# frozen_string_literal: true

RSpec.shared_context NIO::Selector do
  let(:selector) {@selector = NIO::Selector.new}

  after(:each) do
    if defined?(@selector)
      @selector.close
    end
  end
end

RSpec.shared_context "an NIO selectable" do
  include_context NIO::Selector

  it "selects readable objects" do
    monitor = selector.register(readable_subject, :r)
    ready = selector.select(1)
    expect(ready).to be_an Enumerable
    expect(ready).to include monitor
  end

  it "does not select unreadable objects" do
    selector.register(unreadable_subject, :r)
    expect(selector.select(0)).to be_nil
  end

  it "selects writable objects" do
    monitor = selector.register(writable_subject, :w)
    ready = selector.select(1)
    expect(ready).to be_an Enumerable
    expect(ready).to include monitor
  end

  it "does not select unwritable objects" do
    selector.register(unwritable_subject, :w)
    ready = selector.select(0)
    expect(ready).to be_nil
  end
end

RSpec.shared_context "an NIO selectable stream" do |is_tls13|
  include_context NIO::Selector

  let(:stream)   { pair.first }
  let(:peer)     { pair.last }

  it "selects readable when the other end closes" do
    monitor = selector.register(stream, :r)
    unless is_tls13
      expect(selector.select(1)).to be_nil
    end

    peer.close
    # Wait and give the TCP session time to close
    expect(selector.select(0.1)).to include monitor
  end
end

RSpec.shared_context "an NIO bidirectional stream" do
  include_context NIO::Selector

  let(:stream) {pair.first}
  let(:peer) {pair.last}

  it "selects readable and writable" do
    selector.register(readable_subject, :rw)

    selector.select(1) do |monitor|
      expect(monitor.readiness).to eq(:rw)
    end

    readable_subject.close
  end

  it "keeps readiness after the selectable has been closed" do
    selector.register(readable_subject, :rw)

    selector.select(1) do |monitor|
      expect(monitor.readiness).to eq(:rw)
      readable_subject.close
      expect(monitor.readiness).to eq(:rw)
    end
  end
end