Protocol::HTTP::Body::File should be rewindable?.

lib/protocol/http/body/file.rb

@@ -18,6 +18,7 @@ def self.open(path, *arguments, **options)
 
 				def initialize(file, range = nil, size: file.size, block_size: BLOCK_SIZE)
 					@file = file
+					@range = range
 
 					@block_size = block_size
 
@@ -26,6 +27,7 @@ def initialize(file, range = nil, size: file.size, block_size: BLOCK_SIZE)
 						@offset = range.min
 						@length = @remaining = range.size
 					else
+						@file.seek(0)
 						@offset = 0
 						@length = @remaining = size
 					end
@@ -51,11 +53,19 @@ def ready?
 					true
 				end
 
+				def buffered
+					self.class.new(@file.dup, @range, block_size: @block_size)
+				end
+
 				def rewind
 					@file.seek(@offset)
 					@remaining = @length
 				end
 
+				def rewindable?
+					true
+				end
+
 				def read
 					if @remaining > 0
 						amount = [@remaining, @block_size].min

test/protocol/http/body/file.rb

@@ -9,6 +9,10 @@
 	let(:path) {File.expand_path("file_spec.txt", __dir__)}
 	let(:body) {subject.open(path)}
 
+	after do
+		@body&.close
+	end
+
 	# with '#stream?' do
 	# 	it "should be streamable" do
 	# 		expect(body).to be(:stream?)
@@ -23,11 +27,16 @@
 
 	with "#close" do
 		it "should close file" do
-			expect(body.file).to receive(:close)
-
 			body.close
 
 			expect(body).to be(:empty?)
+			expect(body.file).to be(:closed?)
+		end
+	end
+
+	with "#rewindable?" do
+		it "should be rewindable" do
+			expect(body).to be(:rewindable?)
 		end
 	end
 
@@ -43,6 +52,17 @@
 		end
 	end
 
+	with "#buffered" do
+		it "should return a new instance" do
+			buffered = body.buffered
+
+			expect(buffered).to be_a(Protocol::HTTP::Body::File)
+			expect(buffered).not.to be_equal(body)
+		ensure
+			buffered&.close
+		end
+	end
+
 	with "#inspect" do
 		it "generates a string representation" do
 			expect(body.inspect).to be =~ /Protocol::HTTP::Body::File file=(.*?) offset=\d+ remaining=\d+/