4027: crunch-job logs its own version information.

[arvados.git] / services / keepstore / volume_unix_test.go

diff --git a/services/keepstore/volume_unix_test.go b/services/keepstore/volume_unix_test.go
index 278e656066a0adc2ec5d59bb1814c0f04776f00d..7a10fc5c60a3db5c22001f9264a77561016a6181 100644 (file)
--- a/services/keepstore/volume_unix_test.go
+++ b/services/keepstore/volume_unix_test.go
@@ -5,6 +5,7 @@ import (
        "fmt"
        "io/ioutil"
        "os"
+       "syscall"
        "testing"
        "time"
 )
@@ -100,6 +101,54 @@ func TestPutBadVolume(t *testing.T) {
        }
 }
 
+// TestPutTouch
+//     Test that when applying PUT to a block that already exists,
+//     the block's modification time is updated.
+func TestPutTouch(t *testing.T) {
+       v := TempUnixVolume(t, false)
+       defer _teardown(v)
+
+       if err := v.Put(TEST_HASH, TEST_BLOCK); err != nil {
+               t.Error(err)
+       }
+
+       // 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)
+               }
+       }
+
+       // Write the same block again.
+       if err := v.Put(TEST_HASH, TEST_BLOCK); err != nil {
+               t.Error(err)
+       }
+
+       // Verify threshold < t1
+       t1, err := v.Mtime(TEST_HASH)
+       if err != nil {
+               t.Error(err)
+       }
+       if t1.Before(threshold) {
+               t.Errorf("t1 %v must be >= threshold %v after v.Put ",
+                       t1, threshold)
+       }
+}
+
 // Serialization tests: launch a bunch of concurrent
 //
 // TODO(twp): show that the underlying Read/Write operations executed