public void CreateInstancesPrintsMessageIfItCannotOpenFolder()
{
TestUtils.CheckOutput(
action: () =>
{
// Call CreateInstanceSeedFilesFromDirectory with a non existant directory path.
try
{
InstanceSeedFile.CreateInstanceSeedFilesFromDirectory(
"foobarFolder",
InstanceSeedFileTest.ValidInstanceExtensions,
1,
42);
}
catch (DirectoryNotFoundException)
{
// This is expected.
}
},
check: consoleOutput =>
{
// Check that information about it is written to console.
var reader = new StringReader(consoleOutput.ToString());
reader.ReadLine().ShouldContain("foobarFolder");
reader.ReadLine().ShouldBe("Cannot open instance directory foobarFolder!");
});
}
public void CreateInstancesThrowsExceptionIfItCannotOpenFolder()
{
Exception exception =
Assert.Throws <DirectoryNotFoundException>(
() =>
{
InstanceSeedFile.CreateInstanceSeedFilesFromDirectory(
"foobarFolder",
InstanceSeedFileTest.ValidInstanceExtensions,
1,
42);
});
}
public void CreateInstancesIgnoresNonValidFiles()
{
// Call method.
var instances = InstanceSeedFile.CreateInstanceSeedFilesFromDirectory(
this._pathToTestInstanceFolder,
InstanceSeedFileTest.ValidInstanceExtensions,
1,
42);
// Check that no non valid file has been translated into an instance.
var instancePaths = instances.Select(instance => instance.Path);
instancePaths.Any(path => InstanceSeedFileTest.NonValidFileNames.Any(path.Contains))
.ShouldBeFalse("Not all non valid files have been ignored.");
}
public void CreateInstancesCorrectlyExtractsPathsToValidFiles()
{
// Call method.
var instances = InstanceSeedFile.CreateInstanceSeedFilesFromDirectory(
this._pathToTestInstanceFolder,
InstanceSeedFileTest.ValidInstanceExtensions,
1,
42);
// Check that file names of instances match the complete paths of all valid files.
var expectedPaths = InstanceSeedFileTest.ValidFileNames
.Select(name => this._pathToTestInstanceFolder + Path.DirectorySeparatorChar + name).ToList();
var instancePaths = instances.Select(instance => instance.Path).ToList();
expectedPaths.ShouldBe(
instancePaths,
true,
$"{TestUtils.PrintList(instancePaths)} should have been equal to {TestUtils.PrintList(expectedPaths)}.");
}
BuildLingelingAlgorithmTuner(
AlgorithmTunerConfiguration tunerConfig,
string trainingInstanceFolder,
string testInstanceFolder,
LingelingRunnerConfiguration runnerConfig)
{
IRunEvaluator <InstanceSeedFile, RuntimeResult> runEvaluator;
if (runnerConfig.FactorParK == 0)
{
runEvaluator = new SortByUnpenalizedRuntime <InstanceSeedFile>(tunerConfig.CpuTimeout);
}
else
{
runEvaluator = new SortByPenalizedRuntime <InstanceSeedFile>(runnerConfig.FactorParK, tunerConfig.CpuTimeout);
}
var tuner = new AlgorithmTuner <LingelingRunner, InstanceSeedFile, RuntimeResult, TLearnerModel,
TPredictorModel,
TSamplingStrategy>(
targetAlgorithmFactory: new LingelingRunnerFactory(runnerConfig.PathToExecutable, tunerConfig, runnerConfig.MemoryLimitMegabyte),
runEvaluator: runEvaluator,
trainingInstances: InstanceSeedFile.CreateInstanceSeedFilesFromDirectory(
trainingInstanceFolder,
LingelingUtils.ListOfValidFileExtensions,
runnerConfig.NumberOfSeeds,
runnerConfig.RngSeed),
parameterTree: LingelingUtils.CreateParameterTree(),
configuration: tunerConfig);
if (!string.IsNullOrWhiteSpace(testInstanceFolder))
{
tuner.SetTestInstances(
InstanceSeedFile.CreateInstanceSeedFilesFromDirectory(
testInstanceFolder,
LingelingUtils.ListOfValidFileExtensions,
runnerConfig.NumberOfSeeds,
runnerConfig.RngSeed));
}
return(tuner);
}
/// <summary>
/// Builds an instance of the <see cref="AlgorithmTuner{TTargetAlorithm,TInstance,TResult}" /> class for tuning Gurobi.
/// </summary>
/// <param name="tunerConfig">The <see cref="AlgorithmTunerConfiguration" /> to use.</param>
/// <param name="pathToTrainingInstanceFolder">The path to the folder containing training instances.</param>
/// <param name="pathToTestInstanceFolder">The path to test instance folder.</param>
/// <param name="gurobiConfigBuilder">The gurobi configuration builder.</param>
/// <returns>
/// The built instance.
/// </returns>
public static AlgorithmTuner <GurobiRunner, InstanceSeedFile, GurobiResult> BuildGurobiRunner(
AlgorithmTunerConfiguration tunerConfig,
string pathToTrainingInstanceFolder,
string pathToTestInstanceFolder,
GurobiRunnerConfiguration.GurobiRunnerConfigBuilder gurobiConfigBuilder)
{
var gurobiConfig = Program.BuildGurobiConfigAndCheckThreadCount(gurobiConfigBuilder, tunerConfig);
var tuner = new AlgorithmTuner <GurobiRunner, InstanceSeedFile, GurobiResult>(
targetAlgorithmFactory: new GurobiRunnerFactory(gurobiConfig, tunerConfig),
runEvaluator: new GurobiRunEvaluator(tunerConfig.CpuTimeout),
trainingInstances: InstanceSeedFile.CreateInstanceSeedFilesFromDirectory(
pathToTrainingInstanceFolder,
GurobiUtils.ListOfValidFileExtensions,
gurobiConfig.NumberOfSeeds,
gurobiConfig.RngSeed),
parameterTree: GurobiUtils.CreateParameterTree(),
configuration: tunerConfig,
customGrayBoxMethods: new GurobiGrayBoxMethods());
try
{
if (!string.IsNullOrWhiteSpace(pathToTestInstanceFolder))
{
var testInstances = InstanceSeedFile.CreateInstanceSeedFilesFromDirectory(
pathToTestInstanceFolder,
GurobiUtils.ListOfValidFileExtensions,
gurobiConfig.NumberOfSeeds,
gurobiConfig.RngSeed);
tuner.SetTestInstances(testInstances);
}
}
catch
{
}
return(tuner);
}