# frozen_string_literal: true

# Released under the MIT License.
# Copyright, 2023-2025, by Samuel Williams.

require "protocol/http/body/head"
require "protocol/http/body/buffered"

describe Protocol::HTTP::Body::Head do
	with "zero length" do
		let(:body) {subject.new(0)}
		
		it "should be ready" do
			expect(body).to be(:ready?)
		end
		
		it "should be empty" do
			expect(body).to be(:empty?)
		end
		
		with "#join" do
			it "should be nil" do
				expect(body.join).to be_nil
			end
		end
	end
	
	with "non-zero length" do
		let(:body) {subject.new(1)}
		
		it "should be empty" do
			expect(body).to be(:empty?)
		end
		
		with "#read" do
			it "should be nil" do
				expect(body.join).to be_nil
			end
		end
		
		with "#join" do
			it "should be nil" do
				expect(body.join).to be_nil
			end
		end
	end
	
	with ".for" do
		with "body" do
			let(:source) {Protocol::HTTP::Body::Buffered.wrap("!")}
			let(:body) {subject.for(source)}
			
			it "captures length and closes existing body" do
				expect(source).to receive(:close)
				
				expect(body).to have_attributes(length: be == 1)
				body.close
			end
		end
		
		with "content length" do
			let(:body) {subject.for(nil, 42)}
			
			it "uses the content length if no body is provided" do
				expect(body).to have_attributes(length: be == 42)
				expect(body).to be(:empty?)
				expect(body).to be(:ready?)
			end
		end
	end
	
	with ".for with nil body" do
		it "returns nil when body is nil" do
			body = subject.for(nil)
			expect(body).to be_nil
		end
	end
end