```ruby
require 'spec_helper'

describe NIO::Selector do
  it "monitors IO objects" do
    pipe, _ = IO.pipe

    monitor = subject.register(pipe, :r)
    monitor.should be_a NIO::Monitor
  end

  it "selects objects for readiness" do
    unready_pipe, _ = IO.pipe
    ready_pipe, ready_writer = IO.pipe

    # Give ready_pipe some data so it's ready
    ready_writer << "hi there"

    unready_monitor = subject.register(unready_pipe, :r)
    ready_monitor   = subject.register(ready_pipe, :r)

    ready_monitors = subject.select
    ready_monitors.should include ready_monitor
    ready_monitors.should_not include unready_monitor
  end
end
```

Break apart specs for different types of IO objects
user
```ruby
require 'spec_helper'

describe NIO::Selector do
  it "monitors IO objects" do
    pipe, _ = IO.pipe

    monitor = subject.register(pipe, :r)
    monitor.should be_a NIO::Monitor
  end

  context "IO object support" do
    context "pipes" do
      it "selects for read readiness" do
        unready_pipe, _ = IO.pipe
        ready_pipe, ready_writer = IO.pipe

        # Give ready_pipe some data so it's ready
        ready_writer << "hi there"

        unready_monitor = subject.register(unready_pipe, :r)
        ready_monitor   = subject.register(ready_pipe, :r)

        ready_monitors = subject.select
        ready_monitors.should include ready_monitor
        ready_monitors.should_not include unready_monitor
      end
    end

    context "TCPSockets" do
      it "selects for read readiness" do
        port = 12345
        server = TCPServer.new("localhost", port)

        ready_socket = TCPSocket.open("localhost", port)
        ready_writer = server.accept

        # Give ready_socket some data so it's ready
        ready_writer << "hi there"

        unready_socket = TCPSocket.open("localhost", port)

        unready_monitor = subject.register(unready_socket, :r)
        ready_monitor   = subject.register(ready_socket, :r)

        ready_monitors = subject.select
        ready_monitors.should include ready_monitor
        ready_monitors.should_not include unready_monitor
      end
    end
  end
end
```
assistant