assertEquals(4, algNames.size());
    }

    @Test
    void emptySha1Calculator() {
        ChecksumAlgorithmService.ChecksumCalculator calculator =
                service.select("SHA-1").getCalculator();
        calculator.update(ByteBuffer.allocate(0));
        assertEquals("da39a3ee5e6b4b0d3255bfef95601890afd80709", calculator.checksum());
    }

    @Test
    void calculateByte() throws IOException {