require File.dirname(__FILE__) + "/../spec_helper"

RSpec.describe "ActiveRecord instantiation metrics", type: :request do
  let(:tags_middleware) do
    lambda do |tags|
      tags.merge(tags_middleware: :tags_middleware)
    end
  end
  let(:metric) { Metric.create!(name: "name") }
  before do
    allow_any_instance_of(InfluxDB::Rails::Configuration).to receive(:ignored_environments).and_return(%w[development])
    allow_any_instance_of(ActionDispatch::Request).to receive(:request_id).and_return(:request_id)
    allow_any_instance_of(InfluxDB::Rails::Configuration).to receive(:application_name).and_return(:app_name)
    allow_any_instance_of(InfluxDB::Rails::Configuration).to receive(:tags_middleware).and_return(tags_middleware)
  end

  it "writes metric" do
    get metric_path(metric)

    expect_metric(
      tags:   a_hash_including(
        location:        "MetricsController#show",
        hook:            "instantiation",
        class_name:      "Metric",
        additional_tag:  :value,
        server:          Socket.gethostname,
        app_name:        :app_name,
        tags_middleware: :tags_middleware
      ),
      values: a_hash_including(
        additional_value: :value,
        request_id:       :request_id,
        value:            be_between(1, 30),
        record_count:     1
      )
    )
  end

  it "includes correct timestamps" do
    travel_to Time.zone.local(2018, 1, 1, 9, 0, 0)

    get metric_path(metric)

    expect_metric(
      tags:      a_hash_including(
        location: "MetricsController#show",
        hook:     "instantiation"
      ),
      timestamp: 1_514_797_200
    )
  end

  it "does not write metric when hook is ignored" do
    allow_any_instance_of(InfluxDB::Rails::Configuration).to receive(:ignored_hooks).and_return(["instantiation.active_record"])

    get metric_path(metric)

    expect_no_metric(
      tags: a_hash_including(
        location: "MetricsController#show",
        hook:     "instantiation"
      )
    )
  end
end