From 768595dca21d71e240d9c706a0635eae7bb164ee Mon Sep 17 00:00:00 2001
From: Braydon Fuller <courier@braydon.com>
Date: Wed, 19 Oct 2016 22:05:45 -0400
Subject: [PATCH] test: include derivation test when private key has leading
 zeros

---
 test/hd-test.js | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/test/hd-test.js b/test/hd-test.js
index c6cb3865..8b3f6bcb 100644
--- a/test/hd-test.js
+++ b/test/hd-test.js
@@ -137,6 +137,14 @@ describe('HD', function() {
     assert.equal(child6.xpubkey, child6_pub);
   });
 
+  it('should derive correctly when private key has leading zeros', function() {
+    var key = 'xprv9s21ZrQH143K3ckY9DgU79uMTJkQRLdbCCVDh81SnxTgPzLLGax6uHeBULTtaEtcAvKjXfT7ZWtHzKjTpujMkUd9dDb8msDeAfnJxrgAYhr';
+    var hdkey = bcoin.hd.PrivateKey.fromBase58(key);
+    assert.equal(hdkey.privateKey.toString('hex'), '00000055378cf5fafb56c711c674143f9b0ee82ab0ba2924f19b64f5ae7cdbfd');
+    var child = hdkey.derivePath('m/44\'/0\'/0\'/0/0\'');
+    assert.equal(child.privateKey.toString('hex'), '3348069561d2a0fb925e74bf198762acc47dce7db27372257d2d959a9e6f8aeb');
+  });
+
   it('should deserialize master private key', function() {
     bcoin.hd.PrivateKey.fromBase58(master.xprivkey);
   });