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# frozen_string_literal: true
# Released under the MIT License.
# Copyright, 2023-2025, by Samuel Williams.
require "protocol/http/header/vary"
describe Protocol::HTTP::Header::Vary do
let(:header) {subject.parse(description)}
with "#<<" do
it "can append normalised header names" do
header << "Accept-Language"
expect(header).to be(:include?, "accept-language")
end
end
with "accept-language" do
it "should be case insensitive" do
expect(header).to be(:include?, "accept-language")
end
it "should not have unspecific keys" do
expect(header).not.to be(:include?, "user-agent")
end
end
with "Accept-Language" do
it "should be case insensitive" do
expect(header).to be(:include?, "accept-language")
end
it "uses normalised lower case keys" do
expect(header).not.to be(:include?, "Accept-Language")
end
end
with ".coerce" do
it "normalizes array values to lowercase" do
header = subject.coerce(["Accept-Language", "User-Agent"])
expect(header).to be(:include?, "accept-language")
expect(header).to be(:include?, "user-agent")
expect(header).not.to be(:include?, "Accept-Language")
end
it "normalizes string values to lowercase" do
header = subject.coerce("Accept-Language, User-Agent")
expect(header).to be(:include?, "accept-language")
expect(header).to be(:include?, "user-agent")
end
end
with ".new" do
it "preserves case when given array" do
header = subject.new(["Accept-Language", "User-Agent"])
expect(header).to be(:include?, "Accept-Language")
expect(header).to be(:include?, "User-Agent")
end
it "can initialize with string for backward compatibility" do
header = subject.new("Accept-Language, User-Agent")
expect(header).to be(:include?, "accept-language")
expect(header).to be(:include?, "user-agent")
end
it "raises ArgumentError for invalid value types" do
expect{subject.new(123)}.to raise_exception(ArgumentError)
end
end
end
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