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** This file is part of the test suite of Qt for Python.
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#include "testtoposort.h"
#include <QtTest/QTest>
#include "graph.h"
#include <QDebug>

void TestTopoSort::testTopoSort()
{
    QLinkedList<int> result;
    {
        Graph g(3);
        g.addEdge(1, 2);
        g.addEdge(0, 1);
        result = g.topologicalSort();
        QCOMPARE(result.size(), 3);
        QLinkedList<int>::iterator it = result.begin();
        QCOMPARE(*it, 0);
        QCOMPARE(*(++it), 1);
        QCOMPARE(*(++it), 2);
    }
    {
        Graph g(2);
        result = g.topologicalSort();
        QCOMPARE(result.size(), 2);
        QLinkedList<int>::iterator it = result.begin();
        QCOMPARE(*it, 1);
        QCOMPARE(*(++it), 0);
    }
}

void TestTopoSort::testCiclicGraph()
{
    Graph g(3);
    g.addEdge(0, 1);
    g.addEdge(1, 2);
    g.addEdge(2, 0);
    QLinkedList<int> result = g.topologicalSort();
    QVERIFY(result.isEmpty());
}

QTEST_APPLESS_MAIN(TestTopoSort)

