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# frozen_string_literal: true
# Released under the MIT License.
# Copyright, 2025, by Samuel Williams.
require "protocol/http/header/trailer"
describe Protocol::HTTP::Header::Trailer do
let(:header) {subject.parse(description)}
with "etag" do
it "contains etag header" do
expect(header).to be(:include?, "etag")
end
it "has one header" do
expect(header.length).to be == 1
end
end
with "etag, content-md5" do
it "contains multiple headers" do
expect(header).to be(:include?, "etag")
expect(header).to be(:include?, "content-md5")
end
it "has correct count" do
expect(header.length).to be == 2
end
end
with "etag, content-md5, expires" do
it "handles three headers" do
expect(header).to be(:include?, "etag")
expect(header).to be(:include?, "content-md5")
expect(header).to be(:include?, "expires")
end
it "serializes correctly" do
expect(header.to_s).to be == "etag,content-md5,expires"
end
end
with "etag , content-md5 , expires" do
it "strips whitespace" do
expect(header.length).to be == 3
expect(header).to be(:include?, "etag")
expect(header).to be(:include?, "content-md5")
end
end
with "empty header value" do
let(:header) {subject.new}
it "handles empty trailer" do
expect(header).to be(:empty?)
expect(header.to_s).to be == ""
end
end
with "#<<" do
let(:header) {subject.parse("etag")}
it "can add headers" do
header << "content-md5, expires"
expect(header.length).to be == 3
expect(header).to be(:include?, "expires")
end
end
with ".trailer?" do
it "should be forbidden in trailers" do
expect(subject).not.to be(:trailer?)
end
end
with ".new" do
it "preserves values when given array" do
header = subject.new(["etag", "content-md5"])
expect(header).to be(:include?, "etag")
expect(header).to be(:include?, "content-md5")
end
it "can initialize with string (backward compatibility)" do
header = subject.new("etag, content-md5")
expect(header).to be(:include?, "etag")
expect(header).to be(:include?, "content-md5")
end
it "raises ArgumentError for invalid value types" do
expect{subject.new(123)}.to raise_exception(ArgumentError)
end
end
end
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