"fmt"
"io/ioutil"
"os"
+ "syscall"
"testing"
"time"
)
if err := v.Put(TEST_HASH, TEST_BLOCK); err != nil {
t.Error(err)
}
- 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)
+ }
}
- // Sleep for 1s, then put the block again. The volume
- // should report a more recent mtime.
- //
- // TODO(twp): this would be better handled with a mock Time object.
- // Alternatively, set the mtime manually to some moment in the past
- // (maybe a v.SetMtime method?)
- //
- time.Sleep(time.Second)
+
+ // Write the same block again.
if err := v.Put(TEST_HASH, TEST_BLOCK); err != nil {
t.Error(err)
}
- new_mtime, err := v.Mtime(TEST_HASH)
+
+ // Verify threshold < t1
+ t1, err := v.Mtime(TEST_HASH)
if err != nil {
t.Error(err)
}
-
- if !new_mtime.After(old_mtime) {
- t.Errorf("v.Put did not update the block mtime:\nold_mtime = %v\nnew_mtime = %v\n",
- old_mtime, new_mtime)
+ if t1.Before(threshold) {
+ t.Errorf("t1 %v must be >= threshold %v after v.Put ",
+ t1, threshold)
}
}