public InputStream getErrorStream() {
            throw new AssertionError("HEAD request should not read error stream");
        }

        @Override
        public Map<String, List<String>> getHeaderFields() {
            return Collections.emptyMap();
        }
    }

    @Test
    public void test_HeadRequestWith200_ReturnsEmptyBody() throws Exception {
        // ## Arrange ##

            try {
                response.setEncoding(encoding);
                response.setHttpStatusCode(con.getResponseCode());
                response.setHeaders(con.getHeaderFields());
            } catch (final Exception e) {
                throw new CurlException("Failed to access the response.", e);
            }
            writeContent(() -> {
                try {