A smart contract that passes every functional test case can still fail in production in ways a typical web or mobile application never would. The reason is structural: blockchain transactions are irreversible, cost money to execute, and run on a network you don't control.
In most software, a bad transaction can be rolled back or patched. On a blockchain, once a transaction is confirmed, it's permanent. That means test plans need to weight correctness checks much more heavily than they would for software where mistakes are fixable after the fact.
Because each transaction incurs a fee, test plans should specifically verify that contract logic doesn't waste gas unnecessarily, and that fee-related edge cases (a transaction that runs out of gas mid-execution, for instance) are handled predictably rather than left to fail silently.
Running extensive tests against a live network is costly. A thorough testnet strategy, covering the same scenarios that would run in production, is what makes rigorous testing affordable before anything touches mainnet.
Blockchain applications often involve participants across different regions, devices, and network conditions interacting with the same contract. Testing needs scenarios that reflect that diversity, not just a single "happy path" user.
Smart contracts are a common target for exploits precisely because they're immutable and often hold value directly. Security testing (reentrancy, overflow conditions, access control on contract functions) belongs in the test plan from the start, not as an afterthought before launch.
Talk to our QA team about blockchain and smart contract testing.