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 <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Auto-Submit: Alan Donovan <[email protected]>
Reviewed-by: Alan Donovan <[email protected]>
Commit-Queue: Alan Donovan <[email protected]>
Reviewed-by: Damien Neil <[email protected]>

Author: qmuntal

src/net/net_test.go

@@ -98,12 +98,12 @@ func TestCloseWrite(t *testing.T) {
 				}
 
 				// Workaround for https://go.dev/issue/49352.
-				// On arm64 macOS (current as of macOS 12.4),
+				// On Windows and arm64 macOS (current as of macOS 12.4),
 				// reading from a socket at the same time as the client
 				// is closing it occasionally hangs for 60 seconds before
 				// returning ECONNRESET. Sleep for a bit to give the
 				// socket time to close before trying to read from it.
-				if runtime.GOOS == "darwin" && runtime.GOARCH == "arm64" {
+				if runtime.GOOS == "windows" || (runtime.GOOS == "darwin" && runtime.GOARCH == "arm64") {
 					time.Sleep(10 * time.Millisecond)
 				}