eth2.0-specs/specs/test_formats/epoch_processing/README.md

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# Epoch processing tests
The different epoch sub-transitions are tested individually with test handlers.
The format is similar to block-processing state-transition tests.
There is no "change" factor however, the transitions are pure functions with just the pre-state as input.
Hence, the format is shared between each test-handler. (See test condition documentation on how to run the tests.)
## Test case format
```yaml
description: string -- description of test case, purely for debugging purposes
bls_setting: int -- see general test-format spec.
pre: BeaconState -- state before running the sub-transition
post: BeaconState -- state after applying the epoch sub-transition.
```
## Condition
A handler of the `epoch_processing` test-runner should process these cases,
calling the corresponding processing implementation (same name, prefixed with `process_`).
This excludes the other parts of the epoch-transition.
The provided pre-state is already transitioned to just before the specific sub-transition of focus of the handler.
Sub-transitions:
- `justification_and_finalization`
- `crosslinks`
- *`justification_and_finalization` - planned testing extension*
- `registry_updates`
- `slashings`
- `final_updates`
The resulting state should match the expected `post` state.