1 files changed, 81 insertions, 0 deletions
diff --git a/spec/graphql/mutations/design_management/move_spec.rb b/spec/graphql/mutations/design_management/move_spec.rb
new file mode 100644
index 00000000000..7519347d07c
--- /dev/null
+++ b/spec/graphql/mutations/design_management/move_spec.rb
@@ -0,0 +1,81 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Mutations::DesignManagement::Move do
+  include DesignManagementTestHelpers
+
+  let_it_be(:issue) { create(:issue) }
+  let_it_be(:designs) { create_list(:design, 3, issue: issue) }
+  let_it_be(:developer) { create(:user, developer_projects: [issue.project]) }
+
+  let(:user) { developer }
+
+  let(:mutation) { described_class.new(object: nil, context: { current_user: user }, field: nil) }
+
+  let(:current_design) { designs.first }
+  let(:previous_design) { designs.second }
+  let(:next_design) { designs.third }
+
+  before do
+    enable_design_management
+  end
+
+  describe "#resolve" do
+    subject(:resolve) do
+      args = {
+        current_design: current_design.to_global_id,
+        previous_design: previous_design&.to_global_id,
+        next_design: next_design&.to_global_id
+      }.compact
+
+      mutation.resolve(args)
+    end
+
+    shared_examples "resource not available" do
+      it "raises an error" do
+        expect { resolve }.to raise_error(Gitlab::Graphql::Errors::ResourceNotAvailable)
+      end
+    end
+
+    context 'when the feature is not available' do
+      before do
+        enable_design_management(false)
+      end
+
+      it_behaves_like 'resource not available'
+    end
+
+    %i[current_design previous_design next_design].each do |binding|
+      context "When #{binding} cannot be found" do
+        let(binding) { build_stubbed(:design) }
+
+        it_behaves_like 'resource not available'
+      end
+    end
+
+    context 'the service runs' do
+      before do
+        expect_next_instance_of(::DesignManagement::MoveDesignsService) do |service|
+          expect(service).to receive(:execute).and_return(service_result)
+        end
+      end
+
+      context 'raising an error' do
+        let(:service_result) { ServiceResponse.error(message: 'bang!') }
+
+        it 'reports the service-level error' do
+          expect(resolve).to include(errors: ['bang!'], design_collection: eq(issue.design_collection))
+        end
+      end
+
+      context 'successfully' do
+        let(:service_result) { ServiceResponse.success }
+
+        it 'reports the service-level error' do
+          expect(resolve).to include(errors: be_empty, design_collection: eq(issue.design_collection))
+        end
+      end
+    end
+  end
+end