Left pad Node#inspect hex digits with zeros.

lib/async/node.rb

@@ -218,7 +218,7 @@ def annotate(annotation)
 		end
 
 		def description
-			@object_name ||= "#{self.class}:0x#{object_id.to_s(16)}#{@transient ? ' transient' : nil}"
+			@object_name ||= "#{self.class}:#{format '%#018x', object_id}#{@transient ? ' transient' : nil}"
 
 			if @annotation
 				"#{@object_name} #{@annotation}"

spec/async/node_spec.rb

@@ -62,6 +62,30 @@
 			expect(lines[1]).to be =~ /\t#<Async::Node:0x\h+>\n/
 		end
 	end
+
+	describe '#inspect' do
+		let(:node) {Async::Node.new}
+
+		it 'should begin with the class name' do
+			expect(node.inspect).to start_with "#<#{node.class.name}"
+		end
+
+		it 'should end with hex digits' do
+			expect(node.inspect).to match(/\h>\z/)
+		end
+
+		it 'should have a standard number of hex digits' do
+			expect(node.inspect).to match(/:0x\h{16}>/)
+		end
+
+		it 'should have a colon in the middle' do
+			name, middle, hex = node.inspect.rpartition(':')
+
+			expect(name).to end_with node.class.name
+			expect(middle).to eq ':'
+			expect(hex).to match(/\A\h+/)
+		end
+	end
 
 	describe '#consume' do
 		it "can't consume middle node" do