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Linux Is the Largest Software Development Project On the Planet: Greg K-H (cio.com)
sfcrazy writes: Greg Kroah-Hartmant, the Linux superstar, delivered a keynote at CoreOS Fest where he gave some impressive details on how massive is the Linux project. Kroah-Hartman said the latest release (4.5) made two months ago contains over 21 million lines of code. More impressive than the amount of code, and what truly makes Linux the world's largest software project is the fact that last year around 4,000 developers and at least 440 different companies that contributed to the kernel. Kroah-Hartman said, "It's the largest software development project ever, in the history of computing -- by the number of people using it, developing it, and now using it, and the number of companies involved. It's a huge number of people."
That is because unit tests are useless and so is most QA/QC.
In your first sentence you demonstrate your total and complete ignorance of the subject matter at hand.
Let me guess, you think Agile development improves quality too.
No, it improves the productivity of shitty prima donna developers who think they can spend 8 years writing 4 lines of code to get it just right. It allows middle managers to reel in asshole developers who think their shit doesn't stink while actually producing nothing of use to the business.
Its a really shitty development pattern for a good developer, but 99.99999% of developers are shitty and Agile is far better than free roam for them. Your average run of the mill developer in most software shops is actually less useful and efficient than most janitors.
For every Linus there are 7 billion people who aren't.
By the time you have defined all your "unit tests" we have already built the entire system and have it running in the real world.
Of course mine will work and do what its supposed to do, yours will be buggy, not meet the design requirements, not function as expected in random ways.
You are the definition of ignorant on this matter. You really should just keep your opinion to yourself because the only people who are going to agree with you are going to be the same people in the unemployment line with you.
Software development is an engineering practice when done right, which you clearly have no fucking clue how real engineers work. Fortunately people like you will never be allowed to do anything that actually matters like build bridges or buildings, and your ignorance and arrogance will prevent you from even understanding why you'll never be able to do it.
So congratulations there snarky ... you've shown us you're nothing more than a completely ignorant, smug asshole who has no fucking clue when to shut his stupid mouth :)
Persistent Volume manager for Kubernetes - https://github.com/dwimsey/openshift-pvmanager
This is not entirely true when the software in question is being directly converted into hardware. This happens for VHDL, Verilog, and SystemVerilog. People call these hardware design languages, but the reality is that they are pure software. Other tools (Synopsis Design Compiler for example) turn this high-level software into low level netlists which in turn are used to produce silicon. A mistake in the high level software can cost millions of dollars to fix and spin a new piece of silicon.
The definition of 'unit', however, is not necessarily always agreed upon. What is the 'smallest possible' unit that can be tested? I would argue that it is the smallest possible unit that makes sense to test. For example, a PCI-Express root-port has at least one very well defined interface (the actual PCIe bus), but often also has very well defined internal-interfaces for how the root-port 'unit' plugs into the rest of the chip. Since all interfaces are very well defined, I can write unit level tests to fully exercise and prove that the root-port works correctly, and there is very little need to write full-chip tests which would end up taking days to run vs the hour or two it takes to run against just the unit.
The full-system tests are much harder to develop as they require writing assembler to get the CPUs to send traffic down to PCIe. But instead I can directly send write/read commands which is much simpler test case to develop. IT also gives me finer grain control of my test and the timings, as I don't have nonsense like cache-hits, misses, etc getting in the way and perturbing my stimulus timings.
The logic portion of developing hardware is almost entirely a software problem these days, with the exception that this software has to meet some real world constraints of physical setup and hold timings. But software for real-time embedded systems have similar timing requirements that must be met, so it's not a completely foreign concept to software development.
Unit testing is critical to certain sectors of software development, and large corporations spend hundreds of millions of dollars a year doing unit testing because in the long run it saves a ton of money and time.