adding tests for double64 type

spec/builders/message_builder.rb

@@ -16,6 +16,11 @@ def with_float( float )
     with_arg( "f", float )
     self
   end
+
+  def with_double( double )
+    with_arg( "d", double)
+    self
+  end
 
   def with_int( int )
     with_arg( "i", int )

spec/unit/osc_simple_packets_spec.rb

@@ -105,4 +105,14 @@
     args = msg.first.to_a
     args.first.must_equal( @first_blob )
   end
+
+  it "should decode messages with double64 types" do
+    pi = 3.14159
+
+    sent_msg = @builder.with_double( pi ).build
+    msg = OSC::OSCPacket.messages_from_network( sent_msg.encode )
+
+    args = msg.first.to_a
+    args.first.must_be_close_to( pi, 0.001 )
+  end
 end

spec/unit/osc_types_spec.rb

@@ -12,6 +12,12 @@
   end
 end
 
+describe OSC::OSCDouble64 do
+  it "should not blow up" do
+    OSC::OSCDouble64.new 1.0
+  end
+end
+
 describe OSC::OSCString do
   it "should not blow up" do
     OSC::OSCString.new "1"