${documentation}"""
        }
    }

    static class UnexpectedFormatVersion extends InCatalog<UnexpectedFormatVersion> {

        String unsupported
        String expected

        UnexpectedFormatVersion() {
            intro = """Invalid TOML catalog definition:
"""
        }

        UnexpectedFormatVersion unsupportedVersion(String v) {
            this.unsupported = v
            this

        when:
        parse 'unsupported-format'

        then:
        InvalidUserDataException ex = thrown()
        verify(ex.message, unexpectedFormatVersion {
            inCatalog('libs')
            unsupportedVersion('999.999')
            expectedVersion('1.1')
        })
    }