qt-everywhere-src-5.14.1/qtandroidextras/tests/auto/qandroidjnienvironment/tst_qandroidjnienvironment.cpp

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** This file is part of the test suite of the Qt Toolkit.
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#include <QtTest/QtTest>
#include <QtAndroidExtras/QAndroidJniEnvironment>
#include <QtCore/private/qjnihelpers_p.h>

class tst_QAndroidJniEnvironment : public QObject
{
    Q_OBJECT

private slots:
    void jniEnv();
    void javaVM();
};

void tst_QAndroidJniEnvironment::jniEnv()
{
    JavaVM *javaVM = QtAndroidPrivate::javaVM();
    QVERIFY(javaVM);

    {
        QAndroidJniEnvironment env;

        // JNI environment should now be attached to the current thread
        JNIEnv *jni = 0;
        QCOMPARE(javaVM->GetEnv((void**)&jni, JNI_VERSION_1_6), JNI_OK);

        JNIEnv *e = env;
        QVERIFY(e);

        QCOMPARE(env->GetVersion(), JNI_VERSION_1_6);

        // try to find an existing class
        QVERIFY(env->FindClass("java/lang/Object"));
        QVERIFY(!env->ExceptionCheck());

        // try to find a nonexistent class
        QVERIFY(!env->FindClass("this/doesnt/Exist"));
        QVERIFY(env->ExceptionCheck());
        env->ExceptionClear();
    }

    // The env does not detach automatically, even if it goes out of scope. The only way it can
    // be detached is if it's done explicitly, or if the thread we attached to gets killed (TLS clean-up).
    JNIEnv *jni = nullptr;
    QCOMPARE(javaVM->GetEnv((void**)&jni, JNI_VERSION_1_6), JNI_OK);
}

void tst_QAndroidJniEnvironment::javaVM()
{
    JavaVM *javaVM = QtAndroidPrivate::javaVM();
    QVERIFY(javaVM);

    QAndroidJniEnvironment env;
    QCOMPARE(env.javaVM(), javaVM);

    JavaVM *vm = 0;
    QCOMPARE(env->GetJavaVM(&vm), JNI_OK);
    QCOMPARE(env.javaVM(), vm);
}

QTEST_APPLESS_MAIN(tst_QAndroidJniEnvironment)

#include "tst_qandroidjnienvironment.moc"