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# frozen_string_literal: true
# Released under the MIT License.
# Copyright, 2025, by Samuel Williams.
require "protocol/http/header/accept_language"
describe Protocol::HTTP::Header::AcceptLanguage::Language do
it "should have default quality_factor of 1.0" do
language = subject.new("utf-8", nil)
expect(language.quality_factor).to be == 1.0
end
end
describe Protocol::HTTP::Header::AcceptLanguage do
let(:header) {subject.parse(description)}
let(:languages) {header.languages.sort}
with "da, en-gb;q=0.5, en;q=0.25" do
it "can parse languages" do
expect(header.length).to be == 3
expect(languages[0].name).to be == "da"
expect(languages[0].quality_factor).to be == 1.0
expect(languages[1].name).to be == "en-gb"
expect(languages[1].quality_factor).to be == 0.5
expect(languages[2].name).to be == "en"
expect(languages[2].quality_factor).to be == 0.25
end
end
with "en-gb;q=0.25, en;q=0.5, en-us" do
it "should order based on quality factor" do
expect(languages.collect(&:name)).to be == %w{en-us en en-gb}
end
end
with "en-us,en-gb;q=0.8,en;q=0.6,es-419" do
it "should order based on quality factor" do
expect(languages.collect(&:name)).to be == %w{en-us es-419 en-gb en}
end
end
with "*;q=0" do
it "should accept wildcard language" do
expect(languages[0].name).to be == "*"
expect(languages[0].quality_factor).to be == 0
end
end
with "en, de;q=0.5, jp;q=0.5" do
it "should preserve relative order" do
expect(languages[0].name).to be == "en"
expect(languages[1].name).to be == "de"
expect(languages[2].name).to be == "jp"
end
end
with "de, en-US; q=0.7, en ; q=0.3" do
it "should parse with optional whitespace" do
expect(languages[0].name).to be == "de"
expect(languages[1].name).to be == "en-US"
expect(languages[2].name).to be == "en"
end
end
with "en;q=0.123456" do
it "accepts quality factors with up to 6 decimal places" do
expect(languages[0].name).to be == "en"
expect(languages[0].quality_factor).to be == 0.123456
end
end
it "should not accept invalid input" do
bad_values = [
# Invalid quality factor:
"en;f=1",
# Invalid parameter:
"de;fr",
# Invalid use of separator:
";",
# Empty (we ignore this one):
# ","
]
bad_values.each do |value|
expect{subject.parse(value).languages}.to raise_exception(subject::ParseError)
end
end
end
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