}

    @Override
    void expectDownloadMissing() {
        def path = relativeFilePath()
        server.stubFileNotFound(path)
    }

    void expectDownloadAuthenticationError() {
        server.stubGetFileAuthFailure(relativeFilePath())
    }

    @Override
    void expectMetadataRetrieve() {
        server.stubMetaData(file, relativeFilePath())
    }

    @Override
    void expectMetadataRetrieveMissing() {

    }

    @Override
    void expectDownloadMissing() {
        def path = relativeFilePath()
        server.stubFileNotFound(path)
    }

    void expectDownloadAuthenticationError() {
        server.stubGetFileAuthFailure(relativeFilePath())
    }

    @Override
    void expectMetadataRetrieve() {
        server.stubMetaData(file, relativeFilePath())
    }

    @Override
    void expectMetadataRetrieveMissing() {

                    }
                    """
                }
            }
        }
        expect(httpStub)
    }

    def stubGetFileAuthFailure(String url) {
        def urlParts = urlParts(url)
        def bucketName = urlParts.first
        def objectName = urlParts.rest

        HttpStub httpStub = HttpStub.stubInteraction {
            request {

                    'Content-Type': 'application/xml',
                ]

                body = { xml.toString() }
            }
        }
        expect(httpStub)
    }

    def stubGetFileAuthFailure(String url) {
        def xml = new StreamingMarkupBuilder().bind {
            Error() {
                Code("InvalidAccessKeyId")