Blockchain technology is best known for Bitcoin and other cryptocurrencies. It is being investigated for use in many different areas, from payments to supply-chain logistics and energy generation. But testing decentralised applications, particularly on public blockchains, requires testers to think in a completely different way. How do you mitigate against the risk of bugs when you are deploying to an immutable data structure? How can you replicate a production environment that is spread across thousands of different nodes of varying performance and specification? How can you future-proof yourself against changes in the open-source software you are using? What does it…....