Merge pull request #243 from jylitalo/plus_prefix

Support '+' as prefix for integer

2 files changed, 6 insertions, 2 deletions

diff --git a/lib/slop/types.rb b/lib/slop/types.rb
index b7e41c8..4cd6136 100644
--- a/lib/slop/types.rb
+++ b/lib/slop/types.rb
@@ -44,7 +44,7 @@ module Slop
   # Cast the option argument to an Integer.
   class IntegerOption < Option
     def call(value)
-      value =~ /\A-?\d+\z/ && value.to_i
+      value =~ /\A[+-]?\d+\z/ && value.to_i
     end
   end
   IntOption = IntegerOption
diff --git a/test/types_test.rb b/test/types_test.rb
index c1aabaa..f6b928e 100644
--- a/test/types_test.rb
+++ b/test/types_test.rb
@@ -32,11 +32,15 @@ describe Slop::IntegerOption do
   before do
     @options = Slop::Options.new
     @age     = @options.integer "--age"
-    @result  = @options.parse %w(--age 20)
+    @minus   = @options.integer "--minus"
+    @plus    = @options.integer "--plus"
+    @result  = @options.parse %w(--age 20 --minus -10 --plus +30)
   end
 
   it "returns the value as an integer" do
     assert_equal 20, @result[:age]
+    assert_equal -10, @result[:minus]
+    assert_equal 30, @result[:plus]
   end
 
   it "returns nil for non-numbers by default" do