From 078318094dde7ae64b2ad7e2a4860153e9cd30f0 Mon Sep 17 00:00:00 2001
From: Braydon Fuller <courier@braydon.com>
Date: Wed, 19 Oct 2016 23:06:39 -0400
Subject: [PATCH] test: include derivation test when private key has leading
 zeros

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

diff --git a/test/hdnode.js b/test/hdnode.js
index 2c4383e..a4fe0eb 100644
--- a/test/hdnode.js
+++ b/test/hdnode.js
@@ -387,5 +387,13 @@ describe('HDNode', function () {
         }, /Expected BIP32 derivation path/)
       })
     })
+
+    it('works when private key has leading zeros', function () {
+      var key = 'xprv9s21ZrQH143K3ckY9DgU79uMTJkQRLdbCCVDh81SnxTgPzLLGax6uHeBULTtaEtcAvKjXfT7ZWtHzKjTpujMkUd9dDb8msDeAfnJxrgAYhr'
+      var hdkey = HDNode.fromBase58(key)
+      assert.strictEqual(hdkey.keyPair.d.toBuffer(32).toString('hex'), '00000055378cf5fafb56c711c674143f9b0ee82ab0ba2924f19b64f5ae7cdbfd')
+      var child = hdkey.derivePath('m/44\'/0\'/0\'/0/0\'')
+      assert.strictEqual(child.keyPair.d.toBuffer().toString('hex'), '3348069561d2a0fb925e74bf198762acc47dce7db27372257d2d959a9e6f8aeb')
+    })
   })
 })