Add Testkitchen test.

.kitchen.yml

@@ -98,6 +98,20 @@ suites:
               - dskDevice
               - ifName
 
+- name: datadog_consul
+  run_list:
+    - recipe[datadog::consul]
+  attributes:
+    datadog:
+      <<: *DATADOG
+      consul:
+        instances:
+          - url: http://localhost:8500
+            new_leader_checks: false
+            catalog_checks: false
+            service_whitelist: consul
+            tags: ['_default']
+
 - name: datadog_cassandra
   run_list:
     - recipe[datadog::cassandra]

test/integration/datadog_consul/serverspec/Gemfile

@@ -0,0 +1 @@
+../../helpers/serverspec/Gemfile

test/integration/datadog_consul/serverspec/consul_spec.rb

@@ -0,0 +1,36 @@
+# Encoding: utf-8
+require 'json_spec'
+require 'serverspec'
+require 'yaml'
+
+set :backend, :exec
+set :path, '/sbin:/usr/local/sbin:$PATH'
+
+AGENT_CONFIG = '/etc/dd-agent/conf.d/consul.yaml'
+
+describe service('datadog-agent') do
+  it { should be_running }
+end
+
+describe file(AGENT_CONFIG) do
+  it { should be_a_file }
+
+  it 'is valid yaml matching input values' do
+    generated = YAML.load_file(AGENT_CONFIG)
+
+    expected = {
+      'instances' => [
+        {
+          'url' => 'http://localhost:8500',
+          'new_leader_checks' => false,
+          'catalog_checks' => false,
+          'service_whitelist' => 'consul',
+          'tags' => ['_default']
+        }
+      ],
+      'init_config' => nil
+    }
+
+    expect(generated.to_json).to be_json_eql expected.to_json
+  end
+end