public void DeserializeCache_FromSerializedCache_CacheIsCorrect()
{
//Arrange
List <FileSystemItem> items = new List <FileSystemItem>
{
new FileSystemItem("name1", "folder1"),
new FileSystemItem("C:\\")
};
DateTime dateTime = DateTime.Now;
FileSystemCache cache = new FileSystemCache(items, dateTime);
_serializer.SerializeCache(cache);
//Act
FileSystemCache actualCache = _serializer.DeserializeCache();
//Assert
//Serialization does not preserve milliseconds, so we use epsilon check.
Assert.That(dateTime - actualCache.LastFullScanTime, Is.LessThan(new TimeSpan(0, 0, 1)));
Assert.That(actualCache.Items.Count, Is.EqualTo(2));
Assert.That(actualCache.Items[0].FullPath, Is.EqualTo(Path.GetFullPath("folder1")));
Assert.That(actualCache.Items[0].Name, Is.EqualTo("name1"));
Assert.That(actualCache.Items[1].FullPath, Is.EqualTo(Path.GetFullPath("C:\\")));
Assert.That(actualCache.Items[1].Name, Is.EqualTo(""));
}
private List <FileSystemItem> ReadCache(bool appRunOnStartup, out bool fullCacheUpToDate, out bool cacheFolderCreated, out DateTime lastFullScanTime)
{
cacheFolderCreated = false;
//Parse file system
FileSystemCache fullCache = _cacheSerializer.DeserializeCache();
if (fullCache != null)
{
//The cache file can be up to date only if the current Navigation Assistant has been run on startup
//and if it had been closed just on system shutdown and the current parser is created at application start.
//In this case no additional folders can be created during NavAssistant being inactive.
fullCacheUpToDate = CacheUpToDate(fullCache) && appRunOnStartup;
}
else
{
//The application is loaded for the first time (no cache stored on disk).
string cacheFolder = GetCacheFolder();
bool cacheFolderExisted = Directory.Exists(cacheFolder);
//Run this method in the main thread, thus freezing it.
//Don't set any restrictions on this parsing, as want to grab the entire system.
fullCache = new FileSystemCache(_fileSystemParser.GetSubFolders(), DateTime.Now);
_cacheSerializer.SerializeCache(fullCache);
//Updating the cache if cache folder has been created
bool cacheFolderExists = Directory.Exists(cacheFolder);
cacheFolderCreated = !cacheFolderExisted && cacheFolderExists;
fullCacheUpToDate = true;
}
List <FileSystemItem> filteredCache = FilterCache(fullCache);
lastFullScanTime = fullCache.LastFullScanTime;
fullCache = null;
GC.Collect();
return(filteredCache);
}