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# frozen_string_literal: true
# Released under the MIT License.
# Copyright, 2022-2025, by Samuel Williams.
require "protocol/http/body/stream"
require "protocol/http/body/buffered"
describe Protocol::HTTP::Body::Stream do
let(:input) {Protocol::HTTP::Body::Buffered.new(["Hello", "World"])}
let(:output) {Protocol::HTTP::Body::Buffered.new}
let(:stream) {subject.new(input, output)}
with "no input" do
let(:input) {nil}
it "should be empty" do
expect(stream).to be(:empty?)
end
it "should read nothing" do
expect(stream.read).to be == ""
end
end
with "#empty?" do
it "should be empty" do
expect(stream).to be(:empty?)
end
end
with "#read" do
it "should read from the input" do
expect(stream.read(5)).to be == "Hello"
end
it "can handle zero-length read" do
expect(stream.read(0)).to be == ""
end
it "can read the entire input" do
expect(stream.read).to be == "HelloWorld"
end
it "should read from the input into the given buffer" do
buffer = String.new
expect(stream.read(5, buffer)).to be == "Hello"
expect(buffer).to be == "Hello"
expect(stream.read(5, buffer)).to be == "World"
expect(buffer).to be == "World"
expect(stream.read(5, buffer)).to be == nil
expect(buffer).to be == ""
end
it "can read partial input" do
expect(stream.read(2)).to be == "He"
expect(stream.read(2)).to be == "ll"
expect(stream.read(2)).to be == "oW"
expect(stream.read(2)).to be == "or"
expect(stream.read(2)).to be == "ld"
expect(stream.read(2)).to be == nil
end
it "can read partial input into the given buffer" do
buffer = String.new
expect(stream.read(100, buffer)).to be == "HelloWorld"
expect(buffer).to be == "HelloWorld"
expect(stream.read(2, buffer)).to be == nil
expect(buffer).to be == ""
end
end
with "#read_nonblock" do
it "should read from the input" do
expect(stream.read_nonblock(5)).to be == "Hello"
expect(stream.read_nonblock(5)).to be == "World"
expect(stream.read_nonblock(5)).to be == nil
end
it "should read from the input into the given buffer" do
buffer = String.new
expect(stream.read_nonblock(5, buffer)).to be == "Hello"
expect(buffer).to be == "Hello"
expect(stream.read_nonblock(5, buffer)).to be == "World"
expect(buffer).to be == "World"
expect(stream.read_nonblock(5, buffer)).to be == nil
expect(buffer).to be == ""
end
it "can read input into the given buffer" do
buffer = String.new
expect(stream.read_nonblock(100, buffer)).to be == "Hello"
expect(buffer).to be == "Hello"
expect(stream.read_nonblock(100, buffer)).to be == "World"
expect(buffer).to be == "World"
expect(stream.read_nonblock(2, buffer)).to be == nil
expect(buffer).to be == ""
end
it "can read partial input" do
expect(stream.read_nonblock(2)).to be == "He"
expect(stream.read_nonblock(2)).to be == "ll"
expect(stream.read_nonblock(2)).to be == "o"
expect(stream.read_nonblock(2)).to be == "Wo"
expect(stream.read_nonblock(2)).to be == "rl"
expect(stream.read_nonblock(2)).to be == "d"
expect(stream.read_nonblock(2)).to be == nil
end
end
with "#read_partial" do
it "can read partial input" do
expect(stream.read_partial(2)).to be == "He"
expect(stream.read_partial(2)).to be == "ll"
expect(stream.read_partial(2)).to be == "o"
expect(stream.read_partial(2)).to be == "Wo"
expect(stream.read_partial(2)).to be == "rl"
expect(stream.read_partial(2)).to be == "d"
expect(stream.read_partial(2)).to be == nil
end
it "can read partial input with buffer" do
buffer = String.new
expect(stream.read_partial(2, buffer)).to be == "He"
expect(buffer).to be == "He"
expect(stream.read_partial(2, buffer)).to be == "ll"
expect(buffer).to be == "ll"
expect(stream.read_partial(2, buffer)).to be == "o"
expect(buffer).to be == "o"
expect(stream.read_partial(2, buffer)).to be == "Wo"
expect(buffer).to be == "Wo"
expect(stream.read_partial(2, buffer)).to be == "rl"
expect(buffer).to be == "rl"
expect(stream.read_partial(2, buffer)).to be == "d"
expect(buffer).to be == "d"
expect(stream.read_partial(2, buffer)).to be == nil
expect(buffer).to be == ""
end
end
with "#readpartial" do
it "can read partial input" do
expect(stream.readpartial(20)).to be == "Hello"
expect(stream.readpartial(20)).to be == "World"
expect{stream.readpartial(20)}.to raise_exception(EOFError)
end
it "can read partial input with buffer" do
buffer = String.new
expect(stream.readpartial(20, buffer)).to be == "Hello"
expect(buffer).to be == "Hello"
expect(stream.readpartial(20, buffer)).to be == "World"
expect(buffer).to be == "World"
expect{stream.readpartial(20, buffer)}.to raise_exception(EOFError)
expect(buffer).to be == ""
end
end
with "#each" do
it "can iterate over input" do
chunks = []
stream.each do |chunk|
chunks << chunk
end
expect(chunks).to be == ["Hello", "World"]
end
it "can iterate over input with buffer" do
expect(stream.read(2)).to be == "He"
chunks = []
stream.each do |chunk|
chunks << chunk
end
expect(chunks).to be == ["llo", "World"]
end
it "can return an enumerator" do
expect(stream.each.to_a).to be == ["Hello", "World"]
end
end
with "#read_until" do
it "can read until a pattern is encountered" do
expect(stream.read_until("o")).to be == "Hello"
expect(stream.read_until("d")).to be == "World"
end
it "can read until a pattern which isn't encountered" do
expect(stream.read_until("X")).to be_nil
end
end
with "#gets" do
let(:input) {Protocol::HTTP::Body::Buffered.new(["Hello\nWorld\n"])}
it "can read lines" do
expect(stream.gets).to be == "Hello\n"
expect(stream.gets).to be == "World\n"
expect(stream.gets).to be == nil
end
it "can read up until the limit" do
expect(stream.gets("X", 2)).to be == "He"
end
it "can read lines with limit" do
expect(stream.gets(2)).to be == "He"
expect(stream.gets(6)).to be == "llo\n"
expect(stream.gets(2)).to be == "Wo"
expect(stream.gets(6)).to be == "rld\n"
expect(stream.gets(2)).to be == nil
end
it "can read lines and chomp separators" do
expect(stream.gets(chomp: true)).to be == "Hello"
expect(stream.gets(chomp: true)).to be == "World"
expect(stream.gets(chomp: true)).to be == nil
end
it "can read without separator" do
expect(stream.gets(nil, 4)).to be == "Hell"
expect(stream.gets(nil, 4)).to be == "o\nWo"
expect(stream.gets(nil, 4)).to be == "rld\n"
expect(stream.gets(nil, 4)).to be == nil
end
with "several chunks" do
let(:input) {Protocol::HTTP::Body::Buffered.new(["Hello ", "World\n"])}
it "can read lines" do
expect(stream.gets).to be == "Hello World\n"
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
it "should close the input" do
stream.read(1)
stream.close_read
expect{stream.read(1)}.to raise_exception(IOError)
end
end
with "#write" do
it "should write to the output" do
expect(stream.write("Hello")).to be == 5
expect(stream.write("World")).to be == 5
expect(output.chunks).to be == ["Hello", "World"]
end
end
with "#<<" do
it "should write to the output" do
stream << "Hello"
stream << "World"
expect(output.chunks).to be == ["Hello", "World"]
end
end
with "#write_nonblock" do
it "should write to the output" do
stream.write_nonblock("Hello")
stream.write_nonblock("World")
expect(output.chunks).to be == ["Hello", "World"]
end
end
with "#puts" do
it "should write lines to the output" do
stream.puts("Hello", "World")
stream.puts("Goodbye")
expect(output.chunks).to be == ["Hello\nWorld\n", "Goodbye\n"]
end
end
with "#close_write" do
it "should close the input" do
stream.close_write
expect{stream.write("X")}.to raise_exception(IOError)
end
end
with "#flush" do
it "can be flushed" do
# For streams, this is a no-op since buffering is handled by the output body.
stream.flush
end
end
with "#close" do
it "can can be closed" do
stream.close
expect(stream).to be(:closed?)
end
it "can be closed multiple times" do
stream.close
stream.close
expect(stream).to be(:closed?)
end
end
with "IO.copy_stream" do
let(:output) {StringIO.new}
it "can copy input to output" do
::IO.copy_stream(stream, output)
expect(output.string).to be == "HelloWorld"
end
end
end
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