parachains.rs

	#[async_std::test]
	async fn select_headers_to_prove_returns_err_if_required_para_block_is_missing_at_source() {
		assert!(matches!(
			select_headers_to_prove((20_u32, 10_u32, 200_u32, 100_u32), 300_u32,).await,
			Err(SubstrateError::MissingRequiredParachainHead(ParaId(0), 300_u64)),
		));
	}

	#[async_std::test]
	async fn select_headers_to_prove_fails_to_use_existing_ancient_relay_block() {
		assert_eq!(
			select_headers_to_prove((220_u32, 10_u32, 200_u32, 100_u32), 100_u32,)
				.await
				.map_err(drop),
			Ok((true, HeaderId(220, 220), HeaderId(200, 200))),
		);
	}

	#[async_std::test]
	async fn select_headers_to_prove_is_able_to_use_existing_recent_relay_block() {
		assert_eq!(
			select_headers_to_prove((40_u32, 10_u32, 200_u32, 100_u32), 100_u32,)
				.await
				.map_err(drop),
			Ok((false, HeaderId(10, 10), HeaderId(100, 100))),
		);
	}

	#[async_std::test]
	async fn select_headers_to_prove_uses_new_relay_block() {
		assert_eq!(
			select_headers_to_prove((20_u32, 10_u32, 200_u32, 100_u32), 200_u32,)
				.await
				.map_err(drop),
			Ok((true, HeaderId(20, 20), HeaderId(200, 200))),
		);
	}
}