1 files changed, 20 insertions, 0 deletions
diff --git a/spec/rubocop/node_pattern_helper_spec.rb b/spec/rubocop/node_pattern_helper_spec.rb
new file mode 100644
index 00000000000..a141e81b618
--- /dev/null
+++ b/spec/rubocop/node_pattern_helper_spec.rb
@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+require 'rubocop_spec_helper'
+
+require_relative '../../rubocop/node_pattern_helper'
+
+RSpec.describe RuboCop::NodePatternHelper, feature_category: :tooling do
+  include described_class
+
+  describe '#const_pattern' do
+    it 'returns nested const node patterns' do
+      expect(const_pattern('Foo')).to eq('(const {nil? cbase} :Foo)')
+      expect(const_pattern('Foo::Bar')).to eq('(const (const {nil? cbase} :Foo) :Bar)')
+    end
+
+    it 'returns nested const node patterns with custom parent' do
+      expect(const_pattern('Foo::Bar', parent: 'nil?')).to eq('(const (const nil? :Foo) :Bar)')
+    end
+  end
+end