public async Task CopyFileWithReplacement()
{
const string Src = "src";
const string Target = "target";
const string OriginalContents = "Your ad here.";
const string NewContents = "This is your ad.";
File.WriteAllText(GetFullPath(Src), OriginalContents);
await FileUtilities.CopyFileAsync(GetFullPath(Src), GetFullPath(Target));
XAssert.AreEqual(OriginalContents, File.ReadAllText(GetFullPath(Target)));
File.WriteAllText(GetFullPath(Src), NewContents);
await FileUtilities.CopyFileAsync(GetFullPath(Src), GetFullPath(Target));
XAssert.AreEqual(NewContents, File.ReadAllText(GetFullPath(Target)));
}
public async Task CopyPredicate()
{
const string Src = "src";
const string Target = "target";
File.WriteAllText(GetFullPath(Src), "Source");
XAssert.IsFalse(File.Exists(GetFullPath(Target)));
bool copied = await FileUtilities.CopyFileAsync(
GetFullPath(Src),
GetFullPath(Target),
(source, dest) =>
{
XAssert.IsNull(dest, "Destination handle should be null if the file does not exist");
return(true);
});
XAssert.IsTrue(File.Exists(GetFullPath(Target)));
XAssert.IsTrue(copied);
XAssert.AreEqual("Source", File.ReadAllText(GetFullPath(Target)));
File.WriteAllText(GetFullPath(Target), "Leave this here");
copied = await FileUtilities.CopyFileAsync(
GetFullPath(Src),
GetFullPath(Target),
(source, dest) => false);
XAssert.IsTrue(File.Exists(GetFullPath(Target)));
XAssert.IsFalse(copied);
XAssert.AreEqual("Leave this here", File.ReadAllText(GetFullPath(Target)));
copied = await FileUtilities.CopyFileAsync(
GetFullPath(Src),
GetFullPath(Target),
(source, dest) => true);
XAssert.IsTrue(File.Exists(GetFullPath(Target)));
XAssert.IsTrue(copied);
XAssert.AreEqual("Source", File.ReadAllText(GetFullPath(Target)));
}
public async Task CopyCompletionCallback()
{
const string Src = "src";
const string Target = "target";
File.WriteAllText(GetFullPath(Src), "Source");
Usn closeUsn = default(Usn);
var completionHandlerCalled = false;
await FileUtilities.CopyFileAsync(
GetFullPath(Src),
GetFullPath(Target),
onCompletion : (source, dest) =>
{
completionHandlerCalled = true;
if (!OperatingSystemHelper.IsUnixOS)
{
Usn?maybeCloseUsn = FileUtilities.TryWriteUsnCloseRecordByHandle(dest);
XAssert.IsNotNull(maybeCloseUsn);
closeUsn = maybeCloseUsn.Value;
}
});
XAssert.IsTrue(completionHandlerCalled);
XAssert.IsTrue(File.Exists(GetFullPath(Target)));
XAssert.AreEqual("Source", File.ReadAllText(GetFullPath(Target)));
if (!OperatingSystemHelper.IsUnixOS)
{
XAssert.AreNotEqual(0, closeUsn, "Completion callback skipped");
using (FileStream dest = File.OpenRead(GetFullPath(Target)))
{
Usn usn = FileUtilities.ReadFileUsnByHandle(dest.SafeFileHandle).Value.Usn;
XAssert.AreEqual(closeUsn, usn, "CLOSE usn should have been written during the callback.");
}
}
}
