1 files changed, 51 insertions, 0 deletions
diff --git a/spec/services/groups/update_service_spec.rb b/spec/services/groups/update_service_spec.rb
new file mode 100644
index 00000000000..c759e32342d
--- /dev/null
+++ b/spec/services/groups/update_service_spec.rb
@@ -0,0 +1,51 @@
+require 'spec_helper'
+
+describe Groups::UpdateService, services: true do
+    let!(:user)    { create(:user) }
+    let!(:private_group)    { create(:group, visibility_level: Gitlab::VisibilityLevel::PRIVATE) }
+    let!(:internal_group)   { create(:group, visibility_level: Gitlab::VisibilityLevel::INTERNAL) }
+    let!(:public_group)     { create(:group, visibility_level: Gitlab::VisibilityLevel::PUBLIC) }
+
+  describe "execute" do
+    context "project visibility_level validation" do
+
+      context "public group with public projects" do
+        let!(:service) { described_class.new(public_group, user, visibility_level: Gitlab::VisibilityLevel::INTERNAL ) }
+
+        before do
+          public_group.add_user(user, Gitlab::Access::MASTER)
+          create(:project, :public, group: public_group, name: 'B', path: 'B')
+        end
+
+        it "cant downgrade permission level" do
+          expect(service.execute).to be_falsy
+          expect(public_group.errors.count).to eq(1)
+        end
+      end
+
+    context "internal group with internal project" do
+        let!(:service) { described_class.new(internal_group, user, visibility_level: Gitlab::VisibilityLevel::PRIVATE ) }
+
+        before do
+          internal_group.add_user(user, Gitlab::Access::MASTER)
+          create(:project, :internal, group: internal_group, name: 'B', path: 'B')
+        end
+
+        it "cant downgrade permission level" do
+          expect(service.execute).to be_falsy
+          expect(internal_group.errors.count).to eq(1)
+        end
+      end
+    end
+  end
+
+  context "unauthorized visibility_level validation" do
+    let!(:service) { described_class.new(internal_group, user, visibility_level: 99 ) }
+    before { internal_group.add_user(user, Gitlab::Access::MASTER) }
+
+    it "does not change permission level" do
+      expect(service.execute).to be_falsy
+      expect(internal_group.errors.count).to eq(1)
+    end
+  end
+end