Contents

require "spec_helper"

module Sidewatch

  describe Cloudwatch do

    let(:client){ spy("cloudwatch-client") }
    subject{ described_class.new(client: client) }

    describe "#send" do

      it "sends the metrics using the cloudwatch client" do
        metrics = []
        metrics << Metric.new(namespace: "Clocks", name: "Ticks", value: 1234, unit: "Count", dimensions: { "ClockName" => "cuckoo" }, timestamp: Time.at(1440494300))
        expected = {
          namespace: "Clocks",
          metric_data: [
            {
              metric_name: "Ticks",
              dimensions: [
                {
                  name: "ClockName",
                  value: "cuckoo"
                }
              ],
              timestamp: Time.at(1440494300),
              value: 1234,
              unit: "Count"
            }
          ]
        }

        subject.send(metrics)

        expect(client).to have_received(:put_metric_data).with(expected)
      end

      it "groups the metrics by namespace" do
        metrics = []
        metrics << Metric.new(namespace: "Clocks", name: "Ticks", value: 1234, unit: "Count")
        metrics << Metric.new(namespace: "Events", name: "Failed", value: 55, unit: "Count")
        received = []
        allow(client).to receive(:put_metric_data){ |data| received << data }

        subject.send(metrics)

        expect(received).to contain_exactly(hash_including(namespace: "Clocks"), hash_including(namespace: "Events"))
      end

      it "sends metrics in batches of max. 20 entries" do
        metrics = []
        25.times do |i|
          metrics << Metric.new(namespace: "Clocks", name: "Ticks", value: i, unit: "Count")
        end

        subject.send(metrics)

        expect(client).to have_received(:put_metric_data).exactly(2).times
      end

    end

  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
sidewatch-0.0.4	spec/cloudwatch_spec.rb