#include "system_metrics.h"
#include <QtTest>
#include <QDir>
#include <QFile>
#include <QTemporaryDir>
class SystemMetricsTest : public QObject {
    Q_OBJECT
private slots:
    void countersAndMissing() {
        QTemporaryDir root;
        auto put=[&](const QString& path,const QByteArray& value) { QFile f(root.path()+path); QVERIFY(f.open(QIODevice::WriteOnly)); f.write(value); };
        QDir().mkpath(root.path()+"/thermal/thermal_zone0");
        put("/stat","cpu 100 0 50 800 50 0 0 0 100 0\n");
        put("/meminfo","MemTotal: 1000 kB\nMemAvailable: 700 kB\n");
        put("/uptime","120.5 80\n");
        put("/thermal/thermal_zone0/type","soc-thermal\n");
        put("/thermal/thermal_zone0/temp","44370\n");
        vdi::SystemMetrics collector(root.path(),root.path()+"/thermal");
        auto sample=collector.sample();
        QVERIFY(sample["cpuPercent"].isNull());
        QCOMPARE(sample["memoryPercent"].toDouble(),30.0);
        QCOMPARE(sample["socTemperatureC"].toDouble(),44.37);
        QCOMPARE(sample["uptimeSeconds"].toDouble(),120.5);
        put("/stat","cpu 120 0 60 860 60 0 0 0 500 0\n");
        QCOMPARE(collector.sample()["cpuPercent"].toDouble(),30.0); // guest time is not counted twice
        QVERIFY(collector.sample()["cpuPercent"].isNull()); // no counter delta
        put("/stat","cpu 1 0 0 1 0 0 0 0\n");
        QVERIFY(collector.sample()["cpuPercent"].isNull()); // reboot/reset
        put("/stat","broken\n"); collector.sample();
        put("/stat","cpu 2 0 0 5 0 0 0 0\n");
        QVERIFY(collector.sample()["cpuPercent"].isNull());
        put("/meminfo","MemTotal: 100 kB\nMemAvailable: 101 kB\n");
        put("/uptime","nan\n");
        put("/thermal/thermal_zone0/type","gpu-thermal\n");
        sample=collector.sample();
        QVERIFY(sample["memoryPercent"].isNull());
        QVERIFY(sample["uptimeSeconds"].isNull());
        QVERIFY(sample["socTemperatureC"].isNull());
    }
    void unavailable() {
        vdi::SystemMetrics collector("/nonexistent/proc","/nonexistent/thermal");
        const auto sample=collector.sample();
        for (auto value : sample) QVERIFY(value.isNull());
    }
};
QTEST_GUILESS_MAIN(SystemMetricsTest)
#include "test_system_metrics.moc"