shell: add ec.decode command

weed/storage/super_block/replica_placement_test.go

@@ -0,0 +1,14 @@
+package super_block
+
+import (
+	"testing"
+)
+
+func TestReplicaPlacementSerialDeserial(t *testing.T) {
+	rp, _ := NewReplicaPlacementFromString("001")
+	newRp, _ := NewReplicaPlacementFromByte(rp.Byte())
+	if rp.String() != newRp.String() {
+		println("expected:", rp.String(), "actual:", newRp.String())
+		t.Fail()
+	}
+}