@Test
void testChecksum() throws URISyntaxException, IOException {

    final Path checksumTestFile = Path.of(Objects.requireNonNull(Thread.currentThread().getContextClassLoader()
            .getResource("checksum_test.txt")).toURI());
    final Mono<String> result = sha256ChecksumProvider.checksum(
            Files.newInputStream(checksumTestFile).readAllBytes());
    StepVerifier.create(result)
            .assertNext(resultValue -> assertThat(resultValue, is(
                    "5be0888bbe2087f962fee5748d9cf52e37e4c6a24af79675ff7e1ca0a1b12739")))
            .verifyComplete();
}