1 files changed, 55 insertions, 0 deletions
diff --git a/spec/graphql/mutations/merge_requests/set_draft_spec.rb b/spec/graphql/mutations/merge_requests/set_draft_spec.rb
new file mode 100644
index 00000000000..697b2e5b007
--- /dev/null
+++ b/spec/graphql/mutations/merge_requests/set_draft_spec.rb
@@ -0,0 +1,55 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Mutations::MergeRequests::SetDraft do
+  let_it_be(:merge_request) { create(:merge_request) }
+  let_it_be(:user) { create(:user) }
+
+  subject(:mutation) { described_class.new(object: nil, context: { current_user: user }, field: nil) }
+
+  specify { expect(described_class).to require_graphql_authorizations(:update_merge_request) }
+
+  describe '#resolve' do
+    let(:draft) { true }
+    let(:mutated_merge_request) { subject[:merge_request] }
+
+    subject { mutation.resolve(project_path: merge_request.project.full_path, iid: merge_request.iid, draft: draft) }
+
+    it_behaves_like 'permission level for merge request mutation is correctly verified'
+
+    context 'when the user can update the merge request' do
+      before do
+        merge_request.project.add_developer(user)
+      end
+
+      it 'returns the merge request as a draft' do
+        expect(mutated_merge_request).to eq(merge_request)
+        expect(mutated_merge_request).to be_draft
+        expect(subject[:errors]).to be_empty
+      end
+
+      it 'returns errors if/when merge request could not be updated' do
+        # Make the merge request invalid
+        merge_request.allow_broken = true
+        merge_request.update!(source_project: nil)
+
+        expect(subject[:errors]).not_to be_empty
+      end
+
+      context 'when passing draft as false' do
+        let(:draft) { false }
+
+        it 'removes `Draft` from the title' do
+          merge_request.update!(title: "Draft: working on it")
+
+          expect(mutated_merge_request).not_to be_draft
+        end
+
+        it 'does not do anything if the title did not start with draft' do
+          expect(mutated_merge_request).not_to be_draft
+        end
+      end
+    end
+  end
+end