public async Task WillThrowIfFileExistsAndOverwriteFalseAndRealFileSystemIsUsed()
{
// Arrange
using (var testDirectory = TestDirectory.Create())
{
var fileSystemService = new FileSystemService();
var configuration = new Mock <IAppConfiguration>();
configuration
.Setup(x => x.FileStorageDirectory)
.Returns(testDirectory);
var service = new FileSystemFileStorageService(
configuration.Object,
fileSystemService);
var directory = Path.Combine(testDirectory, FolderName);
var filePath = Path.Combine(directory, FileName);
Directory.CreateDirectory(directory);
File.WriteAllText(filePath, FileContent);
// Act
var exception = await Assert.ThrowsAsync <InvalidOperationException>(() => service.SaveFileAsync(
FolderName,
FileName,
new MemoryStream(),
overwrite: false));
Assert.True(File.Exists(filePath), $"The file at path {filePath} should exist, but does not.");
Assert.Equal(FileContent, File.ReadAllText(filePath));
}
}
public async Task WillOverwriteFileIfOverwriteTrueAndRealFileSystemIsUsed()
{
// Arrange
using (var testDirectory = TestDirectory.Create())
{
var fileSystemService = new FileSystemService();
var configuration = new Mock <IAppConfiguration>();
configuration
.Setup(x => x.FileStorageDirectory)
.Returns(testDirectory);
var service = new FileSystemFileStorageService(
configuration.Object,
fileSystemService);
var directory = Path.Combine(testDirectory, FolderName);
var filePath = Path.Combine(directory, FileName);
Directory.CreateDirectory(directory);
File.WriteAllText(filePath, string.Empty);
// Act
await service.SaveFileAsync(
FolderName,
FileName,
new MemoryStream(Encoding.ASCII.GetBytes(FileContent)),
overwrite : true);
Assert.True(File.Exists(filePath), $"The file at path {filePath} should exist, but does not.");
Assert.Equal(FileContent, File.ReadAllText(filePath));
}
}
public async Task WillThrowIfFileExistsWhenManyThreadsAreTryingToSaveWithoutOverwriting()
{
// Arrange
using (var testDirectory = TestDirectory.Create())
{
var fileSystemService = new FileSystemService();
var configuration = new Mock <IAppConfiguration>();
configuration
.Setup(x => x.FileStorageDirectory)
.Returns(testDirectory);
var service = new FileSystemFileStorageService(
configuration.Object,
fileSystemService);
for (var i = 0; i < 10; i++)
{
var fileName = FileName + i;
var barrier = new Barrier(TaskCount);
var tasks = new List <Task <bool> >();
// Act
for (var taskIndex = 0; taskIndex < TaskCount; taskIndex++)
{
var task = SaveFileAsync(service, fileName, barrier);
tasks.Add(task);
}
var results = await Task.WhenAll(tasks);
// Assert
// One task should succeed. One should fail.
Assert.Equal(1, results.Count(success => success));
Assert.Equal(TaskCount - 1, results.Count(success => !success));
}
}
}