view base/test/TestMovingMedian.h @ 1881:b504df98c3be

Ensure completion on output model is started at zero, so if it's checked before the input model has become ready and the transform has begun, it is not accidentally reported as complete (affected re-aligning models in Sonic Lineup when replacing the session)

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#ifndef TEST_MOVING_MEDIAN_H
#define TEST_MOVING_MEDIAN_H

#include "../MovingMedian.h"

#include <QObject>
#include <QtTest>
#include <QDir>

#include <iostream>

using namespace std;

class TestMovingMedian : public QObject
{
    Q_OBJECT

    template <typename T>
    void checkExpected(const vector<T> &output,
                       const vector<T> &expected) {
        if (output.size() != expected.size()) {
            std::cerr << "ERROR: output array size " << output.size()
                      << " differs from expected size " << expected.size()
                      << std::endl;
        }
        for (int i = 0; i < int(output.size()); ++i) {
            if (output[i] != expected[i]) {
                std::cerr << "ERROR: Value at index " << i
                          << " in output array differs from expected"
                          << std::endl;
                std::cerr << "Output:   ";
                for (auto v: output) std::cerr << v << " ";
                std::cerr << "\nExpected: ";
                for (auto v: expected) std::cerr << v << " ";
                std::cerr << std::endl;
                break;
            }
        }
        QCOMPARE(output, expected);
    }

    template <typename T>
    void testFixed(int n,
                   const vector<T> &input,
                   const vector<T> &expected,
                   double percentile = 50.0) {
        vector<T> output;
        MovingMedian<T> mm(n, percentile);
        for (auto v: input) {
            mm.push(v);
            mm.checkIntegrity();
            output.push_back(mm.get());
        }
        mm.checkIntegrity();
        checkExpected<T>(output, expected);
    }

private slots:

    void empty() {
        MovingMedian<double> mm(3);
        QCOMPARE(mm.get(), 0.0);
    }
    
    void zeros() {
        vector<double> input { 0.0, 0.0, 0.0, 0.0, 0.0 };
        vector<double> expected { 0.0, 0.0, 0.0, 0.0, 0.0 };
        testFixed<double>(3, input, expected);
    }
    
    void ascending() {
        vector<double> input { 1.0, 2.0, 3.0, 4.0, 5.0 };
        vector<double> expected { 0.0, 1.0, 2.0, 3.0, 4.0 };
        testFixed<double>(3, input, expected);
    }

    void ascendingInt() {
        vector<int> input { 1, 2, 3, 4, 5 };
        vector<int> expected { 0, 1, 2, 3, 4 };
        testFixed<int>(3, input, expected);
    }

    void descending() {
        vector<double> input { 5.0, 4.0, 3.0, 2.0, 1.0 };
        vector<double> expected { 0.0, 4.0, 4.0, 3.0, 2.0 };
        testFixed<double>(3, input, expected);
    }

    void descendingInt() {
        vector<int> input { 5, 4, 3, 2, 1 };
        vector<int> expected { 0, 4, 4, 3, 2 };
        testFixed<int>(3, input, expected);
    }

    void duplicates() {
        vector<double> input { 2.0, 2.0, 3.0, 4.0, 3.0 };
        vector<double> expected { 0.0, 2.0, 2.0, 3.0, 3.0 };
        testFixed<double>(3, input, expected);
    }
    
    void percentile10() {
        vector<double> input { 1.0, 2.0, 3.0, 4.0, 5.0 };
        vector<double> expected { 0.0, 0.0, 1.0, 2.0, 3.0 };
        testFixed<double>(3, input, expected, 10);
    }
    
    void percentile90() {
        vector<double> input { 1.0, 2.0, 3.0, 4.0, 5.0 };
        vector<double> expected { 1.0, 2.0, 3.0, 4.0, 5.0 };
        testFixed<double>(3, input, expected, 90);
    }

    void even() {
        vector<double> input { 5.0, 4.0, 3.0, 2.0, 1.0 };
        vector<double> expected { 0.0, 4.0, 4.0, 4.0, 3.0 };
        testFixed<double>(4, input, expected);
    }

    void growing() {
        vector<double> input { 2.0, 4.0, 3.0, 2.5, 2.5, 3.0, 1.0, 2.0, 1.0, 0.0 };
        vector<double> expected { 2.0, 4.0, 4.0, 3.0, 2.5, 2.5, 2.5, 2.5, 2.0, 1.0 };
        vector<double> output;
        MovingMedian<double> mm(1);
        for (int i = 0; i < int(input.size()); ++i) {
            // sizes 1, 1, 2, 2, 3, 3, 4, 4, 5, 5
            int sz = i/2 + 1;
            mm.resize(sz);
            QCOMPARE(mm.size(), sz);
            mm.push(input[i]);
            mm.checkIntegrity();
            output.push_back(mm.get());
        }
        mm.checkIntegrity();
        checkExpected<double>(output, expected);
    }
        
    void shrinking() {
        vector<double> input { 2.0, 4.0, 3.0, 2.5, 2.5, 3.0, 1.0, 2.0, 1.0, 0.0 };
        vector<double> expected { 0.0, 0.0, 3.0, 3.0, 2.5, 2.5, 3.0, 2.0, 1.0, 0.0 };
        vector<double> output;
        MovingMedian<double> mm(99);
        for (int i = 0; i < int(input.size()); ++i) {
            // sizes 5, 5, 4, 4, 3, 3, 2, 2, 1, 1
            int sz = 5 - i/2;
            mm.resize(sz);
            QCOMPARE(mm.size(), sz);
            mm.push(input[i]);
            mm.checkIntegrity();
            output.push_back(mm.get());
        }
        mm.checkIntegrity();
        checkExpected<double>(output, expected);
    }
};

#endif