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casper-fixtures

Fixture builder for casper execution engine tests based on: https://github.com/casper-network/casper-node/blob/release-1.5.6/execution_engine_testing/tests/src/lmdb_fixture.rs integrating https://github.com/Fraser999/lmdb-shrinker.

Creates and shrinks lmdb database so that the state can be loaded back into the execution-test-engine. Test builder in use is generally InMemoryWasmTestBuilder but after fixture creation and loading it will load as LmdbWasmTestBuilder.

Developer might need to change self authored utility functions from

fn function_name<T: CLTyped + FromBytes>(
    builder: &WasmTestBuilder<InMemoryWasmTestBuilder>,
) -> T

to accomodate the two different WasmTestBuilders to

fn function_name<T: CLTyped + FromBytes, S>(
    builder: &WasmTestBuilder<S>,
) -> T where
S: StateProvider + CommitProvider,
engine_state::Error: From<S::Error>,
S::Error: Into<execution::Error>

Create fixtures using the generate_fixture function that will create fixtures at ./fixtures/${generate_fixture_name_argument}/.

builder_from_global_state_fixture will try to load state from the place generate_fixture created it at.

Casper Versions

casper-engine-test-support = "7.0.1" casper-execution-engine = { version = "7.0.1", features = ["test-support"] } casper-types = { version = "4.0.0", default_features = false, features = ["datasize", "json-schema"] } casper-hashing = "3.0.0"

These correspond to release 1.5.6 of the Casper-Node. Use to create pre-2.0.0 state fixtures, for migration tests from 1.x to 2.x versions.

Reasons for this merged repo

  • automate lmdb shrinking
  • original work creates the fixtures in the "CARGO_MANIFEST_DIR", which causes third-party (out-of casper-node project) builds to be more easily lost/harder to find/harder to maintain.
  • unifying makes the pipeline quicker and easier to manage.