public Task PutFileCreatesHardLink()
{
var context = new Context(Logger);
return(TestStore(context, Clock, async store =>
{
byte[] bytes = ThreadSafeRandom.GetBytes(ValueSize);
ContentHash contentHash = bytes.CalculateHash(ContentHashType);
// Verify content doesn't exist yet in store
Assert.False(await store.ContainsAsync(context, contentHash, null));
using (var tempDirectory = new DisposableDirectory(FileSystem))
{
AbsolutePath pathToContent = tempDirectory.Path / "tempContent.txt";
FileSystem.WriteAllBytes(pathToContent, bytes);
// Put the content into the store w/ hard link
var r = await store.PutFileAsync(context, pathToContent, FileRealizationMode.Any, ContentHashType, null);
Assert.False(r.ContentAlreadyExistsInCache);
ContentHash hashFromPut = r.ContentHash;
byte[] newBytes = ThreadSafeRandom.GetBytes(10);
Assert.False(newBytes.SequenceEqual(bytes));
// Update content
// This sneaky approach is only for testing, and is unexpected behavior
// in the system that could lead to cache inconsistencies.
FileSystem.AllowFileWrites(pathToContent);
FileSystem.AllowAttributeWrites(pathToContent);
FileSystem.SetFileAttributes(pathToContent, FileAttributes.Normal);
FileSystem.WriteAllBytes(pathToContent, newBytes);
// Verify new content is now reflected into the cache under the covers
var result = await store.OpenStreamAsync(context, hashFromPut, null);
byte[] bytesFromGet = await result.Stream.GetBytes();
Assert.True(bytesFromGet.SequenceEqual(newBytes));
}
}));
}