refactor: move test_helpers, RunningQuality

google-tests/test_helpers.h

@@ -0,0 +1,33 @@
+//
+// Created by david on 11.03.2026.
+//
+
+#ifndef PASADASUPERPROJECT_TEST_HELPERS_H
+#define PASADASUPERPROJECT_TEST_HELPERS_H
+
+#include "npy.hpp"
+#include "ssf_filter.h"
+#include <string>
+#include <vector>
+
+template <typename T> static std::vector<double> apply_filter(T& filter, std::vector<double>& x) {
+    std::vector<double> y;
+    y.resize(x.size());
+    for (int i = 0; i < x.size(); i++) {
+        y[i] = filter.filter(x[i]);
+    }
+    return y;
+}
+
+void npy_save(std::string path, std::vector<double>& x);
+
+std::vector<double> fetch_y_axis(npy::npy_data<double>& acc);
+
+/** Returns the ssf_threshold as the filter output for debugging. */
+class DebugSsfStepDetectorThreshold : public SsfStepDetector {
+public:
+    DebugSsfStepDetectorThreshold(size_t len_refr);
+    double filter(double val);
+};
+
+#endif //PASADASUPERPROJECT_TEST_HELPERS_H