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require "logstash/json"
require "spec_helper"

describe org.logstash.instrument.metrics.gauge.LazyDelegatingGauge do
  let(:key) { :mykey }
  let(:value) { "hello" }

  subject { described_class.new(key.to_s) }

  before :each do
    subject.set(value)
  end

  describe "#execute" do
    it "set the value of the gauge" do
      expect(subject.value).to eq(value)
    end
  end

  context "When serializing to JSON" do
    it "serializes the value" do
      expect(LogStash::Json.dump(subject)).to eq("\"#{value}\"")
    end
  end
end
