From 4fc6e435d2a0c79c93fd1dc474404da6a3a67ce3 Mon Sep 17 00:00:00 2001
From: Paul Hauner <paul@paulhauner.com>
Date: Fri, 22 Mar 2019 11:38:57 +1100
Subject: [PATCH] Add type alias to test_harness

---
 .../beacon_chain/test_harness/src/beacon_chain_harness.rs     | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/beacon_node/beacon_chain/test_harness/src/beacon_chain_harness.rs b/beacon_node/beacon_chain/test_harness/src/beacon_chain_harness.rs
index 4b5d5558f..1207fcf28 100644
--- a/beacon_node/beacon_chain/test_harness/src/beacon_chain_harness.rs
+++ b/beacon_node/beacon_chain/test_harness/src/beacon_chain_harness.rs
@@ -15,6 +15,8 @@ use std::iter::FromIterator;
 use std::sync::Arc;
 use types::{test_utils::TestingBeaconStateBuilder, *};
 
+type TestingBeaconChain = BeaconChain<MemoryDB, TestingSlotClock, BitwiseLMDGhost<MemoryDB>>;
+
 /// The beacon chain harness simulates a single beacon node with `validator_count` validators connected
 /// to it. Each validator is provided a borrow to the beacon chain, where it may read
 /// information and submit blocks/attestations for processing.
@@ -23,7 +25,7 @@ use types::{test_utils::TestingBeaconStateBuilder, *};
 /// is not useful for testing that multiple beacon nodes can reach consensus.
 pub struct BeaconChainHarness {
     pub db: Arc<MemoryDB>,
-    pub beacon_chain: Arc<BeaconChain<MemoryDB, TestingSlotClock, BitwiseLMDGhost<MemoryDB>>>,
+    pub beacon_chain: Arc<TestingBeaconChain>,
     pub block_store: Arc<BeaconBlockStore<MemoryDB>>,
     pub state_store: Arc<BeaconStateStore<MemoryDB>>,
     pub validators: Vec<ValidatorHarness>,