Allow passing of arguments to wend methods

lib/wendy.rb

@@ -6,13 +6,14 @@ def wend(arg)
 
   class Wender
 
-    def initialize(initiator, arg)
+    def initialize(initiator, arg, *others)
       @initiator = initiator
       @arg = arg
+      @others = others
     end
 
-    def through(method)
-      Wender.new(initiator, initiator.send(method, arg))
+    def through(method, *others)
+      Wender.new(initiator, initiator.send(method, *([arg] + others)))
     end
 
     def result

spec/lib/wendy_spec.rb

@@ -11,16 +11,30 @@ def double(x)
     x + x
   end
 
+  def add(x, y)
+    x + y
+  end
+
   def wend_test
     wend(5).through(:square).and(:double).and_return
   end
 
+  def wend_test_with_arg
+    wend(5).through(:square).and(:double).and(:add, 15).and_return
+  end
+
 end
 
 describe Wendy do
 
+  let(:wender) { TestWender.new }
+
   it 'allows method chaining' do
-    TestWender.new.wend_test.should eq 50
+    wender.wend_test.should eq 50
+  end
+
+  it 'passes additional arguments to methods in the chain' do
+    wender.wend_test_with_arg.should eq 65
   end
 
 end