public void MakesSpaceAvailableForNextTransmission()
{
var storage = new TransmissionStorage(new StubApplicationFolderProvider())
{
Capacity = 1
};
storage.Enqueue(() => new Transmission(new Uri("any://address"), new byte[1], "any/content", "any/encoding"));
storage.Dequeue();
Assert.True(storage.Enqueue(() => new StubTransmission()));
}
public void SavesTransmissionFileAfterPreviousUnsuccessfullAttempt()
{
var storage = new TransmissionStorage {
Capacity = 0
};
storage.Initialize(new StubApplicationFolderProvider());
storage.Enqueue(() => new StubTransmission());
storage.Capacity = 1;
Assert.IsTrue(storage.Enqueue(() => new StubTransmission()));
}
public void DoesNotMakeMoreSpaceAvailableWhenTransmissionCouldNotBeDequeued()
{
var storage = new TransmissionStorage {
Capacity = 0
};
storage.Initialize(new StubApplicationFolderProvider());
storage.Enqueue(() => new StubTransmission());
storage.Dequeue();
Assert.IsFalse(storage.Enqueue(() => new StubTransmission()));
}
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();
storage.Initialize(provider);
byte[] contents = Encoding.UTF8.GetBytes(Path.GetRandomFileName());
var transmission = new StubTransmission(contents);
storage.Enqueue(() => transmission);
string encodedContent = writtenContents.Split(Environment.NewLine.ToCharArray()).Last();
AssertEx.AreEqual(contents, Convert.FromBase64String(encodedContent));
}
// Uncomment this integration test only during investigations.
// Create unit tests to test for specific error conditions it uncovers.
// [TestMethod]
public void IsThreadSafe()
{
const int NumberOfThreads = 16;
const int NumberOfFilesPerThread = 64;
var storage = new TransmissionStorage();
storage.Initialize(new ApplicationFolderProvider());
try
{
string s = new string('c', 500);
byte[] content = Encoding.Unicode.GetBytes(s);
var tasks = new Task[NumberOfThreads];
for (int t = 0; t < tasks.Length; t++)
{
tasks[t] = TaskEx.Run(async () =>
{
await TaskEx.Delay(new Random(t).Next(50));
for (int f = 0; f < NumberOfFilesPerThread; f++)
{
storage.Enqueue(() => new Transmission(new Uri("http://address"), content, string.Empty, string.Empty));
storage.Dequeue();
}
});
}
TaskEx.WhenAll(tasks).GetAwaiter().GetResult();
}
finally
{
while (storage.Dequeue() != null)
{
}
}
}
public void ReturnsFalseAndDoesNotSaveTransmissionWhenStorageCapacityIsAlreadyExceeded()
{
StubPlatformFile existingFile = CreateTransmissionFile(default(Uri), new byte[42]);
bool fileCreated = false;
StubPlatformFolder folder = CreateFolder(existingFile);
folder.OnCreateFile = name =>
{
fileCreated = true;
return(new StubPlatformFile());
};
var provider = new StubApplicationFolderProvider {
OnGetApplicationFolder = () => folder
};
var storage = new TransmissionStorage {
Capacity = 10
};
storage.Initialize(provider);
bool result = storage.Enqueue(() => new StubTransmission());
Thread.Sleep(20);
Assert.IsFalse(fileCreated, "file created");
Assert.IsFalse(result);
}
// Uncomment this integration test only during investigations.
// Create unit tests to test for specific error conditions it uncovers.
// [TestMethod]
public void IsThreadSafe()
{
const int NumberOfThreads = 16;
const int NumberOfFilesPerThread = 64;
var storage = new TransmissionStorage(new ApplicationFolderProvider());
try
{
string s = new string('c', 500);
byte[] content = Encoding.Unicode.GetBytes(s);
var tasks = new Task[NumberOfThreads];
for (int t = 0; t < tasks.Length; t++)
{
tasks[t] = TaskEx.Run(async() =>
{
await TaskEx.Delay(new Random(t).Next(50));
for (int f = 0; f < NumberOfFilesPerThread; f++)
{
storage.Enqueue(() => new Transmission(new Uri("http://address"), content, string.Empty, string.Empty));
storage.Dequeue();
}
});
}
TaskEx.WhenAll(tasks).GetAwaiter().GetResult();
}
finally
{
while (storage.Dequeue() != null)
{
}
}
}
public void ReturnsFalseDoesNotEnqueueIfProcessHasNoRightToListFilesInApplicationFolder()
{
var folder = new StubPlatformFolder {
OnGetFiles = () => { throw new UnauthorizedAccessException(); }
};
var provider = new StubApplicationFolderProvider {
OnGetApplicationFolder = () => folder
};
var storage = new TransmissionStorage(provider);
storage.Enqueue(() => new StubTransmission());
bool result = storage.Enqueue(() => new StubTransmission());
Assert.False(result);
}
public void ReturnsFalseWhenTransmissionGetterReturnedNullIndicatingNoMoreTransmissionsInBuffer()
{
var storage = new TransmissionStorage(new StubApplicationFolderProvider());
bool result = storage.Enqueue(() => null);
Assert.False(result);
}
public void ReturnsFalseWhenPreviousTransmissionExceedsCapacity()
{
StubPlatformFolder folder = CreateFolder();
var provider = new StubApplicationFolderProvider {
OnGetApplicationFolder = () => folder
};
var storage = new TransmissionStorage(provider)
{
Capacity = 10
};
bool firstTransmissionSaved = storage.Enqueue(() => new Transmission(new Uri("any://address"), new byte[42], string.Empty, string.Empty));
bool secondTransmissionSaved = storage.Enqueue(() => new Transmission(new Uri("any://address"), new byte[42], string.Empty, string.Empty));
Assert.True(firstTransmissionSaved);
Assert.False(secondTransmissionSaved);
}
public void ReturnsTrueWhenTransmissionIsSavedSuccessfully()
{
var storage = new TransmissionStorage(new StubApplicationFolderProvider());
bool result = storage.Enqueue(() => new StubTransmission());
Assert.True(result);
}
public void ReturnsFalseIfApplicationFolderIsNotAvailable()
{
var provider = new StubApplicationFolderProvider {
OnGetApplicationFolder = () => null
};
var storage = new TransmissionStorage(provider);
bool result = storage.Enqueue(() => new StubTransmission());
Assert.False(result);
}
public void CreatesFilesWithUniqueNamesToPreventConflictsWithOtherThreads()
{
var actualFileNames = new List <string>();
var folder = new StubPlatformFolder
{
OnCreateFile = fileName =>
{
actualFileNames.Add(fileName);
return(new StubPlatformFile());
}
};
var provider = new StubApplicationFolderProvider {
OnGetApplicationFolder = () => folder
};
var storage = new TransmissionStorage(provider);
storage.Enqueue(() => new StubTransmission());
storage.Enqueue(() => new StubTransmission());
Assert.NotEqual(actualFileNames[0], actualFileNames[1]);
}
public void DoesNotRemoveTransmissionFromBufferIfStorageCapacityIsExceededToAvoidDroppingData()
{
var storage = new TransmissionStorage(new StubApplicationFolderProvider())
{
Capacity = 0
};
bool transmissionRemovedFromBuffer = false;
storage.Enqueue(() =>
{
transmissionRemovedFromBuffer = true;
return(new StubTransmission());
});
Assert.False(transmissionRemovedFromBuffer);
}
public void DoesNotRemoveTransmissionFromBufferIfApplicationFolderIsNotAvailableToAvoidDroppingData()
{
var provider = new StubApplicationFolderProvider {
OnGetApplicationFolder = () => null
};
var storage = new TransmissionStorage(provider);
bool transmissionRemovedFromBuffer = false;
storage.Enqueue(() =>
{
transmissionRemovedFromBuffer = true;
return(new StubTransmission());
});
Assert.False(transmissionRemovedFromBuffer);
}
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 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 ChangesTemporaryExtensionToPermanentToMakeFileAvailableForDequeueAsync()
{
string permanentFileName = null;
StubPlatformFile file = CreateFile("TemporaryFile");
file.OnRename = desiredName => permanentFileName = desiredName;
var folder = new StubPlatformFolder {
OnCreateFile = fileName => file
};
var provider = new StubApplicationFolderProvider {
OnGetApplicationFolder = () => folder
};
var storage = new TransmissionStorage(provider);
storage.Enqueue(() => new StubTransmission());
Assert.True(permanentFileName.EndsWith(TransmissionStorage.TransmissionFileExtension, StringComparison.OrdinalIgnoreCase));
}
public void CreatesNewFileWithTemporaryExtensionToPreventConflictsWithDequeueAsync()
{
string temporaryFileName = null;
var folder = new StubPlatformFolder
{
OnCreateFile = fileName =>
{
temporaryFileName = fileName;
return(new StubPlatformFile());
}
};
var provider = new StubApplicationFolderProvider {
OnGetApplicationFolder = () => folder
};
var storage = new TransmissionStorage(provider);
storage.Enqueue(() => new StubTransmission());
Assert.True(temporaryFileName.EndsWith(TransmissionStorage.TemporaryFileExtension, StringComparison.OrdinalIgnoreCase));
}
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 DoesNotMakeMoreSpaceAvailableWhenTransmissionCouldNotBeDequeued()
{
var storage = new TransmissionStorage(new StubApplicationFolderProvider()) { Capacity = 0 };
storage.Enqueue(() => new StubTransmission());
storage.Dequeue();
Assert.False(storage.Enqueue(() => new StubTransmission()));
}
public void MakesSpaceAvailableForNextTransmission()
{
var storage = new TransmissionStorage(new StubApplicationFolderProvider()) { Capacity = 1 };
storage.Enqueue(() => new Transmission(new Uri("any://address"), new byte[1], "any/content", "any/encoding"));
storage.Dequeue();
Assert.True(storage.Enqueue(() => new StubTransmission()));
}
public void DoesNotRemoveTransmissionFromBufferIfStorageCapacityIsExceededToAvoidDroppingData()
{
var storage = new TransmissionStorage(new StubApplicationFolderProvider()) { Capacity = 0 };
bool transmissionRemovedFromBuffer = false;
storage.Enqueue(() =>
{
transmissionRemovedFromBuffer = true;
return new StubTransmission();
});
Assert.False(transmissionRemovedFromBuffer);
}
public void DoesNotRemoveTransmissionFromBufferIfApplicationFolderIsNotAvailableToAvoidDroppingData()
{
var provider = new StubApplicationFolderProvider { OnGetApplicationFolder = () => null };
var storage = new TransmissionStorage(provider);
bool transmissionRemovedFromBuffer = false;
storage.Enqueue(() =>
{
transmissionRemovedFromBuffer = true;
return new StubTransmission();
});
Assert.False(transmissionRemovedFromBuffer);
}
public void ReturnsFalseWhenTransmissionGetterReturnedNullIndicatingNoMoreTransmissionsInBuffer()
{
var storage = new TransmissionStorage(new StubApplicationFolderProvider());
bool result = storage.Enqueue(() => null);
Assert.False(result);
}
public void ChangesTemporaryExtensionToPermanentToMakeFileAvailableForDequeueAsync()
{
string permanentFileName = null;
StubPlatformFile file = CreateFile("TemporaryFile");
file.OnRename = desiredName => permanentFileName = desiredName;
var folder = new StubPlatformFolder { OnCreateFile = fileName => file };
var provider = new StubApplicationFolderProvider { OnGetApplicationFolder = () => folder };
var storage = new TransmissionStorage(provider);
storage.Enqueue(() => new StubTransmission());
Assert.True(permanentFileName.EndsWith(TransmissionStorage.TransmissionFileExtension, StringComparison.OrdinalIgnoreCase));
}
public void ReturnsFalseIfApplicationFolderIsNotAvailable()
{
var provider = new StubApplicationFolderProvider { OnGetApplicationFolder = () => null };
var storage = new TransmissionStorage(provider);
bool result = storage.Enqueue(() => new StubTransmission());
Assert.False(result);
}
public void SavesTransmissionFileAfterPreviousUnsuccessfullAttempt()
{
var storage = new TransmissionStorage(new StubApplicationFolderProvider()) { Capacity = 0 };
storage.Enqueue(() => new StubTransmission());
storage.Capacity = 1;
Assert.True(storage.Enqueue(() => new StubTransmission()));
}
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 ReturnsFalseWhenPreviousTransmissionExceedsCapacity()
{
StubPlatformFolder folder = CreateFolder();
var provider = new StubApplicationFolderProvider { OnGetApplicationFolder = () => folder };
var storage = new TransmissionStorage(provider) { Capacity = 10 };
bool firstTransmissionSaved = storage.Enqueue(() => new Transmission(new Uri("any://address"), new byte[42], string.Empty, string.Empty));
bool secondTransmissionSaved = storage.Enqueue(() => new Transmission(new Uri("any://address"), new byte[42], string.Empty, string.Empty));
Assert.True(firstTransmissionSaved);
Assert.False(secondTransmissionSaved);
}
public void ReturnsFalseAndDoesNotSaveTransmissionWhenStorageCapacityIsAlreadyExceeded()
{
StubPlatformFile existingFile = CreateTransmissionFile(default(Uri), new byte[42]);
bool fileCreated = false;
StubPlatformFolder folder = CreateFolder(existingFile);
folder.OnCreateFile = name =>
{
fileCreated = true;
return new StubPlatformFile();
};
var provider = new StubApplicationFolderProvider { OnGetApplicationFolder = () => folder };
var storage = new TransmissionStorage(provider) { Capacity = 10 };
bool result = storage.Enqueue(() => new StubTransmission());
Thread.Sleep(20);
Assert.False(fileCreated, "filecreated");
Assert.False(result);
}
public void ReturnsTrueWhenTransmissionIsSavedSuccessfully()
{
var storage = new TransmissionStorage(new StubApplicationFolderProvider());
bool result = storage.Enqueue(() => new StubTransmission());
Assert.True(result);
}
public void CreatesFilesWithUniqueNamesToPreventConflictsWithOtherThreads()
{
var actualFileNames = new List<string>();
var folder = new StubPlatformFolder
{
OnCreateFile = fileName =>
{
actualFileNames.Add(fileName);
return new StubPlatformFile();
}
};
var provider = new StubApplicationFolderProvider { OnGetApplicationFolder = () => folder };
var storage = new TransmissionStorage(provider);
storage.Enqueue(() => new StubTransmission());
storage.Enqueue(() => new StubTransmission());
Assert.NotEqual(actualFileNames[0], actualFileNames[1]);
}
public void ReturnsFalseDoesNotEnqueueIfProcessHasNoRightToListFilesInApplicationFolder()
{
var folder = new StubPlatformFolder { OnGetFiles = () => { throw new UnauthorizedAccessException(); } };
var provider = new StubApplicationFolderProvider { OnGetApplicationFolder = () => folder };
var storage = new TransmissionStorage(provider);
storage.Enqueue(() => new StubTransmission());
bool result = storage.Enqueue(() => new StubTransmission());
Assert.False(result);
}
public void CreatesNewFileWithTemporaryExtensionToPreventConflictsWithDequeueAsync()
{
string temporaryFileName = null;
var folder = new StubPlatformFolder
{
OnCreateFile = fileName =>
{
temporaryFileName = fileName;
return new StubPlatformFile();
}
};
var provider = new StubApplicationFolderProvider { OnGetApplicationFolder = () => folder };
var storage = new TransmissionStorage(provider);
storage.Enqueue(() => new StubTransmission());
Assert.True(temporaryFileName.EndsWith(TransmissionStorage.TemporaryFileExtension, StringComparison.OrdinalIgnoreCase));
}
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 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));
}