1 files changed, 52 insertions, 0 deletions
diff --git a/spec/support/shared_examples/services/base_rpm_service_shared_examples.rb b/spec/support/shared_examples/services/base_rpm_service_shared_examples.rb
new file mode 100644
index 00000000000..c9520852a5b
--- /dev/null
+++ b/spec/support/shared_examples/services/base_rpm_service_shared_examples.rb
@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+RSpec.shared_examples 'handling rpm xml file' do
+  include_context 'with rpm package data'
+
+  let(:xml) { nil }
+  let(:data) { {} }
+
+  context 'when generate empty xml' do
+    it 'generate expected xml' do
+      expect(subject).to eq(empty_xml)
+    end
+  end
+
+  context 'when updating existing xml' do
+    let(:xml) { empty_xml }
+    let(:data) { xml_update_params }
+
+    shared_examples 'changing root tag attribute' do
+      it "increment previous 'packages' value by 1" do
+        previous_value = Nokogiri::XML(xml).at(described_class::ROOT_TAG).attributes["packages"].value.to_i
+        new_value = Nokogiri::XML(subject).at(described_class::ROOT_TAG).attributes["packages"].value.to_i
+
+        expect(previous_value + 1).to eq(new_value)
+      end
+    end
+
+    it 'generate valid xml add expected xml node to existing xml' do
+      # Have one root attribute
+      result = Nokogiri::XML::Document.parse(subject).remove_namespaces!
+      expect(result.children.count).to eq(1)
+
+      # Root node has 1 child with generated node
+      expect(result.xpath("//#{described_class::ROOT_TAG}/package").count).to eq(1)
+    end
+
+    context 'when empty xml' do
+      it_behaves_like 'changing root tag attribute'
+    end
+
+    context 'when xml has children' do
+      let(:xml) { described_class.new(xml: empty_xml, data: data).execute }
+
+      it 'has children nodes' do
+        result = Nokogiri::XML::Document.parse(xml).remove_namespaces!
+        expect(result.children.count).to be > 0
+      end
+
+      it_behaves_like 'changing root tag attribute'
+    end
+  end
+end