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Alternative (to BeaconChainHarness) BeaconChain testing API (#1380)

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The PR:

* Adds the ability to generate a crucial test scenario that isn't possible with `BeaconChainHarness` (i.e. two blocks occupying the same slot; previously forks necessitated skipping slots):

![image](https://user-images.githubusercontent.com/165678/88195404-4bce3580-cc40-11ea-8c08-b48d2e1d5959.png)

* New testing API: Instead of repeatedly calling add_block(), you generate a sorted `Vec<Slot>` and leave it up to the framework to generate blocks at those slots.
* Jumping backwards to an earlier epoch is a hard error, so that tests necessarily generate blocks in a epoch-by-epoch manner.
* Configures the test logger so that output is printed on the console in case a test fails.  The logger also plays well with `--nocapture`, contrary to the existing testing framework
* Rewrites existing fork pruning tests to use the new API
* Adds a tests that triggers finalization at a non epoch boundary slot
* Renamed `BeaconChainYoke` to `BeaconChainTestingRig` because the former has been too confusing
* Fixed multiple tests (e.g. `block_production_different_shuffling_long`, `delete_blocks_and_states`, `shuffling_compatible_simple_fork`) that relied on a weird (and accidental) feature of the old `BeaconChainHarness` that attestations aren't produced for epochs earlier than the current one, thus masking potential bugs in test cases.

Co-authored-by: Michael Sproul <michael@sigmaprime.io>
This commit is contained in:
Adam Szkoda
2020-08-26 09:24:55 +00:00
parent 30bb7aecfb
commit d9f4819fe0
17 changed files with 1220 additions and 824 deletions
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2
beacon_node/store/src/hot_cold_store.rs
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@@ -825,7 +825,7 @@ impl<E: EthSpec, Hot: ItemStore<E>, Cold: ItemStore<E>> HotColdDB<E, Hot, Cold>
}
/// Advance the split point of the store, moving new finalized states to the freezer.
pub fn process_finalization<E: EthSpec, Hot: ItemStore<E>, Cold: ItemStore<E>>(
pub fn migrate_database<E: EthSpec, Hot: ItemStore<E>, Cold: ItemStore<E>>(
store: Arc<HotColdDB<E, Hot, Cold>>,
frozen_head_root: Hash256,
frozen_head: &BeaconState<E>,

2
beacon_node/store/src/lib.rs
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@@ -27,7 +27,7 @@ pub mod iter;
use std::borrow::Cow;
pub use self::config::StoreConfig;
pub use self::hot_cold_store::{HotColdDB, HotStateSummary, Split};
pub use self::hot_cold_store::{BlockReplay, HotColdDB, HotStateSummary, Split};
pub use self::leveldb_store::LevelDB;
pub use self::memory_store::MemoryStore;
pub use self::partial_beacon_state::PartialBeaconState;