require 'ganymed/sampler/gauge'
require 'sampler/datasource_examples'

describe Ganymed::Sampler::Gauge do
  include_context 'DataSource'
  subject { Ganymed::Sampler::Gauge.new(ticks) }

  let(:values) { 10.times.collect { rand } }

  it_behaves_like Ganymed::Sampler::DataSource

  describe "#flush" do
    before(:each) do
      values.each do |value|
        subject.feed(ns, origin, nil, value)
      end
    end

    it "should call each" do
      subject.should_receive(:each).with(1).once
      subject.flush(1)
    end

    it "should yield all values" do
      expect { |b| subject.flush(1, &b) }.to yield_with_args(ns, origin, values)
    end
  end

  describe "#feed" do
    it "should add fed samples" do
      subject.should_receive(:add).with(ns, origin, value)
      subject.feed(ns, origin, nil, value)
    end
  end
end