1 files changed, 52 insertions, 0 deletions
diff --git a/spec/graphql/mutations/incident_management/timeline_event_tag/create_spec.rb b/spec/graphql/mutations/incident_management/timeline_event_tag/create_spec.rb
new file mode 100644
index 00000000000..57a32f7e4bc
--- /dev/null
+++ b/spec/graphql/mutations/incident_management/timeline_event_tag/create_spec.rb
@@ -0,0 +1,52 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Mutations::IncidentManagement::TimelineEventTag::Create do
+  let_it_be(:current_user) { create(:user) }
+  let_it_be_with_reload(:project) { create(:project) }
+
+  let(:args) { { name: 'Test tag 1' } }
+
+  before do
+    project.add_maintainer(current_user)
+  end
+
+  specify { expect(described_class).to require_graphql_authorizations(:admin_incident_management_timeline_event_tag) }
+
+  describe '#resolve' do
+    subject(:resolve) { mutation_for(project, current_user).resolve(project_path: project.full_path, **args) }
+
+    context 'when user has permission to create timeline event tag' do
+      it 'adds the tag to the project' do
+        expect { resolve }.to change(IncidentManagement::TimelineEventTag, :count).by(1)
+        expect(project.incident_management_timeline_event_tags.by_names(['Test tag 1']).pluck_names)
+          .to match_array(['Test tag 1'])
+      end
+    end
+
+    context 'when TimelineEventTags::CreateService responds with an error' do
+      let(:args) { {} }
+
+      it 'returns errors' do
+        expect(resolve).to eq(timeline_event_tag: nil, errors: ["Name can't be blank and Name is invalid"])
+      end
+    end
+
+    context 'when user has no permissions to create tags on a project' do
+      before do
+        project.add_developer(current_user)
+      end
+
+      it 'raises an error' do
+        expect { resolve }.to raise_error(Gitlab::Graphql::Errors::ResourceNotAvailable)
+      end
+    end
+  end
+
+  private
+
+  def mutation_for(project, user)
+    described_class.new(object: project, context: { current_user: user }, field: nil)
+  end
+end