it would help if I actually added the test files

spec/acceptance/fixtures/securitygroup.pp.tmpl

@@ -0,0 +1,10 @@
+ec2_securitygroup { '{{name}}':
+  ensure => {{ensure}},
+  region => '{{region}}',
+  description => '{{description}}',
+  tags            => {
+  {{#tags}}
+    {{k}} => '{{v}}',
+  {{/tags}}
+  }
+}

spec/acceptance/securitygroup_spec.rb

@@ -0,0 +1,68 @@
+require 'spec_helper_acceptance'
+require 'securerandom'
+
+describe "ec2_securitygroup" do
+
+  before(:all) do
+    @default_region = 'sa-east-1'
+    @ec2 = Ec2Helper.new(@default_region)
+    @template = 'securitygroup.pp.tmpl'
+  end
+
+  def find_group(name)
+    groups = @ec2.get_groups(name)
+    expect(groups.count).to eq(1)
+    groups.first
+  end
+
+  def has_matching_tags(group, tags)
+    group_tags = {}
+    group.tags.each { |s| group_tags[s.key.to_sym] = s.value if s.key != 'Name' }
+
+    symmetric_difference = tags.to_set ^ group_tags.to_set
+    expect(symmetric_difference).to be_empty
+  end
+
+  describe 'should create a new security group' do
+
+    before(:all) do
+      @config = {
+        :name => "#{PuppetManifest.env_id}-#{SecureRandom.uuid}",
+        :region => @default_region,
+        :ensure => 'present',
+        :description => 'short lived group created by acceptance tests',
+        :tags => {
+          :department => 'engineering',
+          :project    => 'cloud',
+          :created_by => 'aws-acceptance'
+        }
+      }
+
+      PuppetManifest.new(@template, @config).apply
+      @group = find_group(@config[:name])
+    end
+
+    after(:all) do
+      new_config = @config.update({:ensure => 'absent'})
+      PuppetManifest.new(@template, new_config).apply
+    end
+
+    it "with the specified name" do
+      expect(@group.group_name).to eq(@config[:name])
+    end
+
+    it "isn't attached to a VPC" do
+      expect(@group.vpc_id).to eq(nil)
+    end
+
+    it "with the specified tags" do
+      has_matching_tags(@group, @config[:tags])
+    end
+
+    it "with the specified description" do
+      expect(@group.description).to eq(@config[:description])
+    end
+
+  end
+
+end