Sandbox API

In the chapter on Testing Strategies, we explain that ink! supports two means of End-to-End testing:

• #[ink_e2e::test]: The End-to-End tests spawn a local node process in the backend and submit transactions against it, returning the output to you.

• #[ink_e2e::test(backend(runtime_only))] With these settings, the End-to-End tests will be executed in a sandbox. The sandbox contains the pallet-revive, but anything that the node would do is mocked and can be influenced (block numbers, etc.).

You can utilize the DRink! library that is described on Testing Strategies to influence the state of the mocked sandbox. This is very useful for debugging, and we invite you to read the linked page.