require 'spec_helper'

describe Yell::Adapters::Io do

  it { should be_kind_of Yell::Adapters::Base }

  context "initialize" do
    it "should set default :format" do
      adapter = Yell::Adapters::Io.new

      expect(adapter.format).to be_kind_of(Yell::Formatter)
    end

    context ":level" do
      let(:level) { Yell::Level.new(:warn) }

      it "should set the level" do
        adapter = Yell::Adapters::Io.new(:level => level)

        expect(adapter.level).to eq(level)
      end

      it "should set the level when block was given" do
        adapter = Yell::Adapters::Io.new { |a| a.level = level }

        expect(adapter.level).to eq(level)
      end
    end

    context ":format" do
      let(:format) { Yell::Formatter.new }

      it "should set the level" do
        adapter = Yell::Adapters::Io.new(:format => format)

        expect(adapter.format).to eq(format)
      end

      it "should set the level when block was given" do
        adapter = Yell::Adapters::Io.new { |a| a.format = format }

        expect(adapter.format).to eq(format)
      end
    end
  end

  context "#write" do
    let(:logger) { Yell::Logger.new }
    let(:event) { Yell::Event.new(logger, 1, "Hello World") }
    let(:adapter) { Yell::Adapters::Io.new }
    let(:stream) { File.new('/dev/null', 'w') }

    before do
      stub(adapter).stream { stream }
    end

    it "should format the message" do
      mock.proxy(adapter.format).call( event )

      adapter.write(event)
    end

    it "should print formatted message to stream" do
      formatted = Yell::Formatter.new.call(event)
      mock(stream).syswrite(formatted)

      adapter.write(event)
    end
  end

end