time: handle very large sleep durations
Fixes #4903.
R=golang-dev, daniel.morsing, dave, r
CC=golang-dev
https://golang.org/cl/7388056
diff --git a/src/pkg/time/sleep_test.go b/src/pkg/time/sleep_test.go
index bcdaffc..9908e22 100644
--- a/src/pkg/time/sleep_test.go
+++ b/src/pkg/time/sleep_test.go
@@ -293,3 +293,23 @@
}
t.Error(err)
}
+
+// Test that sleeping for an interval so large it overflows does not
+// result in a short sleep duration.
+func TestOverflowSleep(t *testing.T) {
+ const timeout = 25 * Millisecond
+ const big = Duration(int64(1<<63 - 1))
+ select {
+ case <-After(big):
+ t.Fatalf("big timeout fired")
+ case <-After(timeout):
+ // OK
+ }
+ const neg = Duration(-1 << 63)
+ select {
+ case <-After(neg):
+ // OK
+ case <-After(timeout):
+ t.Fatalf("negative timeout didn't fire")
+ }
+}
