moved zero pad

internal/common/strings_test.go

@@ -35,3 +35,18 @@ func TestUnify(t *testing.T) {
 		t.Errorf(`Double whitespaces need to be removed`)
 	}
 }
+
+func TestZeroPad(t *testing.T) {
+	cases := map[int]string{
+		0:    "000",
+		5:    "005",
+		1000: "1000",
+		50:   "050",
+	}
+
+	for key, val := range cases {
+		if res := ZeroPad(key, 3); res != val {
+			t.Errorf(`did not match`)
+		}
+	}
+}