1 files changed, 38 insertions, 0 deletions
diff --git a/spec/models/ci/catalog/listing_spec.rb b/spec/models/ci/catalog/listing_spec.rb
new file mode 100644
index 00000000000..b6a9372c8b9
--- /dev/null
+++ b/spec/models/ci/catalog/listing_spec.rb
@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Ci::Catalog::Listing, feature_category: :pipeline_composition do
+  let_it_be(:namespace) { create(:namespace) }
+  let_it_be(:project_1) { create(:project, namespace: namespace) }
+  let_it_be(:project_2) { create(:project, namespace: namespace) }
+  let_it_be(:project_3) { create(:project) }
+
+  let(:list) { described_class.new(namespace) }
+
+  describe '#new' do
+    context 'when namespace is not a root namespace' do
+      let(:namespace) { create(:group, :nested) }
+
+      it 'raises an exception' do
+        expect { list }.to raise_error(ArgumentError, 'Namespace is not a root namespace')
+      end
+    end
+  end
+
+  describe '#resources' do
+    subject(:resources) { list.resources }
+
+    context 'when the namespace has no catalog resources' do
+      it { is_expected.to be_empty }
+    end
+
+    context 'when the namespace has catalog resources' do
+      let!(:resource) { create(:catalog_resource, project: project_1) }
+
+      it 'contains only catalog resources for projects in that namespace' do
+        is_expected.to contain_exactly(resource)
+      end
+    end
+  end
+end