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# frozen_string_literal: true
# Released under the MIT License.
# Copyright, 2025, by Samuel Williams.
require "protocol/http/header/te"
describe Protocol::HTTP::Header::TE do
let(:header) {subject.parse(description)}
with "chunked" do
it "detects chunked encoding" do
expect(header).to be(:chunked?)
end
end
with "gzip" do
it "detects gzip encoding" do
expect(header).to be(:gzip?)
end
end
with "deflate" do
it "detects deflate encoding" do
expect(header).to be(:deflate?)
end
end
with "trailers" do
it "detects trailers acceptance" do
expect(header).to be(:trailers?)
end
end
with "compress" do
it "detects compress encoding" do
expect(header).to be(:compress?)
end
end
with "identity" do
it "detects identity encoding" do
expect(header).to be(:identity?)
end
end
with "gzip;q=0.8, chunked;q=1.0" do
it "parses quality factors" do
codings = header.transfer_codings
expect(codings.length).to be == 2
expect(codings[0].name).to be == "gzip"
expect(codings[0].quality_factor).to be == 0.8
expect(codings[1].name).to be == "chunked"
expect(codings[1].quality_factor).to be == 1.0
end
it "contains expected encodings" do
expect(header).to be(:gzip?)
expect(header).to be(:chunked?)
end
end
with "gzip;q=0.5, deflate;q=0.8" do
it "handles multiple quality factors" do
codings = header.transfer_codings.sort
expect(codings[0].name).to be == "deflate" # higher quality first
expect(codings[1].name).to be == "gzip"
end
end
with "empty header value" do
let(:header) {subject.new}
it "handles empty TE header" do
expect(header).to be(:empty?)
expect(header).not.to be(:chunked?)
end
end
with "#<<" do
let(:header) {subject.new}
it "can add encodings" do
header << "gzip"
expect(header).to be(:gzip?)
header << "chunked;q=0.9"
expect(header).to be(:chunked?)
end
end
with "error handling" do
it "raises ParseError for invalid transfer coding" do
header = subject.parse("invalid@encoding")
expect do
header.transfer_codings
end.to raise_exception(Protocol::HTTP::Header::TE::ParseError)
end
end
with ".trailer?" do
it "should be forbidden in trailers" do
expect(subject).not.to be(:trailer?)
end
end
with ".coerce" do
it "normalizes array values to lowercase" do
header = subject.coerce(["GZIP", "CHUNKED"])
expect(header).to be(:include?, "gzip")
expect(header).to be(:include?, "chunked")
expect(header).not.to be(:include?, "GZIP")
end
it "normalizes string values to lowercase" do
header = subject.coerce("GZIP, CHUNKED")
expect(header).to be(:include?, "gzip")
expect(header).to be(:include?, "chunked")
end
end
with ".new" do
it "preserves case when given array" do
header = subject.new(["GZIP", "CHUNKED"])
expect(header).to be(:include?, "GZIP")
expect(header).to be(:include?, "CHUNKED")
end
it "normalizes when given string (backward compatibility)" do
header = subject.new("GZIP, CHUNKED")
expect(header).to be(:include?, "gzip")
expect(header).to be(:include?, "chunked")
end
it "raises ArgumentError for invalid value types" do
expect{subject.new(123)}.to raise_exception(ArgumentError)
end
end
end
describe Protocol::HTTP::Header::TE::TransferCoding do
it "handles quality factor conversion" do
coding = subject.new("gzip", "0.8")
expect(coding.quality_factor).to be == 0.8
end
it "defaults quality factor to 1.0" do
coding = subject.new("gzip", nil)
expect(coding.quality_factor).to be == 1.0
end
it "serializes with quality factor" do
coding = subject.new("gzip", "0.8")
expect(coding.to_s).to be == "gzip;q=0.8"
end
it "serializes without quality factor when 1.0" do
coding = subject.new("gzip", nil)
expect(coding.to_s).to be == "gzip"
end
it "compares by quality factor" do
high = subject.new("gzip", "0.9")
low = subject.new("deflate", "0.5")
expect(high <=> low).to be == -1 # high quality first
end
end
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