1 files changed, 77 insertions, 0 deletions
diff --git a/spec/support/shared_examples/quick_actions/merge_request/target_branch_quick_action_shared_examples.rb b/spec/support/shared_examples/quick_actions/merge_request/target_branch_quick_action_shared_examples.rb
index ccb4a85325b..cf2bdb1dd68 100644
--- a/spec/support/shared_examples/quick_actions/merge_request/target_branch_quick_action_shared_examples.rb
+++ b/spec/support/shared_examples/quick_actions/merge_request/target_branch_quick_action_shared_examples.rb
@@ -1,4 +1,81 @@
 # frozen_string_literal: true
 
 shared_examples 'target_branch quick action' do
+  describe '/target_branch command in merge request' do
+    let(:another_project) { create(:project, :public, :repository) }
+    let(:new_url_opts) { { merge_request: { source_branch: 'feature' } } }
+
+    before do
+      another_project.add_maintainer(user)
+      sign_in(user)
+    end
+
+    it 'changes target_branch in new merge_request' do
+      visit project_new_merge_request_path(another_project, new_url_opts)
+
+      fill_in "merge_request_title", with: 'My brand new feature'
+      fill_in "merge_request_description", with: "le feature \n/target_branch fix\nFeature description:"
+      click_button "Submit merge request"
+
+      merge_request = another_project.merge_requests.first
+      expect(merge_request.description).to eq "le feature \nFeature description:"
+      expect(merge_request.target_branch).to eq 'fix'
+    end
+
+    it 'does not change target branch when merge request is edited' do
+      new_merge_request = create(:merge_request, source_project: another_project)
+
+      visit edit_project_merge_request_path(another_project, new_merge_request)
+      fill_in "merge_request_description", with: "Want to update target branch\n/target_branch fix\n"
+      click_button "Save changes"
+
+      new_merge_request = another_project.merge_requests.first
+      expect(new_merge_request.description).to include('/target_branch')
+      expect(new_merge_request.target_branch).not_to eq('fix')
+    end
+  end
+
+  describe '/target_branch command from note' do
+    context 'when the current user can change target branch' do
+      before do
+        sign_in(user)
+        visit project_merge_request_path(project, merge_request)
+      end
+
+      it 'changes target branch from a note' do
+        add_note("message start \n/target_branch merge-test\n message end.")
+
+        wait_for_requests
+        expect(page).not_to have_content('/target_branch')
+        expect(page).to have_content('message start')
+        expect(page).to have_content('message end.')
+
+        expect(merge_request.reload.target_branch).to eq 'merge-test'
+      end
+
+      it 'does not fail when target branch does not exists' do
+        add_note('/target_branch totally_not_existing_branch')
+
+        expect(page).not_to have_content('/target_branch')
+
+        expect(merge_request.target_branch).to eq 'feature'
+      end
+    end
+
+    context 'when current user can not change target branch' do
+      before do
+        project.add_guest(guest)
+        sign_in(guest)
+        visit project_merge_request_path(project, merge_request)
+      end
+
+      it 'does not change target branch' do
+        add_note('/target_branch merge-test')
+
+        expect(page).not_to have_content '/target_branch merge-test'
+
+        expect(merge_request.target_branch).to eq 'feature'
+      end
+    end
+  end
 end