Add unit test for client.pp

1) Add unit test for magnum::client class.
2) Fix package_ensure default value, the present should
   be enclosed in single quotation marks in order to
   indicate that it is string.

Change-Id: I553491782e6c734ef8c6c15d1ba7fc4d5617e3a3

manifests/client.pp

@@ -6,10 +6,10 @@
 #
 # [*package_ensure*]
 #   (optional) The state of the package
-#   Defaults to present
+#   Defaults to 'present'
 #
 class magnum::client (
-  $package_ensure = present
+  $package_ensure = 'present'
 ) {
 
   include ::magnum::deps

spec/classes/magnum_client_spec.rb

@@ -0,0 +1,39 @@
+require 'spec_helper'
+
+describe 'magnum::client' do
+
+  shared_examples_for 'magnum client' do
+
+    it { is_expected.to contain_class('magnum::deps') }
+    it { is_expected.to contain_class('magnum::params') }
+
+    it 'installs magnum client package' do
+      is_expected.to contain_package('python-magnumclient').with(
+        :ensure => 'present',
+        :name   => platform_params[:client_package],
+        :tag    => 'openstack',
+      )
+    end
+  end
+
+  on_supported_os({
+    :supported_os   => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
+
+      let(:platform_params) do
+        case facts[:osfamily]
+        when 'Debian'
+          { :client_package => 'python-magnumclient' }
+        when 'RedHat'
+          { :client_package => 'python2-magnumclient' }
+        end
+      end
+      it_configures 'magnum client'
+    end
+  end
+
+end