Invalid storage size print out missing bytes

Author: littleskunk

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);

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();
       });
     });