Fix have_attributes on objects that define #send.

lib/sus/have.rb

@@ -42,7 +42,7 @@ def call(assertions, subject)
 				assertions.nested(self) do |assertions|
 					assertions.assert(subject.respond_to?(@name), "has attribute")
 					if @predicate
-						Expect.new(assertions, subject.send(@name)).to(@predicate)
+						Expect.new(assertions, subject.public_send(@name)).to(@predicate)
 					end
 				end
 			end

test/sus/have.rb

@@ -5,6 +5,8 @@
 
 User = Struct.new(:name, :age)
 
+require 'socket'
+
 describe Sus::Have do
 	describe User do
 		let(:user) {subject.new("Sus", 20)}
@@ -34,6 +36,26 @@
 		end
 	end
 
+	describe Socket do
+		def before
+			super
+
+			@socket = Socket.new(:INET, :STREAM)
+		end
+
+		def after
+			@socket.close
+
+			super
+		end
+
+		it 'can use have_attributes on object that defines #send' do
+			skip_unless_method_defined(:timeout, Socket)
+
+			expect(@socket).to have_attributes(timeout: be_nil)
+		end
+	end
+
 	describe Array do
 		let(:array) {[1, 2, 3]}