child.fileMode == 1
        child.dirMode == 2
        child.filteringCharset == "ISO_8859_1"

        where:
        method << ['from', 'into']
    }

    def 'setting the filteringCharset to invalid value throws an exception'() {
        when:
        spec.filteringCharset = "THAT_SURE_IS_AN_INVALID_CHARSET"

        then:
        thrown(InvalidUserDataException)
    }

    public void setFilteringCharset(String charset) {
        Preconditions.checkNotNull(charset, "filteringCharset must not be null");
        if (!Charset.isSupported(charset)) {
            throw new InvalidUserDataException(String.format("filteringCharset %s is not supported by your JVM", charset));
        }
        this.filteringCharset = charset;
    }

    private static class MapBackedExpandAction implements Action<FileCopyDetails> {

            getInputs().property(specPropertyName + ".filePermissions", spec.getFilePermissions().map(FilePermissions::toUnixNumeric))
                .optional(true);
            getInputs().property(specPropertyName + ".filteringCharset", (Callable<String>) spec::getFilteringCharset);
        });
        this.getOutputs().doNotCacheIf(
            "Has custom actions",
            spec(task -> rootSpec.hasCustomActions())
        );