Fast forward time when writing Substrate Runtime Test

Question

I am writing an auction type application with Substrate runtime. In writing test case, how can I fast forward the blockchain time (what's retrieved from <timestamp::Module<T>>::get()) so I can reach the auction closing time and test the closing logic?

Thanks.

score 3 · Accepted Answer · answered Jul 19 '19 at 03:27

3

You can just use Timestamp::set_timestamp to change the timestamp to whatever value you want. e.g. Timestamp::set_timestamp(42);

You can check the tests for srml-timestamp for examples

https://github.com/paritytech/substrate/blob/fe7f6aff197cd68e102539a42df1134d600b4584/srml/timestamp/src/lib.rs#L368

answered Jul 19 '19 at 03:27

Bryan Chen

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Note that this does not trigger any other functions like `on_finalize` or `on_initialize`. You will have to do that manually. – Shawn Tabrizi Jul 19 '19 at 07:22
1

Tracking issue for fast forward blocks (instead of time): https://github.com/paritytech/substrate/issues/2818 – Bryan Chen Jul 19 '19 at 09:39
Additionally, you might need to call `session::rotate_session()` as well. – kianenigma Sep 12 '19 at 07:45

Fast forward time when writing Substrate Runtime Test

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