Crate polkadot_node_subsystem_test_helpers

Utilities for testing subsystems.

Modules

mock

Generally useful mock data providers for unit tests.

Macros

arbitrary_order

Asserts that two patterns match, yet only one

Structs

ForwardSubsystem

A forward subsystem that implements Subsystem.

MessageCounter

Message counter over subsystems.

SingleItemSink

The sink half of a single-item sink that does not resolve until the item has been read.

SingleItemStream

The stream half of a single-item sink.

TestSubsystemContext

A test subsystem context.

TestSubsystemContextHandle

A handle for interacting with the subsystem context.

TestSubsystemSender

A test subsystem sender.

Yield

Future that yields the execution once and resolves immediately after.

Functions

derive_erasure_chunks_with_proofs_and_root

Helper for chunking available data.

make_buffered_subsystem_context

Make a test subsystem context with buffered overseer channel. Some tests (e.g. dispute-coordinator) create too many parallel operations and deadlock unless the channel is buffered. Usually buffer_size=1 is enough.

make_subsystem_context

Make a test subsystem context with buffer_size == 0. This is used by most of the tests.

sender_receiver

Construct a sender/receiver pair.

single_item_sink

Create a single-item Sink/Stream pair.

subsystem_test_harness

Test a subsystem, mocking the overseer