Added acceptance for keyring

Author: praj1001

spec/acceptance/apt_keyring_spec.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+require 'spec_helper_acceptance'
+
+describe 'apt::keyring' do
+  context 'when using default values and source specified explicitly' do
+    keyring_pp = <<-MANIFEST
+    apt::keyring { 'puppetlabs-keyring.gpg':
+  		source => 'https://apt.puppetlabs.com/keyring.gpg',
+    }
+    MANIFEST
+
+    it 'applies idempotently' do
+      retry_on_error_matching do
+        idempotent_apply(pp)
+      end
+    end
+  end
+end