Add event presenter

This presenter will be used in an upcoming MR which adds
rendering of epic events on group activity page.

2 files changed, 42 insertions, 1 deletions

diff --git a/spec/helpers/events_helper_spec.rb b/spec/helpers/events_helper_spec.rb
index 3d15306d4d2..e062c841717 100644
--- a/spec/helpers/events_helper_spec.rb
+++ b/spec/helpers/events_helper_spec.rb
@@ -27,7 +27,7 @@ describe EventsHelper do
   end
 
   describe '#event_feed_url' do
-    let(:event) { create(:event) }
+    let(:event) { create(:event).present }
     let(:project) { create(:project, :public, :repository) }
 
     context 'issue' do
diff --git a/spec/presenters/event_presenter_spec.rb b/spec/presenters/event_presenter_spec.rb
new file mode 100644
index 00000000000..79f5e359141
--- /dev/null
+++ b/spec/presenters/event_presenter_spec.rb
@@ -0,0 +1,41 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe EventPresenter do
+  include Gitlab::Routing.url_helpers
+
+  set(:group) { create(:group) }
+  set(:project) { create(:project, group: group) }
+  set(:target) { create(:milestone, project: project) }
+  set(:group_event) { create(:event, :created, project: nil, group: group, target: target) }
+  set(:project_event) { create(:event, :created, project: project, target: target) }
+
+  describe '#resource_parent_name' do
+    context 'with group event' do
+      subject { group_event.present.resource_parent_name }
+
+      it { is_expected.to eq(group.full_name) }
+    end
+
+    context 'with project label' do
+      subject { project_event.present.resource_parent_name }
+
+      it { is_expected.to eq(project.full_name) }
+    end
+  end
+
+  describe '#target_link_options' do
+    context 'with group event' do
+      subject { group_event.present.target_link_options }
+
+      it { is_expected.to eq([group, target]) }
+    end
+
+    context 'with project label' do
+      subject { project_event.present.target_link_options }
+
+      it { is_expected.to eq([group.becomes(Namespace), project, target]) }
+    end
+  end
+end