1 files changed, 57 insertions, 0 deletions
diff --git a/spec/support/update_invalid_issuable.rb b/spec/support/update_invalid_issuable.rb
new file mode 100644
index 00000000000..f984ac7bfa7
--- /dev/null
+++ b/spec/support/update_invalid_issuable.rb
@@ -0,0 +1,57 @@
+shared_examples 'update invalid issuable' do |klass|
+  let(:params) do
+    {
+      namespace_id: project.namespace.path,
+      project_id: project.path,
+      id: issuable.iid
+    }
+  end
+
+  let(:issuable) do
+    klass == Issue ? issue : merge_request
+  end
+
+  before do
+    if klass == Issue
+      params.merge!(issue: { title: "any" })
+    else
+      params.merge!(merge_request: { title: "any" })
+    end
+  end
+
+  context 'when updating causes conflicts' do
+    before do
+      allow_any_instance_of(issuable.class).to receive(:save).
+        and_raise(ActiveRecord::StaleObjectError.new(issuable, :save))
+    end
+
+    it 'renders edit when format is html' do
+      put :update, params
+
+      expect(response).to render_template(:edit)
+      expect(assigns[:conflict]).to be_truthy
+    end
+
+    it 'renders json error message when format is json' do
+      params.merge!(format: "json")
+
+      put :update, params
+
+      expect(response.status).to eq(409)
+      expect(JSON.parse(response.body)).to have_key('errors')
+    end
+  end
+
+  context 'when updating an invalid issuable' do
+    before do
+      key = klass == Issue ? :issue : :merge_request
+      params[key][:title] = ""
+    end
+
+    it 'renders edit when merge request is invalid' do
+      put :update, params
+
+      expect(response).to render_template(:edit)
+    end
+  end
+end