All you need to know about Blockchain Testing

What is Blockchain Technology?

  • Delay in process
  • Dependency on a single intermediary whose effectiveness in never 100%
  • In case of any gap in the transaction, no one takes the responsibility and people keep on blaming each other.

How Blockchain eliminates these problems?

Components of a Block in a Blockchain
Blocks connected back to back in a Blockchain

What is the need for testing in a Blockchain?

What all do you need to test in a Blockchain?

  1. Block Size: The maximum fixed limit of a block is 1 megabyte. After the introduction of bitcoin, the average size of a block for the first 18 months came out to be under 30 KB. But in December 2017, it hovered around 1 MB. What if the size of a block exceeds beyond 1 MB? Well, this is yet to be decided how the blocks above 1 MB pan out.
  2. Chain Size: There is no limit on the size of the chain. So it is fun to test it for its function and performance. For example, the bitcoin chain’s size keeps on increasing day by day.
  3. Load: With so many people on the blockchain, load becomes a major parameter to test in a blockchain. Let’s take an example of bitcoin. It currently has a maximum throughput of 3–4 transactions per second but what if the transaction/second increases as in case of Visa(2000), Paypal(193), etc. Hence load remains the major problem with blockchain as its performance drops when load increases.
  4. Security: Since there are many miners involved with a transaction, ensuring security is a little complex. Well, there is a multi-layered security system in a blockchain. If one of the layers have been hacked, the instantaneous transactions cannot be stopped. It is therefore to be tested that one security layer doesn’t affect the other.
  5. Transmission of data: Encrypted and decrypted data is transferred from computer to computer so it is necessary to test if the transmission process is working flawlessly. Is the data being sent received on the other end or there is a loss in between. So it becomes necessary to make sure that the data is not lost.
  6. Addition of block: Every new block is added to the chain once the transaction’s validity is authenticated. So it must be tested that there should not be any leak in the block addition system and the block must be added after authentication.
  7. Cryptographical data: Cryptography is the backbone of blockchain technology. So, it is necessary to make sure that the data is properly encrypted and decrypted.



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Deeksha Agarwal

Deeksha Agarwal

Deeksha Agarwal is in Product Growth at LambdaTest and is also a passionate tech blogger and product evangelist.