Return the buffer unless empty.

lib/protocol/http/body/stream.rb

@@ -263,7 +263,12 @@ def gets(separator = NEWLINE, limit = nil, chomp: false)
 								buffer = @buffer
 								@buffer = nil
 
-								return @buffer
+								# Return nil for empty buffers, otherwise return the content:
+								if buffer && !buffer.empty?
+									return buffer
+								else
+									return nil
+								end
 							end
 						end
 

test/protocol/http/body/stream.rb

@@ -240,6 +240,16 @@
 				expect(stream.gets).to be == nil
 			end
 		end
+
+		with "incomplete line at the end" do
+			let(:input) {Protocol::HTTP::Body::Buffered.new(["Hello\nWorld"])}
+
+			it "returns the remaining buffer when there is no more data to read" do
+				expect(stream.gets).to be == "Hello\n"
+				expect(stream.gets).to be == "World"
+				expect(stream.gets).to be == nil
+			end
+		end
 	end
 
 	with "#close_read" do