Refactor Tests and add BayesMetrics test

tests/TestUtils.h

@@ -0,0 +1,19 @@
+#ifndef TEST_UTILS_H
+#define TEST_UTILS_H
+#include <torch/torch.h>
+#include <string>
+#include <vector>
+#include <map>
+#include <tuple>
+#include "ArffFiles.h"
+#include "CPPFImdlp.h"
+using namespace std;
+
+bool file_exists(const std::string& name);
+pair<vector<mdlp::labels_t>, map<string, int>> discretize(vector<mdlp::samples_t>& X, mdlp::labels_t& y, vector<string> features);
+vector<mdlp::labels_t> discretizeDataset(vector<mdlp::samples_t>& X, mdlp::labels_t& y);
+tuple<vector<vector<int>>, vector<int>, vector<string>, string, map<string, vector<int>>> loadFile(const string& name);
+tuple<torch::Tensor, torch::Tensor, vector<string>, string, map<string, vector<int>>> loadDataset(const string& name, bool class_last, bool discretize_dataset);
+#endif //TEST_UTILS_H
+
+#