CentOS 8 support

- Update ChefSpec

Depends-On: https://review.opendev.org/c/openstack/openstack-chef/+/814234
Depends-On: https://review.opendev.org/c/openstack/cookbook-openstack-common/+/814235
Change-Id: I832a910d9054c2ddfde28ed2522efe7c0f414588
Signed-off-by: Lance Albertson <lance@osuosl.org>

spec/mariadb-client-redhat_spec.rb

@@ -1,18 +1,27 @@
 require_relative 'spec_helper'
 
 describe 'openstack-ops-database::mariadb-client' do
-  describe 'redhat' do
-    let(:runner) { ChefSpec::SoloRunner.new(REDHAT_OPTS) }
-    let(:node) do
-      runner.node
-    end
-    cached(:chef_run) do
-      runner.node.override['openstack']['db']['service_type'] = 'mariadb'
-      runner.converge(described_recipe)
-    end
+  ALL_RHEL.each do |p|
+    context "redhat #{p[:version]}" do
+      let(:runner) { ChefSpec::SoloRunner.new(p) }
+      let(:node) do
+        runner.node
+      end
+      cached(:chef_run) do
+        runner.node.override['openstack']['db']['service_type'] = 'mariadb'
+        runner.converge(described_recipe)
+      end
 
-    it 'installs mariadb python client packages' do
-      expect(chef_run).to install_package('MySQL-python')
+      case p
+      when REDHAT_7
+        it do
+          expect(chef_run).to install_package('MySQL-python')
+        end
+      when REDHAT_8
+        it do
+          expect(chef_run).to install_package('python3-PyMySQL')
+        end
+      end
     end
   end
 end

spec/spec_helper.rb

@@ -7,11 +7,21 @@ RSpec.configure do |config|
   config.log_level = :warn
 end
 
-REDHAT_OPTS = {
+REDHAT_7 = {
   platform: 'redhat',
   version: '7',
 }.freeze
 
+REDHAT_8 = {
+  platform: 'redhat',
+  version: '8',
+}.freeze
+
+ALL_RHEL = [
+  REDHAT_7,
+  REDHAT_8,
+].freeze
+
 UBUNTU_OPTS = {
   platform: 'ubuntu',
   version: '18.04',