public void CreateVSSettingsFile(bool disallowPreviews)
{
VSSettingsFile = TestDirectory.GetFile("sdk.txt");
// Guard against tests writing too fast for the up-to-date check
// It happens more often on Unix due to https://github.com/dotnet/corefx/issues/12403
var lastWriteTimeUtc = VSSettingsFile.Exists ? VSSettingsFile.LastWriteTimeUtc : DateTime.MinValue;
for (int sleep = 10; sleep < 3000; sleep *= 2)
{
File.WriteAllText(VSSettingsFile.FullName, $"UsePreviews={!disallowPreviews}");
VSSettingsFile.Refresh();
if (VSSettingsFile.LastWriteTimeUtc > lastWriteTimeUtc)
{
return;
}
System.Threading.Thread.Sleep(sleep);
}
throw new InvalidOperationException("LastWriteTime is not changing.");
}
public void DeleteVSSettingsFile()
{
VSSettingsFile.Delete();
}
