Ensure saved files truncate existing file by default. (#33)

Author: ioquatix

lib/protocol/http/body/reader.rb

@@ -41,7 +41,7 @@ def finish
 				end
 
 				# Write the body of the response to the given file path.
-				def save(path, mode = ::File::WRONLY|::File::CREAT, **options)
+				def save(path, mode = ::File::WRONLY|::File::CREAT|::File::TRUNC, **options)
 					if @body
 						::File.open(path, mode, **options) do |file|
 							self.each do |chunk|

test/protocol/http/body/reader.rb

@@ -40,7 +40,13 @@ def initialize(body)
 			reader.save(path)
 			expect(File.read(path)).to be == 'thequickbrownfox'
 		end
-
+		
+		it 'saves by truncating an existing file if it exists' do
+			File.write(path, 'hello' * 100)
+			reader.save(path)
+			expect(File.read(path)).to be == 'thequickbrownfox'
+		end
+		
 		it 'mirrors the interface of File.open' do
 			reader.save(path, 'w')
 			expect(File.read(path)).to be == 'thequickbrownfox'