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"));
    }

    @Test

                    .build());
            options.addOption(Option.builder(THREADS)
                    .longOpt("threads")
                    .hasArg()
                    .desc("Thread count, for instance 4 (int) or 2C/2.5C (int/float) where C is core multiplied")
                    .build());
            options.addOption(Option.builder(BUILDER)
                    .longOpt("builder")
                    .hasArg()

                .build());
        options.addOption(Option.builder(THREADS)
                .longOpt("threads")
                .hasArg()
                .desc("Thread count, for instance 4 (int) or 2C/2.5C (int/float) where C is core multiplied")
                .build());
        options.addOption(Option.builder(BUILDER)
                .longOpt("builder")
                .hasArg()