1 files changed, 90 insertions, 0 deletions
diff --git a/qa/qa/specs/features/browser_ui/4_verify/pipeline/pipeline_editor_branch_switcher_spec.rb b/qa/qa/specs/features/browser_ui/4_verify/pipeline/pipeline_editor_branch_switcher_spec.rb
new file mode 100644
index 00000000000..bb9b5feed2e
--- /dev/null
+++ b/qa/qa/specs/features/browser_ui/4_verify/pipeline/pipeline_editor_branch_switcher_spec.rb
@@ -0,0 +1,90 @@
+# frozen_string_literal: true
+
+module QA
+  RSpec.describe 'Verify' do
+    describe 'Pipeline editor', :requires_admin do
+      let(:project) do
+        Resource::Project.fabricate_via_api! do |project|
+          project.name = 'pipeline-editor-project'
+        end
+      end
+
+      let!(:commit) do
+        Resource::Repository::Commit.fabricate_via_api! do |commit|
+          commit.project = project
+          commit.commit_message = 'Add .gitlab-ci.yml'
+          commit.add_files(
+            [
+              {
+                file_path: '.gitlab-ci.yml',
+                content: default_file_content
+              }
+            ]
+          )
+        end
+      end
+
+      let!(:production_push) do
+        Resource::Repository::Push.fabricate! do |push|
+          push.repository_http_uri = project.repository_http_location.uri
+          push.branch_name = 'production'
+          push.file_name = '.gitlab-ci.yml'
+          push.file_content = production_file_content
+        end
+      end
+
+      let(:default_file_content) do
+        <<~YAML
+          stages:
+            - test
+          
+          initialize:
+            stage: test
+            script:
+              - echo "initialized in #{project.default_branch}"
+        YAML
+      end
+
+      let(:production_file_content) do
+        <<~YAML
+          stages:
+            - test
+          
+          initialize:
+            stage: test
+            script:
+              - echo "initialized in production"
+        YAML
+      end
+
+      before do
+        Runtime::Feature.enable(:pipeline_editor_branch_switcher)
+        Flow::Login.sign_in
+        project.visit!
+        Page::Project::Menu.perform(&:go_to_pipeline_editor)
+      end
+
+      after do
+        Runtime::Feature.disable(:pipeline_editor_branch_switcher)
+        project.remove_via_api!
+        Page::Main::Menu.perform(&:sign_out)
+      end
+
+      it 'can switch branches and target branch field updates accordingly', testcase: 'https://gitlab.com/gitlab-org/quality/testcases/-/issues/1856' do
+        Page::Project::PipelineEditor::Show.perform do |show|
+          expect(show).to have_branch_selector_button
+
+          show.click_branch_selector_button
+          show.select_branch_from_dropdown(production_push.branch_name)
+
+          expect(show.target_branch_name).to eq(production_push.branch_name)
+
+          show.click_branch_selector_button
+          show.select_branch_from_dropdown(project.default_branch)
+
+          expect(show.target_branch_name).to eq(project.default_branch)
+        end
+      end
+    end
+  end
+end