1 files changed, 62 insertions, 0 deletions

diff --git a/spec/graphql/mutations/issues/set_severity_spec.rb b/spec/graphql/mutations/issues/set_severity_spec.rb
new file mode 100644
index 00000000000..ed73d3b777e
--- /dev/null
+++ b/spec/graphql/mutations/issues/set_severity_spec.rb
@@ -0,0 +1,62 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Mutations::Issues::SetSeverity do
+  let_it_be(:user) { create(:user) }
+  let_it_be(:issue) { create(:incident) }
+  let(:mutation) { described_class.new(object: nil, context: { current_user: user }, field: nil) }
+
+  specify { expect(described_class).to require_graphql_authorizations(:update_issue) }
+
+  describe '#resolve' do
+    let(:severity) { 'CRITICAL' }
+    let(:mutated_incident) { subject[:issue] }
+
+    subject(:resolve) { mutation.resolve(project_path: issue.project.full_path, iid: issue.iid, severity: severity) }
+
+    context 'when the user cannot update the issue' do
+      it 'raises an error' do
+        expect { resolve }.to raise_error(Gitlab::Graphql::Errors::ResourceNotAvailable)
+      end
+    end
+
+    context 'when the user can update the issue' do
+      before do
+        issue.project.add_developer(user)
+      end
+
+      context 'when issue type is incident' do
+        context 'when severity has a correct value' do
+          it 'updates severity' do
+            expect(resolve[:issue].severity).to eq('critical')
+          end
+
+          it 'returns no errors' do
+            expect(resolve[:errors]).to be_empty
+          end
+        end
+
+        context 'when severity has an unsuported value' do
+          let(:severity) { 'unsupported-severity' }
+
+          it 'sets severity to default' do
+            expect(resolve[:issue].severity).to eq(IssuableSeverity::DEFAULT)
+          end
+
+          it 'returns no errorsr' do
+            expect(resolve[:errors]).to be_empty
+          end
+        end
+      end
+
+      context 'when issue type is not incident' do
+        let!(:issue) { create(:issue) }
+
+        it 'does not updates the issue' do
+          expect { resolve }.not_to change { issue.updated_at }
+        end
+      end
+    end
+  end
+end