Testing Blockchain Implementations

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Testing Blockchain Implementations

This article provides insights into the concept of blockchain and how we at Q-Pros verify and validate implementations of such a cutting-edge architecture by applying specific types of functional and non-functional testing.

Digital space nowadays is handling more valuable assets than ever before given the huge number of amazing applications that we are using every day such as online banking, smart services, digital transactions, IoT and many more. Powerful technologies such as blockchain have been invented to help protect those valuable assets and allow us to work in smooth and secure manner.

What is Blockchain?

A blockchain is a growing list of records, called blocks that are linked using cryptography. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data. By design, once a record is added to the chain, you cannot edit or recall it in order to maintain security of the overall blockchain.

What we test?

Along with the regular functional testing scope, the following some of the main testing factors that we consider when we test any typical blockchain implementation:

  • Validate the block size.
  • Validate the chain size.
  • Test load since the load is a major parameter to the success of a blockchain.
  • Test adding blocks to ensure that there is no leak in the block addition system and the block is added after authentication.
  • Test to ensure that the data is properly encrypted and decrypted.
  • Test to ensure the integrity of data transmission. Integrity in terms of data being transferred from computer to computer without getting lost as well as the encryption and decryption process meanwhile.

How we test?

Obviously, various types of functional and non-functional requirements should be always taken into consideration throughout the different phases of testing any blockchain implementation. This is the sequence of testing we have been following at Quality Professionals and it has proven its efficiency:

  • Stage 1 – Functional Testing: test the main requirements of the implementation as a single block.
  • Stage 2 – Integration Testing: test to validate that API requests and responses are formatted and handled as they should be.
  • Stage 3 – Node Testing: testing independently all the nodes on the network to ensure smooth cooperation.
  • Stage 4 – Chain Testing: test to validate the blocks are being added properly and they cannot be changed.
  • Stage 5 – Performance Testing: It validates the expected and actual performance readings before deciding to launch.

Throughout our test, we leverage some of the market-leading tools for testing blockchain implementations such as Ethereum Tester, Embark, Truffle, TestRPC, Hyperledger Composer, Exonum Testkit, etc. Due to the decentralized nature of Blockchain; different types of tests can be performed at multiple stages in the software development lifecycle. The aim of testing is to ensure test coverage overall and fulfill the best quality for Blockchain applications. It is important to choose the right and suitable tools for Blockchain testing needs to achieve testing goals.