int mode = u * 64 + g * 8 + o;
                    assertEquals(mode, newUnixPermission(numericNotation).toUnixNumeric());
                }
            }
        }
    }

    @Test
    public void unixPermissionInNumericNotation_whitespaceIsTrimmed() {
        assertEquals(0754, newUnixPermission("  754   ").toUnixNumeric());
    }

    @Test