Allow setting block time for off-chain testing

[cmichi]

Escalated from this StackExchange question: https://substrate.stackexchange.com/questions/7034/is-it-possible-to-override-ink-envtest-default-block-time.

ToDo

• Add a method Engine::set_block_time(time: BlockTimestamp).

[CrommVardek]

I'm working on this, but before submitting my PR, shouldn't the env_access (using Env api) also implement a ink_env::set_block_time() function ?

Sorry if I'm missing something here, first time digging into ink! code base.

[cmichi]

@CrommVardek It's best if you look at the function advance_block in crates/engine/src/test_api.rs and implement set_block_time analog to it. So in your IDE you can look for usages of advance_block and add set_block_time to all these places as well.

IIRC it should just be crates/env/src/engine/off_chain/test_api.rs.

[CrommVardek]

PR #1721 opened

[cmichi]

Closed with #1721.