client.rs

		assert_eq!(
			client.backend().blockchain().last_finalized().unwrap(),
			a3.hash(),
		);

		assert_eq!(
			client.backend().blockchain().justification(BlockId::Hash(a3.hash())).unwrap(),
			Some(justification),
		);

		assert_eq!(
			client.backend().blockchain().justification(BlockId::Hash(a1.hash())).unwrap(),
			None,
		);

		assert_eq!(
			client.backend().blockchain().justification(BlockId::Hash(a2.hash())).unwrap(),
			None,
		);
	}
}