On Fri, Jul 30, 2021 at 12:13 AM Carl <carle...@gmail.com> wrote: > Hi, > > Is there a way to write a unit test that simulates a change in the wall > clock for a time.Time value? >
I use a combination of two approaches to simulate the passage of time (often both work together): - have functions a `now` argument so the caller supplies the timestamp (this avoids timestamp-skew for cases where the timestamps should be close together anyway) - Use a package like https://github.com/vimeo/go-clocks ( https://pkg.go.dev/github.com/vimeo/go-clocks) to use a real clock in production, but have a fake clock you can advance/set however you want without impinging on the main code Full disclosure: I wrote github.com/vimeo/go-clocks, so I might be a bit biased -- it is based on one of Google's internal packages for C++, though. One additional benefit of using a fake clock is that it allows for fine-grained synchronization between tests and code if you're sleeping in goroutines, as the fake clock in go-clocks has methods for awaiting a certain number of sleepers, etc. > > Cheers, > Carl > > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/golang-nuts/f306417d-46f9-4ccd-8e7c-69a1dbd14969n%40googlegroups.com > <https://groups.google.com/d/msgid/golang-nuts/f306417d-46f9-4ccd-8e7c-69a1dbd14969n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CANrC0Bj6KMLQ-erdAB0dfJC1XSNw%2BgWfx43pqSAZ8W4efpnZQQ%40mail.gmail.com.
