1 files changed, 124 insertions, 0 deletions
diff --git a/spec/services/packages/maven/metadata/create_plugins_xml_service_spec.rb b/spec/services/packages/maven/metadata/create_plugins_xml_service_spec.rb
new file mode 100644
index 00000000000..6fc1087940d
--- /dev/null
+++ b/spec/services/packages/maven/metadata/create_plugins_xml_service_spec.rb
@@ -0,0 +1,124 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe ::Packages::Maven::Metadata::CreatePluginsXmlService do
+  let_it_be(:group_id) { 'my/test' }
+  let_it_be(:package) { create(:maven_package, name: group_id, version: nil) }
+
+  let(:plugins_in_database) { %w[one-maven-plugin two three-maven-plugin] }
+  let(:plugins_in_xml) { %w[one-maven-plugin two three-maven-plugin] }
+  let(:service) { described_class.new(metadata_content: metadata_xml, package: package) }
+
+  describe '#execute' do
+    subject { service.execute }
+
+    before do
+      next unless package
+
+      plugins_in_database.each do |plugin|
+        create(
+          :maven_package,
+          name: "#{group_id}/#{plugin}",
+          version: '1.0.0',
+          project: package.project,
+          maven_metadatum_attributes: {
+            app_group: group_id.tr('/', '.'),
+            app_name: plugin,
+            app_version: '1.0.0'
+          }
+        )
+      end
+    end
+
+    shared_examples 'returning an xml with plugins from the database' do
+      it 'returns an metadata versions xml with versions in the database', :aggregate_failures do
+        expect(subject).to be_success
+        expect(subject.payload[:changes_exist]).to eq(true)
+        expect(subject.payload[:empty_versions]).to eq(false)
+        expect(plugins_from(subject.payload[:metadata_content])).to match_array(plugins_in_database)
+      end
+    end
+
+    shared_examples 'returning no changes' do
+      it 'returns no changes', :aggregate_failures do
+        expect(subject).to be_success
+        expect(subject.payload).to eq(changes_exist: false, empty_versions: false)
+      end
+    end
+
+    context 'with same plugins on both sides' do
+      it_behaves_like 'returning no changes'
+    end
+
+    context 'with more plugins' do
+      let(:additional_plugins) { %w[four-maven-plugin five] }
+
+      context 'in database' do
+        let(:plugins_in_database) { plugins_in_xml + additional_plugins }
+
+        # we can't distinguish that the additional plugin are actually maven plugins
+        it_behaves_like 'returning no changes'
+      end
+
+      context 'in xml' do
+        let(:plugins_in_xml) { plugins_in_database + additional_plugins }
+
+        it_behaves_like 'returning an xml with plugins from the database'
+      end
+    end
+
+    context 'with no versions in the database' do
+      let(:plugins_in_database) { [] }
+
+      it 'returns a success', :aggregate_failures do
+        result = subject
+
+        expect(result).to be_success
+        expect(result.payload).to eq(changes_exist: true, empty_plugins: true)
+      end
+    end
+
+    context 'with an incomplete metadata content' do
+      let(:metadata_xml) { '<metadata></metadata>' }
+
+      it_behaves_like 'returning an error service response', message: 'metadata_content is invalid'
+    end
+
+    context 'with an invalid metadata content' do
+      let(:metadata_xml) { '<meta></metadata>' }
+
+      it_behaves_like 'returning an error service response', message: 'metadata_content is invalid'
+    end
+
+    it_behaves_like 'handling metadata content pointing to a file for the create xml service'
+
+    it_behaves_like 'handling invalid parameters for create xml service'
+  end
+
+  def metadata_xml
+    Nokogiri::XML::Builder.new do |xml|
+      xml.metadata do
+        xml.plugins do
+          plugins_in_xml.each do |plugin|
+            xml.plugin do
+              xml.name(plugin)
+              xml.prefix(prefix_from(plugin))
+              xml.artifactId(plugin)
+            end
+          end
+        end
+      end
+    end.to_xml
+  end
+
+  def prefix_from(artifact_id)
+    artifact_id.gsub(/-?maven-?/, '')
+               .gsub(/-?plugin-?/, '')
+  end
+
+  def plugins_from(xml_content)
+    doc = Nokogiri::XML(xml_content)
+    doc.xpath('//metadata/plugins/plugin/artifactId').map(&:content)
+  end
+end