public StubPlatformFolder()
{
this.OnExists = () => true;
this.OnDelete = () => { };
this.OnGetFiles = () => this.files;
this.OnCreateFile = name =>
{
var file = new StubPlatformFile(name);
this.files.Add(file);
return(file);
};
}
public StubPlatformFolder()
{
this.OnExists = () => true;
this.OnDelete = () => { };
this.OnGetFiles = () => this.files;
this.OnCreateFile = name =>
{
var file = new StubPlatformFile(name);
this.files.Add(file);
return file;
};
}
public void DoesNotCacheSameFilesTwiceWhenIvokedByMultipleThreads()
{
int numberOfGetFilesAsyncCalls = 0;
var returnFiles = new ManualResetEventSlim();
var files = new StubPlatformFile[] { CreateTransmissionFile(), CreateTransmissionFile() };
var folder = new StubPlatformFolder();
folder.OnGetFiles = () =>
{
numberOfGetFilesAsyncCalls += 1;
returnFiles.Wait();
return files;
};
var provider = new StubApplicationFolderProvider { OnGetApplicationFolder = () => folder };
var storage = new TransmissionStorage(provider);
Task<Transmission> dequeue1 = TaskEx.Run(() => storage.Dequeue());
Task<Transmission> dequeue2 = TaskEx.Run(() => storage.Dequeue());
returnFiles.Set();
TaskEx.WhenAll(dequeue1, dequeue2).GetAwaiter().GetResult();
Assert.Equal(2, numberOfGetFilesAsyncCalls); // 1 for initializing size and 1 for 1 dequeue
}
public void GetsMultipleFilesFromFolderOnceAndCachesThemToReduceDiskAccess()
{
int numberOfGetFilesAsyncCalls = 0;
var files = new StubPlatformFile[] { CreateTransmissionFile(), CreateTransmissionFile() };
var folder = new StubPlatformFolder();
folder.OnGetFiles = () =>
{
numberOfGetFilesAsyncCalls += 1;
return files;
};
var provider = new StubApplicationFolderProvider { OnGetApplicationFolder = () => folder };
var storage = new TransmissionStorage(provider);
Assert.NotNull(storage.Dequeue());
Assert.NotNull(storage.Dequeue());
Assert.Equal(2, numberOfGetFilesAsyncCalls); // 1 for initializing size and 1 for 1 dequeue
}
public void ReturnsFalseIfProcessHasNoRightToWriteToFilesInApplicationFolder()
{
var file = new StubPlatformFile { OnOpen = () => { throw new UnauthorizedAccessException(); } };
var folder = new StubPlatformFolder { OnCreateFile = name => file };
var provider = new StubApplicationFolderProvider { OnGetApplicationFolder = () => folder };
var storage = new TransmissionStorage(provider);
bool result = storage.Enqueue(() => new StubTransmission());
Assert.False(result);
}
public void HandlesFileNotFoundExceptionThrownWhenCalculatingSizeBecauseTransmissionHasAlreadyBeenDequeued()
{
var file = new StubPlatformFile();
file.OnGetName = () => "Dequeued" + TransmissionStorage.TransmissionFileExtension;
file.OnGetLength = () => { throw new FileNotFoundException(); };
StubPlatformFolder folder = CreateFolder(file);
var provider = new StubApplicationFolderProvider { OnGetApplicationFolder = () => folder };
var storage = new TransmissionStorage(provider);
bool transmissionEnqueued = storage.Enqueue(() => new StubTransmission());
Assert.True(transmissionEnqueued);
}
public void ClosesFileStreamToEnsureChangesAreCommittedToDisk()
{
bool fileStreamDisposed = false;
var fileStream = new StubStream { OnDispose = disposing => fileStreamDisposed = true };
var file = new StubPlatformFile { OnOpen = () => fileStream };
var folder = new StubPlatformFolder { OnCreateFile = fileName => file };
var provider = new StubApplicationFolderProvider { OnGetApplicationFolder = () => folder };
var storage = new TransmissionStorage(provider);
storage.Enqueue(() => new StubTransmission());
Assert.True(fileStreamDisposed);
}
public void SavesTransmissionToTheNewlyCreatedFile()
{
string writtenContents = null;
StubStream fileStream = new StubStream();
fileStream.OnDispose = disposing =>
{
writtenContents = Encoding.UTF8.GetString(fileStream.ToArray());
};
var file = new StubPlatformFile { OnOpen = () => fileStream };
var folder = new StubPlatformFolder { OnCreateFile = fileName => file };
var provider = new StubApplicationFolderProvider { OnGetApplicationFolder = () => folder };
var storage = new TransmissionStorage(provider);
byte[] contents = Encoding.UTF8.GetBytes(Path.GetRandomFileName());
var transmission = new StubTransmission(contents);
storage.Enqueue(() => transmission);
string encodedContent = writtenContents.Split(Environment.NewLine.ToCharArray()).Last();
Assert.Equal(contents, Convert.FromBase64String(encodedContent));
}