- old_mtime, err := v.Mtime(TEST_HASH)
- if err != nil {
- t.Error(err)
- }
- if old_mtime.IsZero() {
- t.Errorf("v.Mtime(%s) returned a zero mtime\n", TEST_HASH)
+
+ // We'll verify { t0 < threshold < t1 }, where t0 is the
+ // existing block's timestamp on disk before Put() and t1 is
+ // its timestamp after Put().
+ threshold := time.Now().Add(-time.Second)
+
+ // Set the stored block's mtime far enough in the past that we
+ // can see the difference between "timestamp didn't change"
+ // and "timestamp granularity is too low".
+ {
+ oldtime := time.Now().Add(-20 * time.Second).Unix()
+ if err := syscall.Utime(v.blockPath(TEST_HASH),
+ &syscall.Utimbuf{oldtime, oldtime}); err != nil {
+ t.Error(err)
+ }
+
+ // Make sure v.Mtime() agrees the above Utime really worked.
+ if t0, err := v.Mtime(TEST_HASH); err != nil || t0.IsZero() || !t0.Before(threshold) {
+ t.Errorf("Setting mtime failed: %v, %v", t0, err)
+ }