Add quote to regex in hash storage

Author: pnikrat

lib/lit/adapters/hash_storage.rb

@@ -34,7 +34,7 @@ def subtree_of_key(key)
     end
 
     def subtree_keys(key)
-      keys.select { |k| k.match?(/\A#{key}*/) }
+      keys.select { |k| k.match?(/\A#{Regexp.quote(key)}*/) }
     end
 
     def form_cache_localizations(keys_of_subtree)

test/unit/lit_behaviour_test.rb

@@ -264,6 +264,17 @@ def teardown
     assert_equal find_localization_for('interpolated_key', :en).default_value, 'Candidate %{name}'
   end
 
+  test 'it does not break on simple form/complicated keys when using regex in hash storage' do
+    prev_kv_engine = Lit.key_value_engine
+    Lit.key_value_engine = 'hash'
+    key = 'helpers.label.meta_signings.contract_signings_attributes][0]' \
+          '[contract_documents.contract]'
+    result = I18n.t(key, default: 'Contract')
+    assert_equal result, 'Contract'
+    assert_equal find_localization_for(key, :en).default_value, 'Contract'
+    Lit.key_value_engine = prev_kv_engine
+  end
+
   private
 
   def find_localization_for(key, locale)