Do not export purge option

kv.go

@@ -202,8 +202,8 @@ func LastRevision(revision uint64) DeleteOpt {
 	})
 }
 
-// Purge removes all previous revisions.
-func Purge() DeleteOpt {
+// purge removes all previous revisions.
+func purge() DeleteOpt {
 	return deleteOptFn(func(opts *deleteOpts) error {
 		opts.purge = true
 		return nil
@@ -662,7 +662,7 @@ func (kv *kvs) Delete(key string, opts ...DeleteOpt) error {
 
 // Purge will remove the key and all revisions.
 func (kv *kvs) Purge(key string, opts ...DeleteOpt) error {
-	return kv.Delete(key, append(opts, Purge())...)
+	return kv.Delete(key, append(opts, purge())...)
 }
 
 const kvDefaultPurgeDeletesMarkerThreshold = 30 * time.Minute

test/kv_test.go

@@ -378,7 +378,9 @@ func TestKeyValueDeleteVsPurge(t *testing.T) {
 	if len(entries) != 4 {
 		t.Fatalf("Expected 4 entries for age after delete, got %d", len(entries))
 	}
-	err = kv.Purge("name")
+	err = kv.Purge("name", nats.LastRevision(4))
+	expectErr(t, err)
+	err = kv.Purge("name", nats.LastRevision(5))
 	expectOk(t, err)
 	// Check marker
 	e, err := kv.Get("name")