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#include <qdebug.h>
#include <QtTest/QtTest>

#include <qglobal.h>

class tst_QGetPutEnv : public QObject
{
Q_OBJECT
private slots:
    void getSetCheck();
    void intValue_data();
    void intValue();
};

void tst_QGetPutEnv::getSetCheck()
{
    const char varName[] = "should_not_exist";

    bool ok;

    QVERIFY(!qEnvironmentVariableIsSet(varName));
    QVERIFY(qEnvironmentVariableIsEmpty(varName));
    ok = true;
    QCOMPARE(qEnvironmentVariableIntValue(varName), 0);
    QCOMPARE(qEnvironmentVariableIntValue(varName, &ok), 0);
    QVERIFY(!ok);
    QByteArray result = qgetenv(varName);
    QCOMPARE(result, QByteArray());

#ifndef Q_OS_WIN
    QVERIFY(qputenv(varName, "")); // deletes varName instead of making it empty, on Windows

    QVERIFY(qEnvironmentVariableIsSet(varName));
    QVERIFY(qEnvironmentVariableIsEmpty(varName));
    ok = true;
    QCOMPARE(qEnvironmentVariableIntValue(varName), 0);
    QCOMPARE(qEnvironmentVariableIntValue(varName, &ok), 0);
    QVERIFY(!ok);
#endif

    QVERIFY(qputenv(varName, QByteArray("supervalue")));

    QVERIFY(qEnvironmentVariableIsSet(varName));
    QVERIFY(!qEnvironmentVariableIsEmpty(varName));
    ok = true;
    QCOMPARE(qEnvironmentVariableIntValue(varName), 0);
    QCOMPARE(qEnvironmentVariableIntValue(varName, &ok), 0);
    QVERIFY(!ok);
    result = qgetenv(varName);
    QCOMPARE(result, QByteArrayLiteral("supervalue"));

    qputenv(varName,QByteArray());

    // Now test qunsetenv
    QVERIFY(qunsetenv(varName));
    QVERIFY(!qEnvironmentVariableIsSet(varName));
    QVERIFY(qEnvironmentVariableIsEmpty(varName));
    ok = true;
    QCOMPARE(qEnvironmentVariableIntValue(varName), 0);
    QCOMPARE(qEnvironmentVariableIntValue(varName, &ok), 0);
    QVERIFY(!ok);
    result = qgetenv(varName);
    QCOMPARE(result, QByteArray());
}

void tst_QGetPutEnv::intValue_data()
{
    QTest::addColumn<QByteArray>("value");
    QTest::addColumn<int>("expected");
    QTest::addColumn<bool>("ok");

    // most non-success cases already tested in getSetCheck()

#define ROW(x, i, b) \
    QTest::newRow(#x) << QByteArray(#x) << (i) << (b)
    ROW(auto, 0, false);
    ROW(0, 0, true);
    ROW(1, 1, true);
    ROW(010, 8, true);
    ROW(0x10, 16, true);
    ROW(-1, -1, true);
    ROW(-010, -8, true);
    // ROW(0xffffffff, -1, true); // could be expected, but not how QByteArray::toInt() works
    ROW(0xffffffff, 0, false);
    const int bases[] = {10, 8, 16};
    for (size_t i = 0; i < sizeof bases / sizeof *bases; ++i) {
        QTest::newRow(qPrintable(QString::asprintf("INT_MAX, base %d", bases[i])))
                << QByteArray::number(INT_MAX) << INT_MAX << true;
        QTest::newRow(qPrintable(QString::asprintf("INT_MAX+1, base %d", bases[i])))
                << QByteArray::number(qlonglong(INT_MAX) + 1) << 0 << false;
        QTest::newRow(qPrintable(QString::asprintf("INT_MIN, base %d", bases[i])))
                << QByteArray::number(INT_MIN) << INT_MIN << true;
        QTest::newRow(qPrintable(QString::asprintf("INT_MIN-1, base %d", bases[i])))
                << QByteArray::number(qlonglong(INT_MIN) - 1) << 0 << false;
    };
}

void tst_QGetPutEnv::intValue()
{
    const char varName[] = "should_not_exist";

    QFETCH(QByteArray, value);
    QFETCH(int, expected);
    QFETCH(bool, ok);

    bool actualOk = !ok;

    QVERIFY(qputenv(varName, value));
    QCOMPARE(qEnvironmentVariableIntValue(varName), expected);
    QCOMPARE(qEnvironmentVariableIntValue(varName, &actualOk), expected);
    QCOMPARE(actualOk, ok);
}

QTEST_MAIN(tst_QGetPutEnv)
#include "tst_qgetputenv.moc"