Expose size and internal endpoints for composite endpoint.

lib/io/endpoint/composite_endpoint.rb

@@ -13,6 +13,13 @@ def initialize(endpoints, **options)
 			@endpoints = endpoints
 		end
 
+		attr :endpoints
+
+		# The number of endpoints in the composite endpoint.
+		def size
+			@endpoints.size
+		end
+
 		def each(&block)
 			@endpoints.each do |endpoint|
 				endpoint.each(&block)

test/io/endpoint/composite_endpoint.rb

@@ -45,4 +45,16 @@
 		servers&.each(&:close)
 		thread&.join
 	end
+
+	with '#size' do
+		it "returns the number of endpoints" do
+			expect(endpoint.size).to be == 1
+		end
+	end
+
+	with '#endpoints' do
+		it "returns the endpoints" do
+			expect(endpoint.endpoints).to be == [internal_endpoint]
+		end
+	end
 end