Testing

All Cairo code must be tested for the PR to be approved and merged. Tests must cover all of the functionality and edge cases.

Adding a new tests file

1. Create a new file, such as test_staking.cairo
2. Update tests/lib.cairo and add mod test_staking; Don't forget to sort the module names alphabetically.
3. Refer to the Starknet Foundry Book for reference on snforge which we use for tests.