Add spec files

spec/dummy_autoscaler_spec.rb

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+require 'spec_helper'
+
+describe 'Dummy Sensor and Actuator integration test' do
+  before(:context) do
+    @logger = Logger.new(STDOUT)
+  end
+
+  it 'should initialize correctly' do
+    sensor = SidekiqAutoscaler::Sensor::DummySensor.new
+    actuator = SidekiqAutoscaler::Actuator::DummyActuator.new
+    as = SidekiqAutoscaler::Autoscaler.new(sensor, actuator)
+    as.logger = @logger
+
+    as.start!(0)
+    sleep 5
+    as.stop!
+  end
+end

spec/heroku_worker_actuator_spec.rb

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+require 'spec_helper'
+require 'sidekiq_autoscaler/actuator/heroku_worker_actuator'
+
+describe 'HerokuWorkerActuator' do
+  before(:context) do
+  end
+
+
+  it 'should initialize with params' do
+    SidekiqAutoscaler::Actuator::HerokuWorkerActuator.new({
+      'SIDEKIQ_AUTOSCALER_APP_NAME' => 'not_empty',
+      'SIDEKIQ_AUTOSCALER_HEROKU_API_KEY' => 'not_empty'
+    })
+  end
+end
+
+describe 'HerokuWorkerActuator Exceptions' do
+  before(:context) do
+  end
+
+  it 'should fail on initialize without app_name' do
+    expect {
+      SidekiqAutoscaler::Actuator::HerokuWorkerActuator.new({
+       'SIDEKIQ_AUTOSCALER_HEROKU_API_KEY' => 'not_empty'
+      })
+    }.to raise_error(StandardError)
+  end
+
+  it 'should fail on initialize without heroku_api_key' do
+    expect {
+      SidekiqAutoscaler::Actuator::HerokuWorkerActuator.new({
+        'SIDEKIQ_AUTOSCALER_APP_NAME' => 'not_empty'
+      })
+    }.to raise_error(StandardError)
+  end
+
+end
+

spec/sidekiq_sensor_spec.rb

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+require 'spec_helper'
+require 'sidekiq_autoscaler/sensor/sidekiq_sensor'
+
+describe 'SidekiqSensor' do
+  before(:context) do
+  end
+
+
+  it 'should initialize with params' do
+    SidekiqAutoscaler::Sensor::SidekiqSensor.new({
+      'SIDEKIQ_AUTOSCALER_APP_NAME' => 'not_empty',
+      'SIDEKIQ_AUTOSCALER_HEROKU_API_KEY' => 'not_empty'
+    })
+  end
+end
+

spec/spec_helper.rb

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+#ref http://stackoverflow.com/questions/4398262/setup-rspec-to-test-a-gem-not-rails
+require 'bundler/setup'
+Bundler.setup
+
+require 'sidekiq_autoscaler'
+
+require 'logger'
+
+require 'rspec'
+require 'rspec/collection_matchers'
+
+RSpec.configure do |config|
+#  config.color_enabled = true
+  config.formatter     = 'documentation'
+  #RAILS 5:config.file_fixture_path = "spec/example"
+end