Range option shouldn't fail on []

Fixes #107

CHANGELOG.md

@@ -9,6 +9,9 @@ Features
 Compatibility change:
 * Stripping leading and trailing whitespace of xlsx and csv values by default might change how your data gets parsed.
 
+Bugs fixes:
+* The `range` option everywhere doesn't fail on `[]` (#107)
+
 ## v0.7.0 / 2015-09-11
 
 Features

lib/squib/args/card_range.rb

@@ -23,7 +23,7 @@ module Squib
         input = 0..(deck_size - 1) if input == :all
         input = (input.to_i)..(input.to_i) if input.respond_to? :to_i
         raise ArgumentError.new("#{input} must be Enumerable (i.e. respond_to :each).") unless input.respond_to? :each
-        raise ArgumentError.new("#{input} is outside of deck range of 0..#{deck_size-1}") if input.max > (deck_size - 1)
+        raise ArgumentError.new("#{input} is outside of deck range of 0..#{deck_size-1}") if (!input.max.nil?) && (input.max > (deck_size - 1))
         input
       end
 

spec/args/range_spec.rb

@@ -33,4 +33,9 @@ describe Squib::Args::CardRange do
     expect(range.to_a).to eq([0])
   end
 
+  it 'allows [] as an empty range' do
+    range = Squib::Args::CardRange.new([], deck_size: 5)
+    expect(range.to_a).to eq([])
+  end
+
 end