVarType::kContinuous, HighsVarType::kContinuous};
HighsStatus status;
Highs highs;
if (!dev_run) highs.setOptionValue("output_flag", false);
status = highs.readModel(filename);
REQUIRE(status == HighsStatus::kOk);
HighsLp lp_free = highs.getLp();
REQUIRE((int)lp_free.integrality_.size() == lp_free.num_col_);
REQUIRE(lp_free.integrality_ == kIntegers);
// Read mps with fixed format parser.
status = highs.setOptionValue("mps_parser_type_free", false);
REQUIRE(status == HighsStatus::kOk);
status = highs.readModel(filename);
REQUIRE(status == HighsStatus::kOk);
HighsLp lp_fixed = highs.getLp();
REQUIRE((int)lp_fixed.integrality_.size() == lp_fixed.num_col_);
REQUIRE(lp_fixed.integrality_ == kIntegers);
bool are_the_same = lp_free == lp_fixed;
REQUIRE(are_the_same);
}
/*
TEST_CASE("filereader-nan", "[highs_filereader]") {
// Check that if
std::string model_file;
Highs highs;
highs.setOptionValue("output_flag", dev_run);
model_file = std::string(HIGHS_DIR) + "/check/instances/nan0.mps";
REQUIRE(highs.readModel(model_file) == HighsStatus::kError);
model_file = std::string(HIGHS_DIR) + "/check/instances/nan1.mps";
REQUIRE(highs.readModel(model_file) == HighsStatus::kError);
model_file = std::string(HIGHS_DIR) + "/check/instances/nan2.mps";
REQUIRE(highs.readModel(model_file) == HighsStatus::kError);
}
*/
TEST_CASE("filereader-fixed-integer", "[highs_filereader]") {
double objective_value;
const double optimal_objective_value = 0;
std::string model_file =
std::string(HIGHS_DIR) + "/check/instances/fixed-binary.lp";
Highs highs;
highs.setOptionValue("output_flag", dev_run);
REQUIRE(highs.readModel(model_file) == HighsStatus::kOk);
REQUIRE(highs.run() == HighsStatus::kOk);
objective_value = highs.getInfo().objective_function_value;
REQUIRE(objective_value == optimal_objective_value);
}
TEST_CASE("filereader-dD2e", "[highs_filereader]") {
// dD2e.mps is min -x1 - 2x2 with upper bounds 1.0D3 and 1.0d3
//
// If read correctly, the optimal objective value is -3000
double objective_value;
const double optimal_objective_value = -3000;
std::string model_file = std::string(HIGHS_DIR) + "/check/instances/dD2e.mps";
Highs highs;
highs.setOptionValue("output_flag", dev_run);
REQUIRE(highs.readModel(model_file) == HighsStatus::kOk);
REQUIRE(highs.run() == HighsStatus::kOk);
objective_value = highs.getInfo().objective_function_value;
REQUIRE(objective_value == optimal_objective_value);
}
// TEST_CASE("filereader-comment", "[highs_filereader]") {
// // Check that comments - either whole line with * in first column,
// // or rest of line following */$ are handled correctly
// const double optimal_objective_value = -4;
// std::string model_file =
// std::string(HIGHS_DIR) + "/check/instances/comment.mps";
// Highs highs;
// highs.setOptionValue("output_flag", dev_run);
// REQUIRE(highs.readModel(model_file) == HighsStatus::kOk);
// REQUIRE(highs.run() == HighsStatus::kOk);
// double objective_value = highs.getInfo().objective_function_value;
// REQUIRE(objective_value == optimal_objective_value);
// }
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