int cpus = Runtime.getRuntime().availableProcessors();
        assertEquals((int) (cpus * 2.2), cli.calculateDegreeOfConcurrency("2.2C"));
        assertEquals(1, cli.calculateDegreeOfConcurrency("0.0001C"));
        assertThrows(IllegalArgumentException.class, () -> cli.calculateDegreeOfConcurrency("-2.2C"));
        assertThrows(IllegalArgumentException.class, () -> cli.calculateDegreeOfConcurrency("0C"));
    }

        Hexdump.hexdump(ps, data, 0, 32);
        String output = baos.toString();

        assertNotNull(output);
        assertTrue(output.contains("00000:"));
        assertTrue(output.contains("00010:")); // Second line offset

        // Verify first line contains bytes 0-15
        assertTrue(output.contains(" 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F"));
        // Verify second line contains bytes 16-31

        assertEquals(5120, stats.getBytesTransferred(), "Should have transferred 5KB total");
        assertEquals(1, stats.getOperationErrors(), "Should have 1 error");
        assertEquals(0.25, stats.getErrorRate(), 0.001, "Error rate should be 25% (1 error out of 4 successful operations)");

        // Verify latency calculations
        assertTrue(stats.getAverageReadLatencyMicros() > 0, "Read latency should be positive");

    public void testCreateBulkLineWithNullId() {
        // Test that null ID causes exception
        SuggestItem item = new SuggestItem(new String[] { "text" }, new String[0][0], new String[0], 0, 0, 1.0f, new String[0],
                new String[0], new String[0], SuggestItem.Kind.DOCUMENT);
        // Explicitly set ID to null (constructor auto-generates ID)
        item.setId(null);

            // When - calculate percentage free
            double percentFree = (allocInfo.getFree() * 100.0) / allocInfo.getCapacity();

            // Then
            assertEquals(25.0, percentFree, 0.001);
        }

        @Test
        @DisplayName("Should support available space check pattern")
        void shouldSupportAvailableSpaceCheckPattern() {
            // Given

            double percentUsed = ((fileFsSizeInfo.getCapacity() - fileFsSizeInfo.getFree()) * 100.0) / fileFsSizeInfo.getCapacity();

            // Then
            assertEquals(25.0, percentFree, 0.001);
            assertEquals(75.0, percentUsed, 0.001);
        }
    }

        assertEquals("010203", StringUtil.toHex(new byte[] { 1, 2, 3 }));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testToHex2() throws Exception {
        assertEquals("0001", StringUtil.toHex(1));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testAppendHex() throws Exception {
        final StringBuilder buf = new StringBuilder();

                    ((fileFsFullSizeInfo.getCapacity() - fileFsFullSizeInfo.getFree()) * 100.0) / fileFsFullSizeInfo.getCapacity();

            // Then
            assertEquals(25.0, percentFree, 0.001);
            assertEquals(75.0, percentUsed, 0.001);
        }

        @Test
        @DisplayName("Should differentiate between caller available and actual free units")

          Doubles.asList(
              -Double.MIN_VALUE,
              -Double.MIN_NORMAL,
              -1,
              -20,
              Double.NaN,
              Double.NEGATIVE_INFINITY,
              -0.001));

  public void testFuzzyEqualsFinite() {
    for (double a : FINITE_DOUBLE_CANDIDATES) {
      for (double b : FINITE_DOUBLE_CANDIDATES) {
        for (double tolerance : FINITE_TOLERANCE_CANDIDATES) {

 *   <dt>An IPv6 "IPv4 compatible" (or "compat") address, {@code "::192.168.0.1"}.
 *   <dd>{@code 00 00 00 00 00 00 00 00 00 00 00 00 c0 a8 00 01}
 *   <dt>An IPv6 "IPv4 mapped" address, {@code "::ffff:192.168.0.1"}.
 *   <dd>{@code 00 00 00 00 00 00 00 00 00 00 ff ff c0 a8 00 01}
 * </dl>
 *
 * <p>A few notes about IPv6 "IPv4 mapped" addresses and their observed use in Java.
 *