Details
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Bug
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Resolution: Cannot Reproduce
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Not Evaluated
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None
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4.8.2
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None
Description
In the following test case, the watchFiles() function will often hang when invoked on Windows as the QFileSystemWatcher::fileChanged() notification is not always emitted, though the file is modified after the watcher is created. I was not able to reproduce the problem on Mac or Linux.
void writeRandomDataToFile(const QString& path)
{
QFile file(path);
file.open(QIODevice::WriteOnly);
QByteArray data;
for (int i=0; i < 50; i++) {
data.append(qrand());
}
file.write(data);
file.close();
}
void watchFiles()
{
QString testPath = "test-path.txt";
writeRandomDataToFile(testPath);
for (int i=0; i < 100; i++) {
QFileSystemWatcher watcher;
QSignalSpy spy(&watcher, SIGNAL(fileChanged(QString)));
watcher.addPath(testPath);
writeRandomDataToFile(testPath);
while (spy.isEmpty()) {
QCoreApplication::processEvents();
}
}
}