From be92bc5e4f57b1e69beb707e6992844b8d25b4c6 Mon Sep 17 00:00:00 2001
From: littleskunk <jens.heimbuerge@googlemail.com>
Date: Thu, 20 Jul 2017 00:22:30 +0200
Subject: [PATCH] Invalid storage size print out missing bytes

---
 lib/utils.js       | 3 ++-
 test/utils.unit.js | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/utils.js b/lib/utils.js
index 2c9cce2..522ea99 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -98,7 +98,8 @@ exports.validateAllocation = function(conf, callback) {
       }
 
       if (allocatedSpace > free + usedSpaceBytes) {
-        return callback(new Error('Invalid storage size'));
+        return callback(new Error('Invalid storage size: '+ 
+          -(free + usedSpaceBytes - allocatedSpace) +' bytes missing'));
       }
 
       return callback(null);
diff --git a/test/utils.unit.js b/test/utils.unit.js
index fc7dd82..d08710c 100644
--- a/test/utils.unit.js
+++ b/test/utils.unit.js
@@ -183,7 +183,8 @@ describe('module:utils', function() {
       }, function(err) {
         getFreeSpace.restore();
         getDirectorySize.restore();
-        expect(err.message).to.equal('Invalid storage size');
+        expect(err.message).to.equal(
+          'Invalid storage size: 1024 bytes missing');
         done();
       });
     });