public void CreateReplacementFileInitiallyAbsent()
{
using (FileStream fs = FileUtilities.CreateReplacementFile(GetFullPath("Ghost"), FileShare.Read | FileShare.Delete))
{
XAssert.IsNotNull(fs);
XAssert.AreEqual(0, fs.Length);
fs.WriteByte(1);
}
}
public void CreateReplacementFileCanReplaceRunningExecutableLink()
{
string exeLink = GetFullPath("DummyWaiterLink");
XAssert.IsTrue(CreateHardLinkIfSupported(link: exeLink, linkTarget: DummyWaiter.GetDummyWaiterExeLocation()));
using (var waiter = DummyWaiter.RunAndWait())
{
using (FileStream fs = FileUtilities.CreateReplacementFile(exeLink, FileShare.Delete))
{
XAssert.AreEqual(0, fs.Length);
}
}
}
public void CreateReplacementFileReplacesFileEvenIfTruncationWasPossible()
{
const string Target = @"Target";
FileId originalId;
using (FileStream original = File.Create(GetFullPath(Target)))
{
originalId = FileUtilities.ReadFileUsnByHandle(original.SafeFileHandle).Value.FileId;
}
using (FileStream fs = FileUtilities.CreateReplacementFile(GetFullPath(Target), FileShare.Read | FileShare.Delete))
{
XAssert.IsNotNull(fs);
XAssert.AreNotEqual(originalId, FileUtilities.ReadFileUsnByHandle(fs.SafeFileHandle).Value.FileId, "File was truncated rather than replaced");
XAssert.AreEqual(0, fs.Length);
fs.WriteByte(1);
}
}
public void CreateReplacementFileCanReplaceMemoryMappedFile()
{
string file = GetFullPath("File");
string link = GetFullPath("link");
WithNewFileMemoryMapped(
file,
() =>
{
if (!CreateHardLinkIfSupported(link: link, linkTarget: file))
{
return;
}
using (FileStream fs = FileUtilities.CreateReplacementFile(link, FileShare.Delete))
{
XAssert.AreEqual(0, fs.Length);
}
});
}
public void CreateReplacementFileReplacesAfterRemovingReadonlyFlagIfDenyWriteACLPresent()
{
const string Target = @"Target";
FileId originalId;
using (FileStream original = File.Create(GetFullPath(Target)))
{
originalId = FileUtilities.ReadFileUsnByHandle(original.SafeFileHandle).Value.FileId;
}
SetReadonlyFlag(GetFullPath(Target));
AddDenyWriteACL(GetFullPath(Target));
using (FileStream fs = FileUtilities.CreateReplacementFile(GetFullPath(Target), FileShare.Read | FileShare.Delete))
{
XAssert.IsNotNull(fs);
XAssert.AreNotEqual(originalId, FileUtilities.ReadFileUsnByHandle(fs.SafeFileHandle).Value.FileId, "File was truncated rather than replaced");
XAssert.AreEqual(0, fs.Length);
fs.WriteByte(1);
}
}