A printable variant for QtTest

PrintableVariant.cpp

// Usage: QCOMPARE(PrintableVariant(v1), PrintableVariant(v2));
// Note, QTest will still limit output to 1024 chars in QTestResult::compare

class PrintableVariant : public QVariant {
public: PrintableVariant(const QVariant &other) : QVariant(other) { }
};

namespace QTest {
    template<> char *toString(const PrintableVariant &variant){
        QString string;
        QDebug debug(&string);
        debug << variant;
        return qstrdup(string.toLocal8Bit());
    }
}