net: avoid windows hang in TestCloseWrite
On Windows, reading from a socket at the same time as the other
end is closing it will occasionally hang. This is a Windows issue, not
a Go issue, similar to what happens in macOS (see #49352).
Work around this condition by adding a brief sleep before the read.
Fixes #73140.
Change-Id: I24e457a577e507d0d69924af6ffa1aa24c4aaaa6
Reviewed-on: https://go-review.googlesource.com/c/go/+/671457
Reviewed-by: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Alan Donovan <adonovan@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
Commit-Queue: Alan Donovan <adonovan@google.com>
Reviewed-by: Damien Neil <dneil@google.com>