[tests] add dd-handler spec test

Or at least a beginning of tests, with multiple endpoints

.travis.yml

@@ -15,6 +15,7 @@ before_script:
   - eval "$(/opt/chefdk/bin/chef shell-init bash)"
   - chef gem install coveralls -v '~> 0.8.13'
   - chef gem install json_spec -v '~> 1.1.4'
+  - chef gem install chef-handler-datadog
 
 script:
   - chef --version

spec/dd-handler_spec.rb

@@ -0,0 +1,95 @@
+require 'spec_helper'
+
+shared_examples 'a chef-handler-datadog installer' do |version|
+  it 'includes chef_handler recipe' do
+    expect(chef_run).to include_recipe('chef_handler')
+  end
+
+  it 'installs the right version of chef-handler-datadog' do
+    expect(chef_run).to install_chef_gem('chef-handler-datadog').with(version: version)
+  end
+end
+
+shared_examples 'a chef-handler-datadog runner' do |extra_endpoints|
+  it 'runs the handler' do
+    handler_config = {
+      api_key: 'somethingnotnil',
+      application_key: 'somethingnotnil2',
+      use_ec2_instance_id: true,
+      tag_prefix: 'tag:',
+      url: 'https://app.datadoghq.com',
+      extra_endpoints: extra_endpoints || []
+    }
+
+    expect(chef_run).to enable_chef_handler('Chef::Handler::Datadog').with(
+      source: 'chef/handler/datadog',
+      arguments: [handler_config]
+    )
+  end
+end
+
+describe 'datadog::dd-handler' do
+  context 'standard usage' do
+    cached(:chef_run) do
+      ChefSpec::SoloRunner.new(
+        platform: 'ubuntu',
+        version: '14.04'
+      ) do |node|
+        node.set['datadog']['api_key'] = 'somethingnotnil'
+        node.set['datadog']['application_key'] = 'somethingnotnil2'
+        node.set['datadog']['chef_handler_enable'] = true
+        node.set['datadog']['use_ec2_instance_id'] = true
+      end.converge described_recipe
+    end
+
+    it_behaves_like 'a chef-handler-datadog installer'
+
+    it_behaves_like 'a chef-handler-datadog runner'
+  end
+
+  context 'multiple endpoints' do
+    cached(:chef_run) do
+      ChefSpec::SoloRunner.new(
+        platform: 'ubuntu',
+        version: '14.04'
+      ) do |node|
+        node.set['datadog']['api_key'] = 'somethingnotnil'
+        node.set['datadog']['application_key'] = 'somethingnotnil2'
+        node.set['datadog']['chef_handler_enable'] = true
+        node.set['datadog']['use_ec2_instance_id'] = true
+        node.set['datadog']['extra_endpoints']['qqqq']['enabled'] = true
+        node.set['datadog']['extra_endpoints']['qqqq']['api_key'] = 'something'
+        node.set['datadog']['extra_endpoints']['qqqq']['application_key'] = 'something2'
+      end.converge described_recipe
+    end
+
+    extra_endpoints = [
+      Mash.new(api_key: 'something',
+               application_key: 'something2')
+    ]
+
+    it_behaves_like 'a chef-handler-datadog installer'
+
+    it_behaves_like 'a chef-handler-datadog runner', extra_endpoints
+  end
+  context 'multiple endpoints disabled' do
+    cached(:chef_run) do
+      ChefSpec::SoloRunner.new(
+        platform: 'ubuntu',
+        version: '14.04'
+      ) do |node|
+        node.set['datadog']['api_key'] = 'somethingnotnil'
+        node.set['datadog']['application_key'] = 'somethingnotnil2'
+        node.set['datadog']['chef_handler_enable'] = true
+        node.set['datadog']['use_ec2_instance_id'] = true
+        node.set['datadog']['extra_endpoints']['qqqq']['enabled'] = false
+        node.set['datadog']['extra_endpoints']['qqqq']['api_key'] = 'something'
+        node.set['datadog']['extra_endpoints']['qqqq']['application_key'] = 'something2'
+      end.converge described_recipe
+    end
+
+    it_behaves_like 'a chef-handler-datadog installer'
+
+    it_behaves_like 'a chef-handler-datadog runner'
+  end
+end