Does not raise when default is a symbol and type is string

Author: rafaelfranca

lib/thor/parser/option.rb

@@ -119,6 +119,8 @@ def validate_default_type!
                        :boolean
                      when Numeric
                        :numeric
+                     when Symbol
+                       :string
                      when Hash, Array, String
                        @default.class.name.downcase.to_sym
                      end

spec/parser/option_spec.rb

@@ -141,6 +141,12 @@ def option(name, options = {})
     end.to raise_error(ArgumentError, "An option's default must match its type.")
   end
 
+  it "does not raises an error if default is an symbol and type string" do
+    expect do
+      option = option("foo", :type => :string, :default => :bar)
+    end.not_to raise_error
+  end
+
   it "boolean options cannot be required" do
     expect do
       option("foo", :required => true, :type => :boolean)