public void Test_Base_Classifier_training()
 {
     //arrange
     var distance = new ManhattanDistance();
     var classifier = new BasicClassifier(distance);
     string trainingPath = Path.Combine(TestContext.DeploymentDirectory, "digits", "trainingsample.csv");
     var trainingData = DataReader.ReadObservations(trainingPath);
     classifier.Train(trainingData);
     //act
     string labelResult = classifier.Predict(trainingData[0].Pixels);
     //assert
     Assert.IsFalse(string.IsNullOrEmpty(labelResult));
 }