Integration testing with contracts

[vaibhavchellani]

We need to have integration testing with the contracts to be able to mock the contracts on the node and not needing to deploy the contracts for testing features on the node.

[vaibhavchellani]

There are currently 2 techniques to do this:

1. Common test input output maps: We can have a common input/output maps which dictate what the state root should be preProcessing and postProcessing, they also define what the testing data will be exactly. This is great because now we don't need to interact with contracts at all and can test individual components of the system from truffle tests and from go-node. The only con is that it requires a considerable effort to implement. Ideally it would be something like: https://github.com/ethereum/eth2.0-specs/tree/dev/tests

2. Having fixtures as truffle test, which preset the contracts to whatever state you want them to be by running tests. So a deposit fixture will deploy new contracts, update addresses on the go-node, and make a deposit on the contract, while the node can now do whatever it does when it receives a new deposit. The fixture can then query the DB to check if the state on the node matches the state on the contracts. This allows us to do proper integration testing with actual contracts with the cons being it would be a bit slow as we would be sending actual transactions.

[wanseob]

https://github.com/wanseob/zkopru/blob/master/containers/Contract.dockerfile

I hope this docker file can help you.

https://github.com/wanseob/zkopru/blob/master/packages/integration-test/tests/helper/context.ts

I am using the docker file to prepare the initial context. With the container, I can skip the migration steps or other settings.

[vaibhavchellani]

Thanks a lot @wanseob